This thesis provides investigation into the interaction between quartz lamp emitters and polyether ether ketone (PEEK) powder. Calculations and experiments concerning the conductivity and emissivity of the powder at various temperatures are performed. The thermal profile of the emitter on a flat powder bed is captured using thermal imaging. The effect of exposing a pile of powder to the emitter and the subsequent thermal gradient through the pile is measured and analyzed. Based on these results, ramifications for the application of these emitters to selective laser sintering (SLS) machines for processing high temperature polymers such as PEEK are discussed. / text

Cette thèse consiste en une étude comparative des propriétés thermomécaniques de composites tissés à matrice thermoplastique (PEEK ou PPS) et thermodurcissable (époxy). Une analyse bibliographique a permis la comparaison les comportements des ces stratifies en fonction de la nature de la matrice, de la sollicitation et des conditions environnementales. Une étude expérimentale a conduit à une base de données des trois matériaux sous diverses sollicitations mécaniques (essais monotones élémentaires et structures) et différentes conditions environnementales (température et V.H.). Des essais sur assemblages boulonnes (simple et double recouvrement) ont également été réalisés. Une technique de mesure de champ par corrélation d'images numériques a permis d'étudier le comportement de stratifies troues. Enfin, un modèle de comportement élastoplastique orthotrope de stratifies tisses a matrice thermoplastique a été implémenté dans le code E.F. cast3m et valide pour différentes températures.

The cervical spine must provide structural support for the head, allow large range of motion and protect both the spinal cord and branching nerves. There are two types of spinal joints: the intervertebral discs which are flexible connections and the facets, which are articulating synovial joints. Both types degenerate with age. Current surgical treatments include spinal fusion and articulating disc replacement implants. If both disc and facet joints are degenerated, fusion is the only option. In spinal fusion, the disc is removed and the adjacent vertebrae are fused which causes abnormally high stress levels in adjacent discs. In disc replacement, an articulating device is inserted to restore intervertebral motion and mimic healthy spinal kinematics. Disc arthroplasty does not significantly increase adjacent level stress but the lack of rotational constraint causes increased facet contact pressures. Thus, there is a need for a cervical total level arthroplasty system (CTLAS) that has a disc implant specifically designed to preserve the facet joints and implants for facet arthroplasty that can act independently or in-unison with the disc replacement. The conceptual design of a CTLAS implant system was proposed that would replace the disc and the facet joints. To facilitate medical imaging, PEEK (polyetheretherkeytone) was selected as the structural and bearing material. In the present thesis, multi-station pin-on-plate wear testing was initiated for pairs of unfilled (OPT) and carbon-fiber-reinforced (CFR) PEEK. Wear is important in arthroplasty implant design because wear particles can cause osteolysis leading to loosening. A variety of experiments were performed to investigate the effects of load, contact geometry and lubricant composition on wear. CFR PEEK was found to have much lower and more predictable wear than OPT PEEK in the present experiments. The wear of OPT PEEK pairs showed sensitivity to lubricant protein concentration. The coefficient of friction during testing was found to be quite high (up to 0.5), which might have clinical implications. Also, some subsurface fatigue was found, exposing carbon fibers of CFR PEEK. This remains a concern for its long-term application. Further wear testing is recommended using actual implants in a spine wear simulator.

