(1、北方工業(yè)大學(xué)，北京100041；
2、清華大學(xué)工程力學(xué)系，北京100084)
摘 要: 復(fù)合材料的脆性軟化是影響其結(jié)構(gòu)變形穩(wěn)定性的重要因素之一。考慮軟化后的殘余強度對工程設(shè)計有重要意義，將彈脆塑性本構(gòu)模型引入到復(fù)合材料結(jié)構(gòu)的力學(xué)分析中來，給出了完整的彈脆塑性本構(gòu)積分?jǐn)?shù)值格式及有限元算法。通過對正交各向異性帶孔板的單向拉伸的數(shù)值計算， 顯示出該文的理論和算法能夠恰當(dāng)?shù)胤从硰?fù)合材料結(jié)構(gòu)的脆性行為特性。
關(guān)鍵字: 復(fù)合材料 正交各向異性 彈塑性 脆性軟化 本構(gòu)理論
（）
Abstract:Brittle softening is one of the important factors which affects the deformation stability of the composite structures. Take the residual strength of a softening structure into consideration is of important significance to the engineering design. In this paper, the elasto-brittle-plastic constitutive relationship model has been introduced into the mechanical analysis of the composite structure. The complete numerical scheme of constitutive integration and corresponding algorithm for finite element calculation have been proposed. Numerical calculation has been taken on the elasto-plastic analysis of the orthotropic anisotropy plate with a small hole. The results demonstrated that the theory and algorithm proposed in this paper is suitable to describe the brittle-plastic behavior of the composite structure through the numerical simulation .
Key words: composite material orthotropic anisotropy elasto-lasticity brittle-softening constitutive theory
