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本报告广泛阐述了基体控制材料的非线性在复合材料结构分析中的应用。人们很少注意承受拉伸载荷时的复合材料由于其纤维变形硬化材料非线性导致的复合材料非线性。由于纤维从变形到破坏的现象增多,这种影响就变得更重要。本研究的主要目的是评定单层纤维和树脂基材料的非线性在预测复合材料压力容器对内部压力载荷响应中的适用性和改进的精确度。将受压复合材料容器的分析计算和测量的应变响应的结果进行的比较表现出一致性,而线性和非线性分析反映出很小的差异。对每一单层非线性组分的影响的深入观察可以看出线性分析会在纤维增强效应和单层基体控制材料非线性减弱效应之间产生一平均结果,此外,对结果的评定表明单层纤维控制的非线性和单层平面剪切非线性对精确预估压力容器响应起最重要的作用。单层横向非线性(E_(22))的重要性不太明显,因为这种非线性主要取决于分析中所包含的破坏模型的类型。
This report extensively expounds the application of the nonlinearity of matrix-controlled materials in the structural analysis of composite materials. There is little attention paid to the composite nonlinearity of composite materials under tensile load due to the nonlinearity of their fiber-set hardened materials. This effect becomes even more important as the fiber increases from deformation to destruction. The main objective of this study was to assess the applicability and improved accuracy of the nonlinearity of monolayer fiber and resin-based materials in predicting the response of composite pressure vessels to internal pressure loads. Comparisons of the results of the analytical calculations and the measured strain responses of the pressurized composite container show consistency, while linear and non-linear analyzes reflect small differences. An in-depth examination of the effect of each monolayer nonlinear component shows that a linear analysis produces an average result between the fiber reinforcement effect and the non-linear weakening effect of the monolayer matrix control material. In addition, the evaluation of the results shows that the monolayer Fiber-controlled nonlinear and monolayer planar shear nonlinearities play the most important role in accurately predicting pressure vessel response. The importance of a single lateral transversal nonlinearity (E_ (22)) is less obvious, as this nonlinearity mainly depends on the type of damage model involved in the analysis.