Made available in DSpace on 2016-06-02T19:12:20Z (GMT). No. of bitstreams: 1 4485.pdf: 10452784 bytes, checksum: c97ffcf09e06376e8d784b7641e46a27 (MD5) Previous issue date: 2012-04-27 / Universidade Federal de Minas Gerais / The main objectives of this dissertation were to study the short (tensile and impact) and long-term (fatigue) mechanical behavior of nanocomposites of poly(ether-ether-ketone), PEEK, with nanohydroxyapatite, nHA, for application as biocompatible materials. First of all, a preliminary study was conducted to determine the influence of the addition of nHA in the rheological, thermal and dynamic mechanical properties of PEEK, in order to choose an optimal formulation for large-scale preparation. The chosen composition with 10wt% of nHA was prepared by melt mixing in a co-rotating twin screw extruder. The resulting structure and dispersion were characterized by scanning electron microscopy (SEM) and rheological properties. Subsequently, the materials (PEEK and PEEK/nHA nanocomposite) were injection molded at 3 different conditions by varying the flow rate. The resulting morphologies were evaluated by polarized light optical microscopy (PLOM) and the degree of crystallinity of the samples was evaluated by differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXS). The mechanical properties of tensile, impact and fatigue of PEEK and nanocomposite were measured and correlated with the results of dynamic mechanical thermal analysis (DMTA) and the resulting morphology. It was found that the variation of the injection conditions did not change the materials properties significantly; however, the obtained long and short-term mechanical properties of the nanocomposite were within the range of cortical bone properties and, therefore, the nanocomposite can mechanically be used for medium load bearing implant applications, due to their limited modulus. Finally, tests with adult stem cells to determine in vitro biological response of the biomaterial were performed, which indicated that these cells proliferated faster in PEEK/nHA, indicating that the biological response is most favorable to the nanocomposite than to pure PEEK. / Esta dissertação teve como principal objetivo estudar as propriedades mecânicas de curta (tração e impacto) e longa duração (fadiga) de um nanocompósito de poli(éter-éter-cetona), PEEK, com nanohidroxiapatita, nHA, para aplicação como material biocompatível. Primeiramente, foi realizado um estudo preliminar para determinar a influência da adição da nHA nas propriedades reológicas, térmicas e dinâmico-mecânicas do PEEK, com o objetivo de escolher uma formulação ideal para preparo em grande escala do nanocompósito. Em seguida, a composição escolhida com 10% em massa de nHA foi preparada via mistura no estado fundido em uma extrusora de rosca dupla co-rotacional. A estrutura resultante e a dispersão foram caracterizadas por microscopia eletrônica de varredura (MEV) e por propriedades reológicas. Posteriormente, os materiais (PEEK/nHA e PEEK puro) foram moldados por injeção em 3 condições diferentes, variando-se a vazão. As morfologias obtidas foram avaliadas por microscopia ótica de luz polarizada (MOLP) e o grau de cristalinidade das amostras foi avaliado por calorimetria exploratória diferencial (DSC) e por difração de raios-X de alto ângulo (WAXS). As propriedades mecânicas de tração, impacto e fadiga do PEEK e do nanocompósito foram medidas e correlacionadas com os resultados de análise térmica dinâmicomecânica (DMTA) e com a morfologia resultante. Verificou-se que a variação nas condições de injeção não promoveram diferenças significativas nas propriedades dos materiais; no entanto, as propriedades mecânicas de curta e longa duração obtidas para o nanocompósito estavam dentro da faixa de propriedades do osso cortical sendo, portanto, o nanocompósito compatível mecanicamente para aplicações como implantes que não envolvam alto suporte de carga, devido à sua limitação de módulo elástico. Por fim, foram realizados testes com células-tronco adultas para determinar a resposta biológica in vitro do biomaterial produzido, os quais indicaram que a proliferação destas células ocorreu de forma mais rápida no PEEK/nHA, indicando que a resposta biológica é mais favorável ao nanocompósito do que ao PEEK puro.

