假如想来校核结构的安全性,必须在大于用无损探伤法探出的缺陷的结构件上或相似的应变集中的结构件上进行试验。如上所述,最适当的应变集中是裂纹,此裂纹可用锯口或机械加工细槽来代替,考虑到厚度和有裂纹的存在,必须要有一定的宽度,这就自然地想到具有中央裂纹的宽板试验。这种试验首先由英国焊接研究所提出,象用却贝试验评定材料一样,该所威尔斯教授获得的低应力脆性断裂的宽板试验结果正好起到了评定结构的相同作用。如果说却贝试验是法国的建议,则宽板试验是英国的。这两种评定方法之间有本质的区 If we want to check the safety of the structure, we must test the structure on the structural part or similar strain concentrated more than the defect detected by non-destructive testing method. As mentioned above, the most appropriate strain concentration is a crack, which can be replaced by a kerf or a machined slot, which, given the thickness and the presence of cracks, must have a certain width, which naturally assumes the presence of a central crack Wide board test. This test, first proposed by the British Institute of Welding, like the Zabel test for evaluating materials, produced the same wide-scale test results of the low-stress, brittle fracture obtained by the Wells professor. If the Charpy test is a French proposal, the wide board test is British. There is an essential area between these two methods of assessment