极限抗拉强度
材料科学
软化
结构工程
断裂力学
单调函数
拉伸试验
弯曲
复合材料
断裂(地质)
非线性系统
本构方程
有限元法
工程类
数学
数学分析
物理
量子力学
出处
期刊:Heron
日期:1992-01-01
卷期号:37 (1)
被引量:24
摘要
A model based on nonlinear fracture mechanics is presented for the fatigue behavior of plain concrete. The tensile behavior of concrete for a monotonic increasing deformation is described. The softening relation is described and the way the fracture mechanics parameters are influenced by several variables is shown. The behavior of a softening material subjected to a uniaxial tensile test is explained. Based on experimental results, a constitutive model for the crack cyclic behavior of concrete is proposed. The adequacy of the model is shown by numerical simulation of notched beams under 4-point bending. It is shown by experiments, that localization and non-uniform crack opening occurs in tensile fatigue tests just as in monotonic loaded tensile tests.
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