试验对象对低载强化特性影响的研究

摘要

Using auto parts and standard material specimens, the strengthening characteristics of low amplitude loading was investigated. The results showed that the strengthening characteristics of low amplitude loading were greatly affected by the test specimens. For auto parts, there were obvious regions of strengthening cycles and strengthening loads, their strengthening conditions were easy to satisfy. Whereas the strengthening conditions of standard material specimens were strict, the strengthening loading should be matched with strengthening cycle which was higher than that of standard material specimen. The reasons of different strengthening conditions for these two types of specimens were primarily analyzed.%以标准材料试样和实际汽车零件为例,研究了不同试验对象对低载强化特性的影响。研究结果表明,试验对象对低载强化特性有很大的影响。汽车零件具有明显的低载强化特性,强化次数比低标准材料试样低,并且可以确定强化载荷区域。而标准材料试样的强化条件比较苛刻,强化次数高,强化载荷需要与强化次数合理搭配才能发现强化效果。初步分析了两类试验对象具有不同低载强化特性的原因。