Submitted by Regina Correa (rehecorrea@gmail.com) on 2016-10-03T20:29:08Z No. of bitstreams: 1 DissALM.pdf: 4634927 bytes, checksum: b4342e384fd20c4250c5311fa696a2d5 (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-10-05T13:52:20Z (GMT) No. of bitstreams: 1 DissALM.pdf: 4634927 bytes, checksum: b4342e384fd20c4250c5311fa696a2d5 (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-10-05T13:52:30Z (GMT) No. of bitstreams: 1 DissALM.pdf: 4634927 bytes, checksum: b4342e384fd20c4250c5311fa696a2d5 (MD5) / Made available in DSpace on 2016-10-05T14:00:51Z (GMT). No. of bitstreams: 1 DissALM.pdf: 4634927 bytes, checksum: b4342e384fd20c4250c5311fa696a2d5 (MD5) Previous issue date: 2014-09-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / In this dissertation the mechanical properties of short and long term of PEEK/nHA nanocomposites with potential application as orthopedic implants were studied. The nanohydroxyapatite (nHA) was surface-treated with the coupling agent aminoethylaminopropyltrimethoxysilane (AEAPTS). After treatment, the nanoparticles were mixed with the polymeric matrix of poly (ether ether ketone) (PEEK) in a twin screw extruder. Subsequently specimens of the nanocomposite were injection molded. These specimens were subjected to mechanical tests to have their properties compared with the pure polymer and the nanocomposite with the pure nHA. First, tensile tests were conducted; through these analyses, it was found the stress and strain at break increased. The presence of the silane increased the fatigue life of the nanocomposite suggesting a higher interaction between the matrix and the nanofiller. The impact tests confirmed the higher resistance of the sample with silanized nHA. It was concluded that the silanization of the nHA was effective, strengthening the interface PEEK/nHA; however, silane molecules also plastified the polymer matrix. The injected test specimens were subjected to annealing. The objective was to determine how the increase in crystallinity induced by annealing influenced the mechanical properties. After the annealing, the presence of the silane did not cause significant changes in the mechanical behavior of the material. Analysis of scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA) were done in order to characterize the structure of the nanocomposites. The morphology observed in the micrographs was correlated with the dynamic mechanical properties. It was concluded that the nanocomposite with silanized nHA besides having elastic modulus behavior similar to natural bone, also had a more homogeneous structure than the nanocomposite with pure nHA. / Foram estudadas as propriedades mecânicas de curta e longa duração de nanocompósitos de PEEK/nHA que possuem aplicação potencial como implantes ortopédicos. A nanohidroxiapatita (nHA) foi tratada com o agente de acoplagem aminoetilaminopropiltrimetoxissilano (AEAPTMS). Após o tratamento, a nanopartícula foi misturada à matriz polimérica de poli(éter-étercetona) (PEEK) em uma extrusora de rosca dupla. Foram moldados por injeção corpos de prova do nanocompósito, que foram submetidos a diversos ensaios mecânicos para terem suas propriedades comparadas com as do polímero puro e com as do nanocompósito com nHA pura. Através do ensaio de tração verificou-se que o Limite de Resistência à Tração (LRT) do nanocompósito diminuiu com a silanização da nanocarga; no entanto, a deformação na ruptura aumentou. Foram realizados ensaios de fadiga nos quais se verificou que a presença do silano aumentou a vida em fadiga do nanocompósito produzido, sugerindo maior interação entre a matriz e a nanocarga. Os ensaios de impacto, permitiram verificar a maior resistência da amostra com nHA silanizada. Provavelmente, as moléculas de silano plastificaram a matriz polimérica. É possível que tenha ocorrido oligomerização das moléculas de silano. Os corpos de prova injetados foram submetidos a um tratamento térmico posterior a injeção. O intuito foi verificar como o aumento da cristalinidade induzido pelo tratamento térmico influenciou nas propriedades mecânicas. Após o tratamento térmico, a presença do silano não ocasionou grandes modificações no comportamento mecânico do material. Também foram realizadas análises de microscopia eletrônica de varredura e análise dinâmico mecânica (MEV e DMA, respectivamente) com o intuito de caracterizar a estrutura do nanocompósito. A morfologia observada nas micrografias foi correlacionada com as propriedades dinâmico-mecânicas obtidas. Conclui-se que o nanocompósito silanizado além de ter módulo elástico próximo ao do osso natural (o que permite aplicação potencial como implantes ortopédicos), também possui uma estrutura mais homogênea que a do nanocompósito não silanizado.

