【作者】 朱亮； 肖毅；

【机构】 同济大学航空航天与力学学院；

【摘要】 纤维增强复合材料在偏轴拉伸/压缩载荷作用下存在明显的非线性力学特性。为满足在工程应用中对建立拉压性能不同纤维复合材料的非线性本构理论的需要,本文将考虑静水压影响的Drucker-Prager屈服准则与各向异性的Hill屈服准则相结合,提出了广义Hill屈服准则,并推广到Sun-Chen的单参数塑性模型中,建立了考虑拉压异性复合材料的非线性统一本构方程。通过试验结果验证所建立模型的有效性及合理性。更多还原

【Abstract】 Fiber reinforced composites generally exhibit different nonlinear response in tension and compression tests.To satisfy the engineering application requirements of establishing nonlinear constitutive theory for composites with different properties in tension and compression,this paper will discuss a generalized Hill yield criterion considering the effect of hydrostatic pressure.Based on this theory,Sun and Chen’s one-parameter plasticity model will be extended to describe the differential nonlinear response of tension and compression for FRP.Finally,through comparison with off-axis experimental results,the accuracy of the proposed model will be discussed.更多还原