Low Cycle Fatigue Damage Mode of Polymers uncer Stree Control

武艳霞; 陈维毅; 崔东亮

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Low Cycle Fatigue Damage Mode of Polymers uncer Stree Control

更新时间：2026-09-14

- Low Cycle Fatigue Damage Mode of Polymers uncer Stree Control
- 高分子材料应力控制下的低周疲劳损伤模型
- Issue 5, Pages: 390-393(2007)
- 作者机构：
  
  1. 太原理工大学工程力学系
  2. 太原理工大学采矿工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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武艳霞, 陈维毅, 崔东亮. Low Cycle Fatigue Damage Mode of Polymers uncer Stree Control[J]. 2007, (5): 390-393.
DOI：

武艳霞, 陈维毅, 崔东亮. Low Cycle Fatigue Damage Mode of Polymers uncer Stree Control[J]. 2007, (5): 390-393. DOI：

摘要

采用连续损伤力学方法

在著名的王-楼模型的基础上

充分考虑了高分子材料的循环软化特性

得到了高分子材料三轴应力场中的低周疲劳损伤模型.由该模型可知:应力控制的低周疲劳中

循环软化现象表现为平均应变随循环数增加而增加

材料的损伤包括循环塑性损伤和由随循环数增加的平均应变引起的蠕变损伤

同时得到了三轴应力场中的疲劳失效准则和损伤演化方程.

Abstract

Based on Wang-Lou's model

a method of continuous damage mechanics is used to get the low cycle fatigue damage model of polymers under triaxiality stresses with the consideration of the cyclic softening of polymer. According to the model

the phenomena of cyclic softening manifests that mean strain is increased with the increasing of the number of cycles in the low cycle fatigue under the stress control.Low cyclic fatigue damage consists of the cyclic plastic damage and the creep damage caused by the mean strain as a result of the increasing of the number of cycles.Fatigue failure criterion and damage evolution equation describing the effect of triaxial stress constraint are obtained.

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references

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程光旭.复合材料疲劳损伤演化的两阶段模型[J].机械工程材料,2000,24(5):1-4.Cheng Guangxu.A general two stage model for accumulation of fatigue damage in composite materials[J].Materialsfor Mechanical Engineering,2000,24(5):1-4.(in Chinese)

李志军,程光旭.一种纤维增强复合材料的力学化学疲劳模型[J].西安交通大学学报,2002,36(5):90-93.Li Zhijun,Cheng Guangxu.New mechano-chemical fatigue model for fiber reinforced composites[J].Journal of Xi′an JiaoTong University,36(5):90-93.

Wang T J,Lou Z W.A continuum damage model for weld heat affected zone under low cycle fatigue loading[J].Engineering Fracture Mechanics,1990,37(4):825-829.

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