哈尔滨工程大学学报2015，Vol.36Issue(10)：1302-1306,5.DOI:10.11990/jheu.201407050
船用Q235钢裂纹扩展速率试验
Crack propagation rate tests of marine steel Q235
摘要
Abstract
Aiming at the fatigue fracture problem occurred in the hull structure, taking the marine steel Q235 as the research object, a series of crack propagation rate tests of compact tension specimens were conducted. A compliance method and a pixel method were introduced to measure the crack length, and the two methods were compared re-spectively in accuracy and stability. The incremental polynomial method of 7 elements and the least square method were applied to fitting and regressing of the crack test data. Then using statistical analysis, the statistical character-istics of crack propagation parameters C and m were obtained. On the basis of probability fracture mechanics theory, the functions of crack propagation rate under different probability standards were presented. In conclusion, this pro-vides a theoretical basis and experimental foundation for the research of crack propagation characteristics and fatigue reliability of complex ship hull structures.关键词
裂纹扩展速率/Q235钢/统计分析/概率断裂力学/疲劳断裂/疲劳可靠性Key words
crack propagation rate/Q235 steel/statistic alanalysis/probability fracture mechanics/fatigue frac-ture/fatigue reliability分类
交通工程引用本文复制引用
王艺陶,冯国庆,李陈峰,任慧龙..船用Q235钢裂纹扩展速率试验[J].哈尔滨工程大学学报,2015,36(10):1302-1306,5.基金项目
国家自然科学基金资助项目(51279034) （51279034）
