Progressive fatigue damage modeling of composite materials, part I: Modeling
Progressive fatigue damage modeling of composite materials, part I: Modeling
复制标题
DOI：
10.1106/ncnx-dxp1-jt6a-e49e
复制
发表时间：
2000-01-01
影响因子：
2.9
通讯作者：
Lessard, LB
中科院分区：
文献类型：
--
作者：
Shokrieh, MM;Lessard, LB
本研究建立了一种模拟复合材料层合板疲劳行为的建模技术--渐进疲劳损伤模型。该模型能够模拟具有任意几何形状和铺层顺序的复合材料层合板在复杂疲劳载荷条件下的剩余刚度、剩余强度和疲劳寿命。该模型是一个集成的三个主要组成部分：应力分析，失效分析，和材料性能退化规则。一个三维的，非线性的，有限元技术开发的应力分析。通过在应力集中边缘和层间界面处采用大量单元，考虑了边缘效应。每个单元被认为是正交各向异性材料在多轴应力状态。利用每个单元内的三维应力状态，通过一组疲劳失效准则检测在多轴应力状态下单向铺层的不同失效模式。建立了一种分析方法，称为广义剩余材料性能退化技术，用于退化单元的材料性能。这种分析技术并不局限于对有限的外加应力比应用破坏准则。基于该模型，开发了一个计算机程序，模拟循环下的疲劳贷款的复合材料层合板的行为。
In this research a modeling technique for simulating the fatigue behaviour of laminated composite materials, with or without stress concentrations, called progressive fatigue damage modeling, is established The model is capable of simulating the residual stiffness, residual strength and fatigue Life of composite laminates with arbitrary geometry and stacking sequence under complicated fatigue loading conditions. The model is an integration of three major components: stress analysis, failure analysis, and material property degradation rules. A three-dimensional, nonlinear, finite element technique is developed for the stress analysis. By using a large number of elements near the edge of the stress concentration and at layer interfaces, the edge effect has been accounted for. Each element is considered to be an orthotropic material under multiaxial state of stress. Using the three-dimensional state of stress within each element, different failure modes of a unidirectional ply under multiaxial states of stress an detected by a set of fatigue failure criteria. An analytical technique, called the generalized residual material property degradation technique, is established to degrade the material properties of elements. This analytical technique is not restricted to the application of failure criteria to limited applied stress ratios. Based on the model, a computer code is developed that simulates cycle-by-cycle behaviour of composite laminates under fatigue lending.