计算力学学报2017，Vol.34Issue(2)：238-243,6.DOI:10.7511/jslx201702017
基于子模型法的带有表面裂纹钢丝应力强度因子研究
Crack stress intensity factor of wire with surface crack based on sub-model method
摘要
Abstract
The crack stress intensity factor is an important parameter for wire fatigue fracture assessment,wire fatigue crack growth analysis and wire fracture strength assessment.In this paper,the crack extension analysis software FRANC3D was introduced firstly,then the stress intensity factor of wire with surface crack was studied under tensile loads based on sub-model simulation method,and the types of cracks include semicircular semicircular crack and linear crack,and the shape correction coefficient expression of stress intensity factor was fitted under tensile loads.The causes of errors by using this formula when evaluating strength were analyzed.The results show that the precision of calculating stress intensity factor is higher compared with the existing research results,and the method had higher calculation speed,and the demand for computer hardware is low,and when the safety performance of cables for cable-supported bridge is evaluated using the stress intensity factor obtained by this method ,the result is more accurate.关键词
钢丝/子模型法/表面裂纹/应力强度因子Key words
wire/sub-model method/surface crack/stress intensity factor分类
交通工程引用本文复制引用
乔燕,缪长青,孙传智..基于子模型法的带有表面裂纹钢丝应力强度因子研究[J].计算力学学报,2017,34(2):238-243,6.基金项目
国家自然科学基金(51078080) （51078080）
江苏省自然科学基金(BK2012562) （BK2012562）
江苏省高校自然科学研究(10KJB58005) （10KJB58005）
宿迁市交通运输科学研究(KY2014-1)资助项目. （KY2014-1）
