Approved for public release; distribution is unlimited / Thermo mechanical modeling and simulation of a satellite and intercontinental ballistic missile assumes importance due to the increased interest in assessing the potential of such attacks. Effective and innovative methods are sought in assessing the structural integrity of such structural components. In this study, we present modeling and simulation aspects of two generic models loaded by high energy laser beam. We present an application of MSC software in modeling thermo-mechanical behavior, both steady state and transient behavior of satellite and missile structures. Thermal energies used for simulation correspond to high energy laser flux available at low earth orbits as reported in literature. A brief review of the concepts involved is outlined. The analysis is performed under several scenarios that include thermal failures due to steady state as well as transient thermal exposures. The thermal exposure times and locations are varied to assess typical failure modes of the structure. Analysis is done in order to define suitable material thicknesses that will make a satellite or a ballistic missile hardened enough to withstand these specific amounts of energy. Other parameters of interest pertaining to this study are the pulse width, and resulting transient phenomena affecting the behavior. Temperature gradients as well as resulting thermal stresses and thermal deformations are reported in this study. / Outstanding Thesis

Thesis--School of Advanced Airpower Studies, Maxwell Air Force Base, Ala., 1993-94. / Title from title screen (viewed Nov. 5, 2003). "October 1995." Includes bibliographical references.

Orientador: Reginaldo Mattar Nasser / Resumo: A proliferação de armamentos nucleares representa um problema ainda não solucionado na agenda de segurança internacional, e está intimamente relacionada à proliferação de mísseis balísticos. A literatura sobre este tópico contém diferentes hipóteses sobre o que causa a proliferação, as quais podem ser distinguidas entre aquelas que se referem à demanda que os Estados têm por esses armamentos e aquelas que enfatizam o papel da oferta, ou seja, da facilidade de acesso à tecnologia sensível através da cooperação civil internacional. Nesta pesquisa, investigamos o papel de diferentes elementos sobre as decisões dos Estados de adquirirem, ou não, armamentos nucleares e mísseis balísticos, contrapondo as forças relacionadas à demanda e à oferta. Através de uma análise quantitativa, identificamos algumas correlações relevantes, com destaque para a importância da insegurança como uma força motriz da proliferação e a aparente irrelevância do acesso à tecnologia através de acordos de cooperação internacional. A partir de nossa análise estatística, selecionamos o caso da não-aquisição canadense como objeto para uma investigação mais detida, em que confirmamos a importância do contexto de segurança e o papel marginal do acesso à tecnologia, além de identificarmos uma influência de aspectos identitários sobre a decisão de não-aquisição. Diante disso, concluímos que os fatores relativos à demanda têm impacto muito superior sobre a proliferação do que fatores relacionados à oferta. / Abstract: Nuclear weapons proliferation represents a yet unsolved problem in the international security agenda, and it is intimately related to ballistic missile proliferation. Specialized literature on this topic contains different hypotheses about what causes proliferation, which can be distinguished between those that refer to states’ demand for these weapons, and those that emphasize the role of supply, represented by states’ access to sensitive technology through international civil cooperation. In this research, we investigate the role that different factors play in influencing states’ decision to acquire or relinquish nuclear weapons and ballistic missiles, and we contrapose forces related to demand and supply. Through a quantitative analysis, we identify some relevant correlations, among which the relevance of insecurity as a driving force of proliferation and the apparent irrelevance of access to technology through international cooperation are particularly noteworthy. From our statistical analysis, we select the case of Canadian non-acquisition to be the object of more detained investigation, through which we confirmed the importance of the security context and the marginal role of access to technology, besides identifying an influence of identity aspects on the non-acquisition policy. In light of this, we conclude that factors relating to demand have a far larger impact on proliferation than factors relating to supply. / Resumen: La proliferación de armamentos nucleares representa un problema que todavía no tiene solución en la agenda de seguridad internacional, y que está íntimamente relacionado a la proliferación de mísiles balísticos. La literatura acerca de este tópico contiene distintas hipótesis sobre lo que causa la proliferación, que pueden ser distinguidas entre las que se refieren a la demanda de los Estados por eses armamentos, y las que enfatizan el papel de la oferta, o sea, la facilidad de acceso a tecnología sensible a través de la cooperación civil internacional. En esta pesquisa, investigamos el papel de distintos elementos sobre la decisión de los Estados de adquirieren, o no, los armamentos nucleares y los mísiles balísticos, haciendo un contrapunto entre las fuerzas relacionadas a la demanda e a la oferta. A través de un análisis cuantitativo, identificamos algunas correlaciones relevantes, con destaque para la importancia de la inseguridad como una fuerza motriz de la proliferación y la aparente irrelevancia del acceso a tecnología por acuerdos de cooperación internacional. A partir de nuestro análisis estadístico, seleccionamos el caso de la no-adquisición canadiense como objeto para una investigación más detenida, en la cual confirmamos la importancia el contexto de seguridad y el papel marginal del acceso a la tecnología, además de identificamos una influencia de aspectos identitarios sobre la decisión de no-adquisición. Frente a eso, concluimos que los factores relativos a la ... (Resumen completo clicar acceso eletrônico abajo) / Doutor

