Envirotainer builds containers that are specialized in transporting of temperature sensitive products these containers are customized for airplanes. The containers are then leased to other companies, most often to pharmaceutical companies. Envirotainer are based in Lagga, Knivsta. It is also here where the production of the containers is held. The container RAP T2 was designed in the early 80ies. The RAP T2 contains a fleet of about 1220 containers spread all over the world. This container model needs an update in order to optimize its performance. One of the improvements is achieved by optimizing the UA-value that is too high. A lower UA-value gives the performance of the container more endurance and more stability. Initial testing that was made in the beginning of the project showed that the floor in the container was the biggest stand alone module benefiter of the high UA-value. With that knowledge it was decided that my work should be about the possibility to improve the construction with a new insulation material that would optimize the UA-value. The work started off with an investigation of insulation materials. The most interesting insulation materials were weighted against each other. The result showed that Divinycell was the best insulation material for the design. Then different concepts were made, concept A were the whole floor was redesigned and concept B were an extra insulation module was designed to fit the existing floor. The concepts were weighted against each other in order to choose the final concept. Concept A was the best alternative and was chosen. The concept was then designed in PTC Creo. A prototype was built for UA-value testing. The prototype was then tested and measured against the original container in order to see how much the UA-value was lowered with the new design. And the result of the test showed an improvement of almost 37 %. The UA-value went from 25,40 W/K with the original container design to 16,05 W/K with the prototype design. This shows that an update of the floor design is in order to make the container performance better and more stabile.

The structure and design of truck body work can look in several different ways. SpecialKarosser AB is one of the leading companies in Scandinavia when it comes to specially adapted truck body work. The body works are designed to carry different types of loads. When in use, the structure is affected by various types of forces and repeated dynamic loads. The body works have several constituent parts which includes bottom structure and support frame. SKAB manufactures two types of bottom structures, one fully made of steel and one with sandwich technology.  The purpose of this project was to analyze and compare the two bottom structures based on von Mises stress, weight and deflection at a load of 80 000 N. The project was divided into five different phases that consisted of literature studies, 3D modeling, calculation, evaluation and verification and validation. Surface and solid modeling was performed in Catia V6. FE-analysis was executed in Abaqus and verified with a meshless structural analysis in SIMSOLID. The result was further verified with simplified manual calculations. Lastly a comparative evaluation of the bottom structures was performed. The following conclusions could be drawn from the analysis: the von Mises stress was generally lower in the sandwich bottom structure compared to the steel bottom structure. The cross beams in the steel bottom structure were exposed to von Mises stress of 18.9 MPa. In the sandwich bottom structure, the front end cross beams in the were exposed to a stress of 15.4 MPa and the back end 9.76 MPa. The deflection of the steel structure was 0.34 mm greater compared to the sandwich bottom, this corresponded to approx. 29%. The steel bottom has a 6% lower mass of 849.7 kg compared to 901.6 kg. The results from this study could be used by SKAB for further analysis and environmental-, weight- or cost optimization of the structure. / SpecialKarosser AB (SKAB) är ett av de ledande företagen i Skandinavien när det kommer till specialanpassade lastbilspåbyggnationer. Byggnationerna är designade för att bära olika typer av last. Vid användning påverkas konstruktionerna av olika typer av krafter och upprepad dynamisk belastning. Byggnationerna har flera ingående delar vilka bland annat omfattar bottenkonstruktion och hjälpram. SKAB tillverkar två typer av bottenkonstruktioner, en i stål och en med sandwichteknik.  Syftet med projektet var att analysera och jämföra SKABs två bottentyper utifrån von Mises spänning, vikt och utböjning vid en belastning på 80 000 N. Projektet delades in i fem olika faser som omfattade litteraturstudier, 3D-modellering, beräkning, utvärdering samt verifiering och validering. Yt- och solidmodellering utfördes i Catia V6. FE-analys gjordes i Abaqus och verifierades med en mesh-fri konstruktionsanalys i SIMSOLID. Resultatet verifierades ytterligare med förenklade handberäkningar. Slutligen gjordes en jämförande utvärdering av bottenkonstruktionerna.  Från analysen kunde följande slutsatser dras: von Mises spänning blev generellt lägre i sandwichbotten jämfört med stålbotten. I stålbotten påverkades tväroken av von Mises spänning på 18,9 MPa. I sandwichbotten påverkades de främre tväroken av 15,4 MPa och 9,76 MPa i de bakre tväroken. Stålbotten fick en utböjning som var 0,2 mm större jämfört med sandwichbotten, vilket motsvarade ca 28%. Stålbotten hade en 6% lägre massa på 849,7 kg jämfört med 901,6 kg. Resultaten från denna studie kan användas av företaget för vidare analys samt miljö-, vikt- eller kostnadsmässiga optimeringar av konstruktionerna.