复合材料复合型二次强度准则
A NEW QUADRATIC STRENGTH CRITERION FOR FIBER-REINFORCED COMPOSITES
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摘要: 本文用张量不变量,给出单向正轴复合材料二次函数强度准则的一般方程,考虑纤维增强复合材料的两种基本破坏形式,得到适用于纤维增强复合材料的复合型二次强度准则。同现行准则进行验证、比较表明,这种合理准则同试验结果符合较好,也较简单,适合工程应用。Abstract: This paper discucces some current strength criteria for composites.By the use of the stress tensor invariant principle a general strength criterion of the sacond-order power for three-dimensional unidirectional composites is propsed as following: Consdering the basie failure modes of fiber-reinforced composites,a new strength criterion can be derived in the form: where σX is longitudinal stress and σY and σZ are transverse stresses.
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