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首页> 外文期刊>Aerospace science and technology >Determination of fracture toughness and fatigue crack growth rate using circumferentially cracked round bar specimens of Al2014T651
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Determination of fracture toughness and fatigue crack growth rate using circumferentially cracked round bar specimens of Al2014T651

机译：使用Al2014T651圆周裂纹圆棒试样确定断裂韧性和疲劳裂纹扩展率

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摘要

Fracture toughness (K-IC) and fatigue crack growth rate (FCGR) are the important material properties in fracture mechanics. ASTM-E399 and ASTM-E647 are the standards for determination of K-IC and FCGR of metallic materials. These standards recommend the use of compact tension (CT) or single edge notched bend (SENB) test specimens. Literature review indicates that CT or SENB specimens are complex in nature, difficult to manufacture, require typical fixtures for loading during experimentation and the test procedures using CT or SENB are time consuming and cumbersome. An alternate specimen geometry which can overcome the above said drawbacks is needed by the industry which can be used as standard test specimen geometry. This research work explains use of circumferentially cracked round bar (CCRB) specimens of high strength Al2014T651 alloy for determination of K-IC and FCGR
机译：断裂韧性（K-IC）和疲劳裂纹扩展速率（FCGR）是断裂力学中重要的材料性能。 ASTM-E399和ASTM-E647是测定金属材料的K-IC和FCGR的标准。这些标准建议使用紧凑张力（CT）或单边缺口弯曲（SENB）测试样本。文献综述表明，CT或SENB标本本质上是复杂的，难以制造，在实验过程中需要典型的夹具来加载，而使用CT或SENB的测试程序既费时又麻烦。工业上需要一种可以克服上述缺点的替代试样几何形状，其可以用作标准试样几何形状。这项研究工作解释了如何使用高强度Al2014T651合金的周向裂纹圆棒（CCRB）标本测定K-IC和FCGR

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