Os compósitos termoplásticos de alto desempenho vêm despertando grande interesse dos fabricantes aeronáuticos por apresentarem algumas vantagens importantes em relação aos tradicionais compósitos termorrígidos, como por exemplo: melhor resistência ao impacto; maior tolerância ao dano; baixa flamabilidade; possibilidades de reprocessamento; não necessitam da utilização de auto-claves para o seu processamento e acondicionamento térmico em baixas temperaturas do pré-impregnado (-18C), pois são armazenados a temperatura ambiente e possuem vida indeterminada de armazenamento (shelf-life). O custo de desenvolvimento de técnicas de processamento e, principalmente, de certificação dos compósitos termoplásticos para uso em estruturas de responsabilidade estrutural primária, tem inibido no presente momento a maior aplicação destes materiais na indústria aeroespacial. O aprimoramento das técnicas atuais e aplicação de novas técnicas de processamento desenvolverão um papel fundamental para ultrapassagem destas barreiras atualmente impostas aos materiais termoplásticos de alto desempenho. Neste contexto, o objetivo do presente trabalho é estudar o processamento por moldagem por compressão a quente de um compósito termoplástico baseado em pré-impregnado de PEEK / fibra de carbono e sua caracterização pelas técnicas: calorimetria exploratória diferencial (DSC), análise termogravimétrica (TGA), análise térmica dinâmico-mecânica (DMTA), microscopia óptica de luz polarizada (MOLP) e resistência ao cisalhamento interlaminar (ILSS). Baseado nos resultados obtidos com as técnicas de DSC, TGA e MOLP foi determinado que a faixa de temperatura mais adequada para o processamento do PEEK encontra-se entre 380C e 440C, a partir do tecido préimpregnado TowFlex CPEEK-101. Por DMTA foi obtida a temperatura máxima de 115C para uso destes compósitos submetidos a cargas estruturais intermitentes. Para o mesmo processo de fabricação e tecido pré-impregnado, utilizando-se pressão de moldagem de 10 MPa, com 16 camadas de tecido, resultou em laminados com valores médios de ILSS de 19,4 MPa, enquanto que usando pressão de moldagem de 5MPa, com 12 camadas de tecido, os valores médios obtidos de ILSS foram de 14,7MPa. / The high performance thermoplastic composites have attracted great interest from aerospace manufacturers for presenting some important advantages over traditional thermoset composites, for example, better impact resistance, greater damage tolerance, low flammability, possibilities reprocessing do not require the use of autoclaves for processing and packing heat at low temperatures of the prepreg (-18 C) as they are stored at room temperature and indefinite storage life (shelf life). The cost of developing processing techniques and especially the certification of thermoplastic composite structures for use in primary structural responsibility, has inhibited at present the largest application of these materials in the aerospace industry. The improvement of current techniques and novel processing techniques to develop a fundamental role exceeded those barriers currently imposed on highperformance thermoplastic materials, requiring greater efforts in research of these solutions. In this context, the objective of this study is the processing by hot compression molding of a thermoplastic-based composite prepreg of PEEK / carbon fiber and its characterization by techniques: differential scanning calorimetry (DSC), thermogravimetric analysis (TGA ), dynamic mechanical thermal analysis (DMTA), polarized light microscopy (MOLP), heat shock (in progress) and shear strength (ILSS). Based on the results obtained with the techniques of DSC, TGA and MOLP was determined that the temperature range suitable for processing of PEEK is between 380 C and 440 C, from the fabric prepreg TowFlex CPEEK-101. By DMTA was obtained by the maximum temperature of 115 degrees to use these composites subjected to intermittent structural loads. For the same manufacturing process and fabric prepreg using molding pressure of 10 MPa, with 16 layers of fabric, resulting in laminates with average values of ILSS of 19.4 MPa, while using pressure molding 5MPa with 12 layers of tissue, average values of ILSS of 14.7 MPa.

