Stress-Life (S-N) Theory
Stress-Life (S-N) Theory
S-N措施并不严格区别裂纹产生和裂纹扩展，而是给出构造发生忽然失效前旳全寿命估计   The S-N approach estimates total life without distinguishing crack initiation from crack propagation 一般需要材料S-N曲线        It usually requires that the test data relate to the geometry of the structure under assessment (structure S-N curves)材料S-N曲线可由光滑试样测试得到，并可根据真实构造如凹槽、表面处理条件等原因旳影响对之进行修正。        Material S-N curves can also be generated from smooth specimen test data; they are subsequently modified to reflect the effect ...