摘要
基于单胞解析模型,建立一种从复合材料细观组分到宏观单向板的强度预报方法。根据连续介质力学和均匀化方法构建细-宏观关联矩阵,通过该关联矩阵将细观组分材料的弹性和损伤性能传递到宏观单向板中。考虑复合材料细观损伤状态,当纤维和基体满足各自强度准则时失效,并通过失效因子折算成刚度的衰减。在此基础上,结合有限元分析,实现复合材料单向板纵横向拉伸模拟,从而预报单向板的拉伸强度。结果表明:该方法预报的模量和强度与实验值基本一致,验证了该方法的有效性与高效性。
Based on the unit cell analytic model,a method to predict the strength of unidirectional composites is developed from the micro component of composites.The micro-macro correlation matrix is presented according to the continuum mechanics and homogenization method.The elastic and damage properties of the component phases are passed to unidirectional composites by the micro-macro correlation matrix.Considering the micro damage of component phases,failure arises in the fiber and matrix,when the strength criteria are satisfied.Once the component phases have failed,the stiffness is degraded by the failure factor.On this basis,the simulation of unidirectional composites in the longitudinal and transverse tensilon is achieved to predict the tensile strength of unidirectional composites by combining with finite element analysis.Numerical results show that the predicted modulus and strength of the method in this paper are well fit with experimental results and the strength prediction method for composites is of validity and efficiency.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2010年第5期86-92,共7页
Acta Materiae Compositae Sinica
关键词
复合材料
强度预报
有限元法
单胞解析模型
失效准则
composites
strength prediction
finite element method
unit cell analytic model
failure criteria