Ziel der Studie Das Ziel dieser in-vitro-Studie war die Untersuchung des Einflusses einer künstlichen Alterungsphase von 10.000 Füge- und Trennzyklen unter Speichelschmierung auf das Haftkraft- und Verschleißverhaltens von konventionell gusstechnisch, galvanisch und im CAD/CAM-Verfahren hergestellten Parallelteleskopen. Material und Methode: Sechs verschiedene Prüfgruppen unterschiedlicher Materialkombinationen und Fertigungsweisen wurden ausgehend von einem gemeinsamen Primär- und Sekundärkronendesign zu je zehn Parallelteleskopen (n = 10) angefertigt: Gruppe 1 (GG): Gruppe 2 (NN): Gruppe 3 (ZG): Gruppe 4 (CC NN): Gruppe 5 (CC ZN): Gruppe 6 (CC ZP): Hochgoldhaltige Legierung (Gussverfahren) Edelmetallfreie Legierung (Gussverfahren) Zirkoniumdioxidkeramik/Galvanogold (Galvanotechnik) Edelmetallfreie Legierung (CAD/CAM) Zirkoniumdioxidkeramik/Edelmetallfreie Legierung (CAD/CAM) Zirkoniumdioxidkeramik/Polyetheretherketon (CAD/CAM) Unter Verwendung einer Vorlast von 50 N wurden die Haftkraftwerte in der Universalprüfmaschine (Zwick/Roell, Ulm, Deutschland) kontinuierlich aufgezeichnet und zu den Zeitpunkten t0 (= Ausgangszustand), t1 (= 50 Zyklen), t2, (= 5.000 Zyklen) und t3 (= 10.000 Zyklen) miteinander verglichen. Die Daten wurden unter Anwendung eines Kolmogorov- Smirnov-, Friedman-, Wilcoxon-Vorzeichen-Rang-, Kruskal-Wallis- und Mann-Whitney-U-Test bei einem Signifikanzniveau von p ≤ 0,05 ausgewertet (SPSS, V25). Zusätzlich wurden lichtmikroskopische Aufnahmen der Primärkronenoberflächen und Sekundärkroneninnenseiten zum Nachweis von Verschleißphänomenen durchgeführt. Zur Bestimmung der Linien- und Oberflächenrauheit dienten konfokalmikroskopische Aufnahmen der Patrizen. 135 Zusammenfassung Ergebnisse Bei allen Prüfgruppen wurde eine Abnahme der mittleren Haftkraftwerte registriert. Die geringsten Haftkraftverluste wiesen die gegossenen hochgoldhaltigen Teleskopkronen mit 1,58 % (GG), die größten Haftkraftverluste mit 36,17 % die gegossen edelmetallfreien Doppelkronen (NN) auf. Signifikante Haftkraftverluste präsentierten nach Durchlaufen der Belastungsphase ausschließlich die galvanischen und gefrästen ZrO2/PEEK Probekörper, die zugleich die höchsten und niedrigsten mittleren Haftkräfte demonstrierten (ZG: t0= 8,30N, t3= 6,20N; CC ZP: t0= 1,36N, t3= 1,25N; Wilcoxon-Vorzeichen-Rang-Test; pZG= 0,010, pCC ZP= 0,049). Die Retentionskräfte der gegossenen hochgoldhaltigen und edelmetallfreien Gruppen sowie der gefrästen Prüfgruppe der Materialkombination ZrO2/NEM (GG, NN , CC ZN) unterschieden sich zu keinem der Zeitpunkte t0-t3 signifikant und zeigten ebenfalls über die gesamte Versuchsdauer keinen signifikanten Haftkraftrückgang. Hingegen wichen zu allen Zeitpunkten t0-t3 die Retentionskräfte der metallfreien Doppelkronen (CC ZP) signifikant von allen anderen Materialkombinationen ab. Bei nahezu allen Probekörpern waren im Bereich der Kontaktflächen zwischen Primär- und Sekundärkronen Verschleißerscheinungen erkennbar. Lediglich die keramischen Primärkronen der Materialkombination ZrO2/PEEK unterlagen keinen Oberflächenveränderungen. Die geringste Linienrauheit und Oberflächenrauheit zeigten die Primärkronenoberfläche der frästechnisch hergestellten edelmetallfreien Doppelkronen (CC NN; Rat0= 0,0869 μm, Rat3= 0,125 μm, Sat0= 0,109 μm, Sat3= 0,180 μm). Die höchsten Rauheitswerte wurden für die keramischen Primärkronen der Gruppen ZG und CC ZP dokumentiert (ZG: Rat0= 0.454 μm, Sat0= 0.544 μm, Sat3= 0.612 μm; CC ZP: Rat3= 0.462 μm). Schlussfolgerung Unter den gewählten Versuchsbedingungen erreichten alle getesteten Herstellungsmethoden und Materialkombinationen klinisch suffiziente Haftkraftwerte, obwohl sich zwischen den einzelnen Prüfgruppen ausgeprägte Unterschiede hinsichtlich des Haftkraftverhaltens offenbarten. Während in diesen Untersuchungen die hochgoldhaltigen Legierungen im Bereich Teleskoptechnik den Grund für ihre langjährige Bewährung belegten, zeigte sich bei der ausschließlichen Verwendung edelmetallfreier Legierungen die frästechnische Herstellung der Gusstechnik aufgrund homogenerer und höherer Retentionswerte überlegen. Die Materialkombination aus Zirkoniumdioxidkeramik und Nichtedelmetall stellt eine ästhetische Alternative zur Galvanotechnik dar. In weiteren Untersuchungen sollte die 136 Zusammenfassung Passung und die Haftkraft der Materialkombination Zirkoniumdioxidkeramik/PEEK durch Variation der Fertigungsparameter optimiert werden. Insgesamt vermochte die CAD/CAM- Technologie dennoch ähnlich voraussagbare Ergebnisse wie der sich behauptende Goldstandard zu erzielen. Verschleiß ist elementarer Bestandteil des tribologischen Systems der Doppelkrone und wurde bei allen Prüfgruppen nachgewiesen. Im Allgemeinen erwies sich die Konfokalen Mikroskopie als geeignete Methode zur Bestimmung von Rauheits- und Flächenparametern bei Doppelkronenoberflächen. Ausgehend von den vergleichbaren Untersuchungsergebnissen stellt die CAD/CAM-Technologie für die tägliche Praxis unter Berücksichtigung der leichteren Friktionseinstellung im Herstellungsprozess, einer uneingeschränkten Reproduktion der Doppelkronen aufgrund der digitalen Speichermöglichkeit und der Reduktion von Kosten durch Zeit und Arbeitskraft eine