摘要
针对0Cr18Ni9不锈钢薄板焊接接头,开展了高周疲劳性能测试,研究了应力比对其疲劳极限和疲劳寿命S-N曲线的影响。结果表明应力比对疲劳寿命有较大的影响,在最大应力一定的情况下,应力比越大其疲劳寿命越大。基于试验结果,得到了反映应力比影响的0Cr18Ni9不锈钢薄板焊接接头Goodman修正和Walker修正的高周疲劳寿命预测模型。模型的预估寿命和试验数据对比表明,Walker修正模型对疲劳寿命的预测结果全部处于1.0倍分散带以内,其更能反映应力比对0Cr18Ni9不锈钢薄板焊接接头疲劳寿命的影响。
High-cycle fatigue tests were carried out to investigate the effects of stress ratio on the fatigue ultimate strength and S-N fatigue life for 0Cr18Ni9 stainless steel welded joints. The results show that the fatigue life increases with stress ratio under the given maximum stress. Based on the tests results,the Goodman and Walker high-cycle fatigue life prediction models are obtained to reflect the effects of stress ratio. And the comparison also reveals that the Walker model predicted life coincides with the tests data better than Goodman model with the fact that the former models′ data distributes on the more narrow band.
作者
董鹏鹏
贺启林
王海洲
王儒文
杨燕
DONG Pengpeng;HE Qilin;WANG Haizhou;WANG Ruwen;YANG Yan(Beijing Institute of Astronautical Systems Engineering,Beijing Key Laboratory of Cryogenic Technology Research,Beijing 100076)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2022年第5期82-89,共8页
Aerospace Materials & Technology