Submitted by RAQUEL DE BESSA GONTIJO DE OLIVEIRA null (raquelbgontijo@gmail.com) on 2018-03-03T14:17:45Z No. of bitstreams: 1 Tese de doutorado - Raquel de Bessa Gontijo de Oliveira.pdf: 2199485 bytes, checksum: 7175c3b6adf14970ba69328f64b9f2e2 (MD5) / Approved for entry into archive by Satie Tagara (satie@marilia.unesp.br) on 2018-03-05T17:45:19Z (GMT) No. of bitstreams: 1 oliveira_rbg_dr_mar.pdf: 2199485 bytes, checksum: 7175c3b6adf14970ba69328f64b9f2e2 (MD5) / Made available in DSpace on 2018-03-05T17:45:19Z (GMT). No. of bitstreams: 1 oliveira_rbg_dr_mar.pdf: 2199485 bytes, checksum: 7175c3b6adf14970ba69328f64b9f2e2 (MD5) Previous issue date: 2018-02-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A proliferação de armamentos nucleares representa um problema ainda não solucionado na agenda de segurança internacional, e está intimamente relacionada à proliferação de mísseis balísticos. A literatura sobre este tópico contém diferentes hipóteses sobre o que causa a proliferação, as quais podem ser distinguidas entre aquelas que se referem à demanda que os Estados têm por esses armamentos e aquelas que enfatizam o papel da oferta, ou seja, da facilidade de acesso à tecnologia sensível através da cooperação civil internacional. Nesta pesquisa, investigamos o papel de diferentes elementos sobre as decisões dos Estados de adquirirem, ou não, armamentos nucleares e mísseis balísticos, contrapondo as forças relacionadas à demanda e à oferta. Através de uma análise quantitativa, identificamos algumas correlações relevantes, com destaque para a importância da insegurança como uma força motriz da proliferação e a aparente irrelevância do acesso à tecnologia através de acordos de cooperação internacional. A partir de nossa análise estatística, selecionamos o caso da não-aquisição canadense como objeto para uma investigação mais detida, em que confirmamos a importância do contexto de segurança e o papel marginal do acesso à tecnologia, além de identificarmos uma influência de aspectos identitários sobre a decisão de não-aquisição. Diante disso, concluímos que os fatores relativos à demanda têm impacto muito superior sobre a proliferação do que fatores relacionados à oferta. / Nuclear weapons proliferation represents a yet unsolved problem in the international security agenda, and it is intimately related to ballistic missile proliferation. Specialized literature on this topic contains different hypotheses about what causes proliferation, which can be distinguished between those that refer to states’ demand for these weapons, and those that emphasize the role of supply, represented by states’ access to sensitive technology through international civil cooperation. In this research, we investigate the role that different factors play in influencing states’ decision to acquire or relinquish nuclear weapons and ballistic missiles, and we contrapose forces related to demand and supply. Through a quantitative analysis, we identify some relevant correlations, among which the relevance of insecurity as a driving force of proliferation and the apparent irrelevance of access to technology through international cooperation are particularly noteworthy. From our statistical analysis, we select the case of Canadian non-acquisition to be the object of more detained investigation, through which we confirmed the importance of the security context and the marginal role of access to technology, besides identifying an influence of identity aspects on the non-acquisition policy. In light of this, we conclude that factors relating to demand have a far larger impact on proliferation than factors relating to supply. / La proliferación de armamentos nucleares representa un problema que todavía no tiene solución en la agenda de seguridad internacional, y que está íntimamente relacionado a la proliferación de mísiles balísticos. La literatura acerca de este tópico contiene distintas hipótesis sobre lo que causa la proliferación, que pueden ser distinguidas entre las que se refieren a la demanda de los Estados por eses armamentos, y las que enfatizan el papel de la oferta, o sea, la facilidad de acceso a tecnología sensible a través de la cooperación civil internacional. En esta pesquisa, investigamos el papel de distintos elementos sobre la decisión de los Estados de adquirieren, o no, los armamentos nucleares y los mísiles balísticos, haciendo un contrapunto entre las fuerzas relacionadas a la demanda e a la oferta. A través de un análisis cuantitativo, identificamos algunas correlaciones relevantes, con destaque para la importancia de la inseguridad como una fuerza motriz de la proliferación y la aparente irrelevancia del acceso a tecnología por acuerdos de cooperación internacional. A partir de nuestro análisis estadístico, seleccionamos el caso de la no-adquisición canadiense como objeto para una investigación más detenida, en la cual confirmamos la importancia el contexto de seguridad y el papel marginal del acceso a la tecnología, además de identificamos una influencia de aspectos identitarios sobre la decisión de no-adquisición. Frente a eso, concluimos que los factores relativos a la demanda tienen un impacto muy superior sobre la proliferación que los factores relativos a la oferta.

Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2018-03-21T12:11:30Z No. of bitstreams: 1 Raquel de Bessa Gontijo de Oliveira.pdf: 2010350 bytes, checksum: 3bb9fd16aab66146e3196022202d4a1c (MD5) / Made available in DSpace on 2018-03-21T12:11:32Z (GMT). No. of bitstreams: 1 Raquel de Bessa Gontijo de Oliveira.pdf: 2010350 bytes, checksum: 3bb9fd16aab66146e3196022202d4a1c (MD5) Previous issue date: 2018-02-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Nuclear weapons proliferation represents a yet unsolved problem in the international security agenda, and it is intimately related to ballistic missile proliferation. Specialized literature on this topic contains different hypotheses about what causes proliferation, which can be distinguished between those that refer to states’ demand for these weapons, and those that emphasize the role of supply, represented by states’ access to sensitive technology through international civil cooperation. In this research, we investigate the role that different factors play in influencing states’ decision to acquire or relinquish nuclear weapons and ballistic missiles, and we contrapose forces related to demand and supply. Through a quantitative analysis, we identify some relevant correlations, among which the relevance of insecurity as a driving force of proliferation and the apparent irrelevance of access to technology through international cooperation are particularly noteworthy. From our statistical analysis, we select the case of Canadian non-acquisition to be the object of more detained investigation, through which we confirmed the importance of the security context and the marginal role of access to technology, besides identifying an influence of identity aspects on the non-acquisition policy. In light of this, we conclude that factors relating to demand have a far larger impact on proliferation than factors relating to supply / A proliferação de armamentos nucleares representa um problema ainda não solucionado na agenda de segurança internacional, e está intimamente relacionada à proliferação de mísseis balísticos. A literatura sobre este tópico contém diferentes hipóteses sobre o que causa a proliferação, as quais podem ser distinguidas entre aquelas que se referem à demanda que os Estados têm por esses armamentos e aquelas que enfatizam o papel da oferta, ou seja, da facilidade de acesso à tecnologia sensível através da cooperação civil internacional. Nesta pesquisa, investigamos o papel de diferentes elementos sobre as decisões dos Estados de adquirirem, ou não, armamentos nucleares e mísseis balísticos, contrapondo as forças relacionadas à demanda e à oferta. Através de uma análise quantitativa, identificamos algumas correlações relevantes, com destaque para a importância da insegurança como uma força motriz da proliferação e a aparente irrelevância do acesso à tecnologia através de acordos de cooperação internacional. A partir de nossa análise estatística, selecionamos o caso da não-aquisição canadense como objeto para uma investigação mais detida, em que confirmamos a importância do contexto de segurança e o papel marginal do acesso à tecnologia, além de identificarmos uma influência de aspectos identitários sobre a decisão de não-aquisição. Diante disso, concluímos que os fatores relativos à demanda têm impacto muito superior sobre a proliferação do que fatores relacionados à oferta

A new class of materials, known as multi-functional energetic structural materials (MESMs), has been developed. These materials possess both strength and energetic functionalities, serving as candidates for many exciting applications. One of such applications is ballistic missiles, where these materials serve as part of structural casing as well as explosive payload. In this study, the dynamic compressive behavior of two types of MESMs in the intermediate strain rate regime is investigated. The first type is a thermite mixture of Al and Fe₂O₃ particles suspended in an epoxy matrix. The second type is a shock compacted mixture of Ni and Al powders. Compression experiments on a split-Hopkinson pressure bar (SHPB) apparatus are carried out at strain rates on the order of 103 s-1. In addition, a novel method for investigating the dynamic hardness of the Al + Fe₂O₃ + Epoxy materials is developed. In this method, high-speed digital photography is used to obtain time-resolved measurements of the indentation diameter throughout the indentation process. Experiments show that the shock compacted Ni-Al material exhibits a rather ductile behavior and the deformation of the Al + Fe₂O₃ + Epoxy mixtures is dominated by the polymer phase and significantly modulated by the powder phases. The pure epoxy is ductile with elastic-plastic hardening, softening, and perfectly plastic stages of deformation. The Al and Fe₂O₃ particles in Al + Fe₂O₃ + Epoxy mixtures act as reinforcements for the polymer matrix, impeding the deformation of the polymer chains, alleviating the strain softening of the glassy polymer matrix at lower levels of powder contents (21.6 - 29.2% by volume), and imparting the attributes of strain hardening to the mixtures at higher levels of powder contents (21.6 - 49.1% by volume). Both the dynamic and quasi-static hardness values of the Al + Fe₂O₃ + Epoxy mixtures increase with powder content, consistent with the trend seen in the stress-strain curves. To quantify the constitutive behavior of the 100% epoxy and the Al + Fe₂O₃ + Epoxy materials, the experimentally obtained stress-strain curves are fitted to the Hasan-Boyce model. This model uses a distribution of activation energies to characterize the energy barrier for the initiation of localized shear transformations of long chain polymeric molecules. The results show that an increase in powder content increases the activation energy, decreases the number of transformation sites, causes redistribution of applied strain energy, and enhances the storage of inelastic work. These effects lead to enhanced strength and strain hardening rate at higher levels of powder content.

