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首页> 外文会议>AMD-vol.256; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20051105-11; Orlando,FL(US) >SIMULATION OF MECHANICAL PROPERTIES OF WOVEN FABRIC LAMINATED COMPOSITE PLATES AT GIVEN DAMAGE STATE
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SIMULATION OF MECHANICAL PROPERTIES OF WOVEN FABRIC LAMINATED COMPOSITE PLATES AT GIVEN DAMAGE STATE

机译：给定损伤状态下机织织物层合复合材料板力学性能的模拟

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摘要

Accurate assessment of cumulative damage of composite structures subjected to aggressive loadings depends strongly on faithful characterization of the microstructures and the underlying deformation phenomena. The stress and strain fields predicted at a global structural level are unable to determine the damage and failure mechanisms at the constituent level and the resulting stiffness degradation. To establish a mapping relation between the global and constituent response parameters, a four-cell micromechanics model (CELLMAT) is developed for an unbalanced weave subjected to a thermal-mechanical loading. The damaged ply properties resulting from a constituent failure are then propagated into a general purpose laminator (VAPAS). The integration of CELLMAT and VAPAS provides an efficient and accurate material translator for a commercial finite element solver in 1) computing the smeared element properties from a given constituent damage; and 2) determining the constituent response parameters for the mechanism driven failure prediction and the subsequent material degradation.
机译：精确评估复合材料结构受到侵略性载荷的累积破坏在很大程度上取决于对微观结构和潜在变形现象的忠实表征。在整体结构水平上预测的应力场和应变场无法确定组成水平上的破坏和破坏机理以及所导致的刚度退化。为了建立全局响应参数和组成响应参数之间的映射关系，针对经受热机械载荷的不平衡编织，开发了四单元微力学模型（CELLMAT）。然后，由组分故障导致的层板损坏特性会传播到通用覆膜机（VAPAS）中。 CELLMAT和VAPAS的集成为商业有限元求解器提供了一种高效，准确的材料转换器，其特点是：1）计算给定成分损伤下的拖尾元素特性； 2）确定用于机构驱动的故障预测和随后的材料退化的组成响应参数。

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