45钢的疲劳裂纹扩展速率及其工程构件的寿命预测OA
Fatigue Crack Growth Rate of 45 Steel and Fatigue Life Prediction of Its Engineering Components
在常温下对调质态和正火态45钢紧凑拉伸试样进行了疲劳裂纹扩展速率试验,并根据Paris公式确定了两种状态试样在稳定扩展阶段的疲劳裂纹扩展速率;分析了含缺陷的45钢工程构件的张开型(Ⅰ型)裂纹尖端的应力强度因子,然后采用损伤容限设计原则,根据断裂力学试验结果计算了构件的疲劳裂纹扩展寿命,并进行了含缺陷45钢构件的动态弯曲疲劳试验,以验证理论推算的合理性.结果表明:正火态45钢的疲劳裂纹扩展速率略大于调质态45钢的;采用损伤容限设计原则估算的含缺陷4…查看全部>>
The fatigue crack growth rate (FCGR) test of 45 steel CT specimens (quenching and tempering condition and normalizing condition) was done at room temperature,and the FCGR equation in the stably expanding stage was determined by Paris formula.The stress intensity factor of open-type (type Ⅰ) crack tip of 45 steel engineering components with defects was analyzed,and then according to the test results of FCGR and using the design method of damage tolerance,the …查看全部>>
郭昭桥;权淑丽;马鸣图
浙江省先进钢铁材料工程技术研究中心,杭州310022浙江省先进钢铁材料工程技术研究中心,杭州310022中国汽车工程研究院,重庆401122
矿业与冶金
45钢疲劳裂纹扩展速率损伤容限设计疲劳寿命预测动态弯曲疲劳试验
45 steelfatigue crack growth ratedamage tolerance designfatigue life predictiondynamic bending fatigue test
《理化检验-物理分册》 2016 (12)
854-858,5
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