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Non-linear Elastic Models for Composite Materialsстатья
- Авторы: Lomakin E.V., Fedulov B.N., Antonov F.K., Ushakov A.E., Safonov A.A.
- Сборник: Proceedings of 2014 SIMULIA Community Conference, May 19–22, 2014, Providence, RI
- Серия: SIMULIA Community Conference
- Глава в коллективной монографии
- Год издания: 2014
- Место издания: Dassault Systèmes Simulia, Corp Providence, RI, USA
- Первая страница: 147
- Последняя страница: 154
- Аннотация: Modern composite materials exhibit nonlinear behavior even under the conditions of elastic deformation. Usually shear properties have essentially more non-linearity than the tensile longitudinal or transverse ones almost for all reinforced plastics. For dry textile composites, it is especially important to take into account the shear nonlinearity for the prediction of the deformation characteristics, shape and structure of composite structural members during the draping and the performance of a layup process. Two approaches to take into account composite elastic nonlinearity effect are developed. First one can be used to model different elastic module behavior in the dependence on the type of external forces. Second one is proposed to take into account the nonlinear dependency of shear stress - strain curves. It is demonstrated that different dependencies of shear properties can be used. The elastic potentials and corresponding constitutive equations for both approaches are proposed. Numerical implementation for nonlinear shear model has been performed. One of the possible methods for textile preform draping process simulation is considered.
- Добавил в систему: Ломакин Евгений Викторович