HB7705-2001金属材料疲劳小裂纹扩展速率试验方法.pdf

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1、中华人民共和国航空行业标准BB7705一2001金属材料疲劳小裂纹扩展速率试验方法2001一11一15发布2002一02一O1实施国防科学技术工业委员会发布HB7705一2001目次前言‘······················，·········，···········，，······················-··················，·，·········⋯⋯I1范围···························，···········，···········，·································

2、······⋯⋯12引用标准····················，·····························································一“·13符号、术语及定义························································，··················⋯⋯‘··⋯14试样···········‘················，·，··········，···············································，

3、⋯35试验设备·································，··········，，······················，····，，··············⋯⋯46小裂纹长度监测方法···························，·，···，·，，·····，·············-····················⋯⋯57试验程序········，，，·····，，，，·····，，，，，···，·，，·，·········，·······二··‘·，····，，，二58物理小裂纹疲劳门槛值试验程序····

4、·······，··············，··························⋯⋯79试验结果处理·················，··········，··········································，·········⋯⋯810试验报告-················，···············，·····，····，·········，··，········，········，·········，··⋯9附录A(标准的附录)复型方法·······························

5、···························⋯⋯11附录B(提示的附录)推荐的试样抛光方法··，·，···········································，，二12附录c(提示的附录)试验机和夹具的同心度检查方法····，···，·······，···················一14附录n(提示的附录)疲劳小裂纹原始数据记录表··········，·····，·······················一16附录E(提示的附录)检测疲劳裂纹长度的柔度方法·······，······，，··········，，··

6、····，，，一价附录F(提示的附录)半圆形缺口表面裂纹和角裂纹的应力强度因子计算············⋯⋯20附录G(提示的附录)推荐的疲劳小裂纹数据处理程序···············，·········，··。····⋯⋯22HB7705一2001oli舀本标准是航空界近十五年来在疲劳小裂纹方面所做大量理论和实验研究的基础上，并参考了ASTMSTP1149"Small一(;rackTestMethods"和ASTME647一95a的附录X3“测量疲劳小裂纹扩展速率指南”制定的。本标准的附录A是标准的附录。本标准的附录B、附录C、附录D、附录E、附录F和

7、附录c都是提示的附录。本标准由中国航空工业第一集团公司提出。本标准由航空工业航空材料热工艺标准化技术归口单位归口。本标准由北京航空材料研究院负责起草，沈阳飞机工业公司参加起草。本标准主要起草人:丁传富、刘建中、胡本润、吴学仁、李树柏。中华人民共和国航空行业标准金属材料疲劳小裂纹扩展速率试验方法HB7705-2001范围本标准规定了测定金属材料疲劳小裂纹扩展速率的试样、试验设备、裂纹监测方法、试验程序和试验结果处理等。本标准适用于在实验室空气环境条件下，用单边缺口拉伸试样(SENT)测定金属材料在轴向恒幅载荷、变幅载荷条件下从缺口处自然萌生的疲劳小裂纹的扩展速率。

8、2引用标准下列标准所包含