ernstzunehmende Alternative zur konventionellen Guss- und Galvanotechnik dar. Die Eignung von CAD/CAM-gefertigten Doppelkronen sollte jedoch zusätzlich in klinischen Langzeituntersuchungen nachgewiesen werden. / Objective: This study aimed to investigate the effects of long-term use on the retention force and wear behavior of double crown systems. Methods: Based on a common double crown design sixty pairs of telescopic crowns were fabricated and divided into six groups, each consisting ten samples: “Gold standard” cast gold alloy primary and secondary crown (GG) and cast non-precious alloy (NN), computer-aided design (CAD)/computer-aided manufacturing (CAM)-milled zirconia primary crown and galvanoformed secondary crown (ZG), CAD/CAM-milled non-precious alloy primary and secondary crown (CC NN), CAD/CAM-milled zirconia primary crown and non-precious alloy secondary crown (CC ZN) and CAD/CAM-milled zirconia primary crown and polyetheretherketone (PEEK) secondary crown (CC ZP). In the constant presence of artificial saliva, all samples were subjected to 10,000 joining-separation cycles at a velocity of 120 mm/min. Wear was analyzed by reflected light microscopy and confocal microscopy before and after artificial aging. Results: Retention force losses were observed in each group after long-term use, with significant losses in the groups ZG and CC ZP (pZG = 0.01, pCC ZP = 0.049). During artificial aging, no significant differences in pull-off force were recorded for groups GG, NN and CC ZN. Regarding wear, merely the Y-TZP primary crowns of the CC ZP group displayed no surface changes. Significance: All tested production methods and material combinations seem to be suitable for clinical practice. CAD/CAM technology allows similarly predictable results to be achieved as the gold standard. Confocal microscopy is recommended for surface examinations of double crowns.

京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第22367号 / 医博第4608号 / 新制||医||1043(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 戸口田 淳也, 教授 妻木 範行, 教授 安達 泰治 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM

This work deals with problems related with detection and measuring of the ionisated radiation. First part of this work is devoted to theoretical problems of detection, particulary to measuring with Geiger Muller tubes. Second part of the work contains proposal of electronical circuit using Geiger Muller tube as well as description of results experimentally acquired while using the detector, which was manufactured according to the proposed scheme. On the basis of those results it appears that proposed apparatus can be used for significant indication range extension.

Cette thèse consiste en une étude comparative des propriétés thermomécaniques de composites tissés à matrice thermoplastique (PEEK ou PPS) et thermodurcissable (époxy). Une analyse bibliographique a permis la comparaison les comportements des ces stratifies en fonction de la nature de la matrice, de la sollicitation et des conditions environnementales. Une étude expérimentale a conduit à une base de données des trois matériaux sous diverses sollicitations mécaniques (essais monotones élémentaires et structures) et différentes conditions environnementales (température et V.H.). Des essais sur assemblages boulonnes (simple et double recouvrement) ont également été réalisés. Une technique de mesure de champ par corrélation d’images numériques a permis d'étudier le comportement de stratifies troues. Enfin, un modèle de comportement élastoplastique orthotrope de stratifies tisses a matrice thermoplastique a été implémenté dans le code E.F. cast3m et valide pour différentes températures. / This PhD thesis consists in a comparative study of the thermomechanical properties of woven plies composites with a thermoplastic (PEEK or PPS) or a thermosetting (epoxy) matrix. A literature review allowed the comparison between the behaviors of these laminates depending on the matrix nature, the stress state and the environmental conditions. An experimental study led to a database of the three materials for different mechanical loads (monotonic and structural tests) under specific environmental conditions (temperature and wet ageing). Bolted joints tests (single bolt single lap and double lap) have also been performed. A digital pictures correlation technique permitted to study the behavior of circular notched laminates. At last, a model of orthotropic elastoplastic behavior for woven plies laminates with a thermoplastic matrix has been implemented in the F.E. code cast3m and has been validated for different temperatures.