Design of uni-axially loaded components fabricated from tough fibre-reinforced ceramic matrix composites
Design of uni-axially loaded components fabricated from tough fibre-reinforced ceramic matrix composites
复制标题
由坚韧纤维增强陶瓷基复合材料制成的单轴加载组件的设计
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
F. Leckie
中科院分区：
文献类型：
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作者：
S. Haddad;D. Hayhurst;F. Leckie
一个简单的模型的坚韧纤维增强陶瓷基复合材料的应力-应变行为，基于一个单一的连续损伤力学参数，已被用来研究两个运动学确定的，一维，结构的行为。结构已被选定代表一类组件，其中纤维轴重合主要与最大主拉应力方向。结果表明，由于荷载的单调作用，损伤演化导致应力重分布，结构的荷载-位移特性反映了应力-应变曲线的特性。主要承载截面的尺寸影响应力重分布，从而影响载荷-位移曲线的平滑度。基于典型材料和结构概念的近似方法已被开发用于快速预测载荷-位移特性，可用于设计的早期或概念阶段。
A simple model for the stress-strain behaviour of a tough fibre-reinforced ceramic matrix composite, based on a single continuum damage mechanics parameter, has been used to study the behaviour of two kinematically determinate, one-dimensional, structures. The structures have been chosen to represent a class of components in which the fibre axes coincide predominantly with the maximum principal tension stress direction. It has been shown that the damage evolution due to the monotonic application of load results in stress redistribution, and that the load displacement characteristics of the structures reflect the characteristics of the stress—strain curve. The size of the predominant load bearing section influences the stress redistribution and hence the smoothness of the load-displacement curve. Approximate methods, based on the concepts of representative materials and structures, have been developed for the rapid prediction of the load-displacement characteristics which can be used at the early, or conceptual, stages of design.