Constitutive relation, deformation, failure and strength of composites reinforced with continuous/short fi bers or particles
Constitutive relation, deformation, failure and strength of composites reinforced with continuous/short fi bers or particles
复制标题
连续/短纤维或颗粒增强复合材料的本构关系、变形、失效和强度
DOI：
10.1016/j.compstruct.2020.113279
复制
发表时间：
2021-03-02
影响因子：
6.3
通讯作者：
Huang, Zheng-Ming
中科院分区：
文献类型：
--
作者：
Huang, Zheng-Ming
Various issues on the constitutive relation, deformation, failure, and strength of a composite reinforced with either continuous or short fibers, or particles are systematically addressed based on Bridging Model and the true stress concept. The internal stresses in the fiber (standing for the reinforcement) and matrix obtained by Bridging Model or any other micromechanics model are homogenized quantities. They must be converted into true values. The conversion details are summarized in the paper. A constitutive relation of the composite outside an elastic region is affected by constituent plasticity, true stress effect and relative slippage displacement between debonded fiber and matrix interfaces, and has been established in the paper. Using the true stresses, various composite failures including ultimate strengths of a laminated composite can be predicted mainly against the fiber and matrix properties. Only the prediction for a processing dependent failure, either interface debonding, laminate delamination or fiber kinking failure, needs additionally an ultimate data of a unidirectional laminate measured upon existing standards. One of the best advantages of this paper is in that probably a minimum effort is needed to prepare the input data for a composite design. Another advantage is in that all of the involved formulae are analytical and in closed form, making the analysis for a composite structure comparable in computational amount to that made of an isotropic material.
