A model of continuum damage mechanics for high cycle fatigue of metallic materials  

一个金属材料高周疲劳损伤力学模型(英文)

作　　者：张亮[1] 刘雪松[1] 王林森[1,2] 吴双辉 方洪渊[1] 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [2]东方锅炉股份有限公司工艺部焊接室,自贡643001

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第11期2777-2782,共6页中国有色金属学报（英文版）

摘　　要：A non-linear continuum damage model was presented based on the irreversible thermodynamics framework developed by LEMAITRE and CHABOCHE. The proposed model was formulated by taking into account the influence of loading frequency on fatigue life. The parameters H and c are constants for frequency-independent materials, but functions of cyclic frequency for frequency-dependent materials. In addition, the expression of the model was discussed in detail at different stress ratios （R）. Fatigue test data of AlZnMgCu1.5 aluminium alloy and AMg6N alloy were used to verify the proposed model. The results showed that the model possesses a good ability of predicting fatigue life at different loading frequencies and stress ratios.基于不可逆热力学提出一个新的高周疲劳损伤力学模型,该模型考虑载荷频率对疲劳寿命的影响。模型中的参数H和c对于无频率效应的材料是常数,而对于有频率效应的材料则是与频率有关的函数。同时,讨论了不同应力比时模型的表达形式。利用AlZnMgCu1.5和AMg6N两种材料在不同频率下的疲劳实验数据验证提出的模型。结果表明,该模型能够准确预测材料在不同加载频率和应力比条件下的疲劳寿命。

关 键 词：AlZnMgCu1.5 alloy AMg6N alloy continuum damage model CY 

分 类 号：TG113.255[金属学及工艺—物理冶金]