航空学报 > 1996, Vol. 17 Issue (6): 3-10

疲劳小裂纹的断裂力学参数及试验方法的研究进展

丁传富, 吴学仁   

  1. 北京航空材料研究所, 北京, 100095
  • 收稿日期:1995-07-07 修回日期:1996-01-10 出版日期:1996-12-25 发布日期:1996-12-25

INVESTIGATION AND DEVELOPMENT OF FRACTURE MECHANICS PARAMETERS AND TEST METHOD FOR SMALL FATIGUE CRACKS

Ding Chuanfu, Wu Xueren   

  1. Beijing Institute of Aeronautical Materials,Beijing,100095
  • Received:1995-07-07 Revised:1996-01-10 Online:1996-12-25 Published:1996-12-25

摘要: 介绍了小裂纹试验的通用试样和表征小裂纹特性的断裂力学参数。评述了最新发展的SENT试样的表面裂纹和角裂纹的应力强度因子方程。描述了小裂纹数据的表达准则和实验技术

关键词: 疲劳(材料), 小裂纹, 应力强度因子, 裂纹扩展速率, 塑料复型法

Abstract: Some common small crack test specimens are presented as well as the fracture mechanics parameters that have been used to characterize their behavior. A review of the most newly developed stress intensity factor equations for a semicircular surface crack located at the center of the notch root and a quarter circular corner crack in the SENT specimen is given. The expression rules for the small crack data and the experimental techniques are described in detail.

Key words: fatigue(material), small-crack, stress-intensity factor, crack growth plasticreplica method

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