No description available.

北韓研發核武與彈道飛彈對東北亞區域安全造成嚴重衝擊，自1994年以來的北韓核武危機至今仍未獲得解決。在2002年北韓承認持續發展核武後，中共在核武危機中擔任調解人的角色，分別舉行了「三方會談」以及六輪「六方會談」。中共希望透過多邊主義中的談判方式，和平地解決北韓核武發展問題，並提高自身在朝鮮半島議題上以及國際社會中的影響力。但北韓至今仍未放棄核武發展，且從2006年以來一連串的核子試爆、長程火箭與飛彈試射使東北亞安全情勢極度惡化。 平心而論，中共目前是世界上對北韓影響力最大的國家。除了因為韓戰所建立的傳統「血盟關係」，以及在1961年兩國之間所締結之「中朝友好合作互助條約」之外，近年來，中共也提供北韓大量的經濟援助，包括糧食、重油與其他的戰略性物資。但北韓自2006年以來的彈道飛彈試射與地下核武試爆，確實已經對中共的國家安全造成嚴重威脅。北韓研發核武的問題若不解決，將會動搖現行「核不擴散」機制的權威與可信度，甚至造成東北亞區域各國，例如日本、韓國，甚至台灣競相研發核武的可能性，進而引發區域軍備競賽與核武擴散，對中共的國家安全造成損害。其次為北韓研發核武若引起美國的軍事先制攻擊，其難民問題對中共東北邊境所造成的威脅。最後則是北韓的核武研發與常規軍力對中共所造成的直接威脅。此外，北韓研發核武也對中共在於1996年出台之「新安全觀」造成衝擊，尤其中共官方在未來評估東北亞區域安全問題時，勢必將對「新安全觀」作一定程度的修正。在中共的綜合國力以及在亞太地區影響力不斷提升的前提下，中共將藉由北韓這根國際政治權力槓桿，與美國共同形塑未來朝鮮半島的全新權力格局。本研究即欲探討做為北韓傳統支持者與核武危機調停者的中共，如何處理北韓研發核武對其國家安全所造成之威脅。 關鍵詞：中共、朝鮮半島、北韓核武危機、新安全觀、彈道飛彈、軍備競賽 / North Korea developed nuclear weapons and ballistic missiles pose a serious impact on Northeast Asia, since 1994 the North Korean nuclear crisis has yet to be resolved. North Korea admitted in 2002, continued to develop nuclear weapons, PRC in the nuclear crisis as a mediator, were held “tripartite talks” and “six-party talks.”PRC hopes of multilateralism in the negotiation and peaceful resolution of North Korea's nuclear issue and improve their own issues on the Korean peninsula and the international community's influence. But North Korea has yet to give up nuclear weapons development and since 2006 a series of nuclear tests, long-range rocket and ballistic missile launch to worsen the security situation in Northeast Asia. In all fairness, the PRC is currently the world's greatest influence on North Korea's state. Apart from the tradition established by the Korean War "clan relations", as well as between the two countries in 1961, concluded the “Sino-Korean friendship and cooperation treaty”, the recent years, and that China provides North Korea substantial economic aid, including food, heavy oil and other strategic materials. But North Korea since 2006 ballistic missile and nuclear test pose a serious threat to national security of PRC. This study anticipates exploring the trend and change of the Korean Peninsula Policy and New Security Concept of PRC. The main research goal: to discuss North Korea`s traditional supporter and mediator, PRC, and how to handle North Korea's development of nuclear weapons posed to their own national security threats. Keyword: PRC, Korean Peninsula, North Korea Nuclear Crisis, New Security Concept, Ballistic Missiles, the Arms Race.