中国塑料2025，Vol.39Issue(7)：49-55,7.DOI:10.19491/j.issn.1001-9278.2025.07.009
循环载荷法评价聚乙烯管材料耐疲劳失效性能的研究
Study on fatigue failure resistance of polyethylene pipe materials evaluated by cyclic loading method
胡砚磊 1孙晋 1胡法 1武志军 1李玉娥 1吴孝翰1
作者信息
- 1. 中石化(北京)化工研究院有限公司,北京 100013
- 折叠
摘要
Abstract
This study evaluated the fatigue resistance of polyethylene(PE)pipe materials using cracked round bar cyclic loading tests.A systematic investigation was conducted to assess the effects of manufacturing method(compression molding vs.extrusion),specimen geometry,loading parameters(stress range,frequency,load ratio),and temperature on fatigue performance.Results indicated that compression-molded specimens exhibited superior fatigue resistance com-pared to extruded pipes.Fatigue life was significantly influenced by test conditions:(1)increasing specimen diameter re-duced fracture cycles,(2)higher stress ranges reduced fatigue life,with a brittle-ductile transition occurring at 16 MPa,(3)elevated frequencies accelerated failure,(4)increased load ratios improved fatigue resistance,and(5)higher tem-peratures reduced cycle counts.These findings provide critical insights for optimizing PE pipe design and performance un-der cyclic loading conditions.关键词
聚乙烯管材料/疲劳/耐慢速裂纹增长/循环载荷缺口圆棒Key words
polyethylene pipe materials/fatigue/slow crack growth/cyclic loading cracked round bar分类
化学化工引用本文复制引用
胡砚磊,孙晋,胡法,武志军,李玉娥,吴孝翰..循环载荷法评价聚乙烯管材料耐疲劳失效性能的研究[J].中国塑料,2025,39(7):49-55,7.
