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首页> 外文期刊>International Journal of Solids and Structures >Numerical simulation of fiber reinforced composite materials-two procedures
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Numerical simulation of fiber reinforced composite materials-two procedures

机译：纤维增强复合材料的数值模拟-两种程序

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摘要

In this work, two methodologies for the analysis of unidirectional fiber reinforced composite materials are presented. The first methodology used is a generalized anisotropic large strains elasto-plastic constitutive model for the analysis of multiphase materials. It is based on the mixing theory of basic substance. It is the manager of the several constitutive laws of the different compounds and it allows to consider the interaction between the compounds of the composite materials. In fiber reinforced composite materials, the constitutive behavior of the matrix is isotropic, whereas the fiber is considered orthotropic. So. one of the constitutive model used in the mixing theory needs to consider this characteristic. The non-linear anisotropic theory showed in this work is a generalization of the classic isotropic plasticity theory (A Continuum Constitutive Model to Simulate the Mechanical Behavior of Composite Materials, PhD Thesis. Universidad Politecnica de Cutaluna, 2000). It is based in a one-to-one transformation of the stress and strain spaces by means of a four rank tensor. The second methodology used is based on the homogenization theory. This theory divided the composite material problem into two scales: macroscopic and microscopic scale. In macroscopic level the composite material is assuming as a homogeneous material, whereas in microscopic level a unit volume called cell represents the composite (Tratamiento Numerico de Materiales Compuestos Mediante la teori de Homogeneizacion. PhD Thesis, Universidad Politecnica, de Cataluna 22001). This formulation presents a new point of the homogenization theory in which can be found the equations that relate both scales. The solution is obtained using a coupled parallel code based on the finite elements method for each scale problem. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 30]
机译：在这项工作中，提出了两种用于分析单向纤维增强复合材料的方法。使用的第一种方法是用于分析多相材料的广义各向异性大应变弹塑性本构模型。它基于基本物质的混合理论。它是不同化合物的几种本构定律的管理者，它允许考虑复合材料的化合物之间的相互作用。在纤维增强复合材料中，基体的本构行为是各向同性的，而纤维被认为是正交各向异性的。所以。混合理论中使用的本构模型之一需要考虑这一特性。这项工作中显示的非线性各向异性理论是经典的各向同性可塑性理论的概括（模拟复合材料力学行为的连续本构模型，博士学位论文，波利特纳理工大学，2000年）。它基于通过四阶张量对应力和应变空间进行一对一转换。使用的第二种方法基于均质化理论。该理论将复合材料问题分为两个尺度：宏观尺度和微观尺度。在宏观层面上，假定该复合材料为均质材料，而在微观层面上，则称为单元的单位体积代表该复合材料（Thomamito Numerico de Materiales Compuestos Mediante la teori de Homogeneizacion。PhD Thesis，Universidad Politecnica，de Cataluna 22001）。这种表述提出了均质化理论的新观点，在其中可以找到与两个尺度相关的方程。对于每个比例尺问题，使用基于有限元方法的耦合并行代码获得解决方案。 （C）2002 Elsevier ScienceLtd。保留所有权利。 [参考：30]

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