This paper presents the details of a methodology for predicting the thermoelastic properties degradation in general symmetric laminates with uniform ply cracks in some or all of the 90° layers. First, a stress transfer method is derived by using the concept of state space equation. The laminate can be subjected to any combination of in-plane biaxial and shear loading, and the uniform thermal loading is also taken into account. The method takes into account all independent material constants and guarantees continuous fields of all interlaminar stresses across interfaces between material layers. By this method, a laminate may be composed of an arbitrary number of monoclinic layers and each layer may have different material property and thickness. Second, the concept of the effective thermoelastic properties of a cracked laminate is introduced. Based on the numerical solutions of specially designed loading cases, the effective thermoelastic constants of a cracked laminate can be obtained. Finally, the applications of the methodology are shown by numerical examples and compared with numerical results from other models and experiment data in the literature. It is found that the theory provides good predictions of the thermoelastic properties degradation in general symmetric laminates.

Submitted by Rafael da Rocha Mendonça Bacciotti (rafael.bacciotti@gmail.com) on 2017-08-13T23:42:30Z No. of bitstreams: 1 Rafael Bacciotti_defesa.pdf: 1094193 bytes, checksum: 7a7f6313d22efa00eb4133077c507ec5 (MD5) / Rejected by Joana Martorini (joana.martorini@fgv.br), reason: Falta a ficha catalográfica. on 2017-08-14T13:23:19Z (GMT) / Submitted by Rafael da Rocha Mendonça Bacciotti (rafael.bacciotti@gmail.com) on 2017-08-21T18:34:28Z No. of bitstreams: 1 Rafael Bacciotti_final.pdf: 959318 bytes, checksum: a65761f39f40377669fe2d34280903ab (MD5) / Approved for entry into archive by Joana Martorini (joana.martorini@fgv.br) on 2017-08-21T18:55:31Z (GMT) No. of bitstreams: 1 Rafael Bacciotti_final.pdf: 959318 bytes, checksum: a65761f39f40377669fe2d34280903ab (MD5) / Made available in DSpace on 2017-08-22T12:21:28Z (GMT). No. of bitstreams: 1 Rafael Bacciotti_final.pdf: 959318 bytes, checksum: a65761f39f40377669fe2d34280903ab (MD5) Previous issue date: 2017-08-11 / A análise do mercado de trabalho em perspectiva histórica com base em séries de alta frequência no Brasil é uma tarefa desafiadora, pois não há uma pesquisa longa, abrangente e ao mesmo tempo compatível em termos metodológicos e conceituais que permita acompanhar o desempenho das diversas variáveis de maneira adequada. Essas questões foram exacerbadas no início de 2016, quando a Pesquisa Mensal de Emprego (PME) foi interrompida pelo IBGE. Desde então, a Pesquisa Nacional por Amostra de Domicílios Contínua (PNAD Contínua) passou a ser a única referência do instituto sobre o mercado de trabalho em alta frequência. Nesse contexto, este trabalho tem como objetivo retroagir a taxa de desemprego trimestral da Pesquisa Nacional por Amostra de Domicílios Contínua (PNAD Contínua), iniciada em março de 2012. Duas séries foram geradas com base na metodologia de modelos de espaço de estados e o filtro de Kalman: a primeira iniciada em 1976 e outra em 1984, utilizando-se como referência, nos dois casos, as taxas de desemprego obtidas na PNAD anual e na Pesquisa de Emprego e Desemprego (PED - Dieese). / The analysis of the labor market in historical perspective in Brazil is a challenging task, since there is not a long, comprehensive and at the same time methodologically and conceptually compatible survey that allows monitoring the performance of the various variables in an appropriate manner. These issues were exacerbated in early 2016, when the Pesquisa Mensal de Emprego (PME) was interrupted by IBGE. Since then, the Pesquisa Nacional por Amostra de Domicílios Contínua (PNAD Contínua) has become the Institute's only reference to the high-frequency labor market monitoring. In this context, the objective of this study is to retropolate the unemployment rate from PNAD Contínua, begun in March 2012. Two series were produced from the state space model methodology, with the Kalman filter, one since 1976 and another since 1984, using as reference the annual PNAD and the Pesquisa de Emprego e Desemprego (PED-Dieese).