不同疲劳加载方法对金属悬臂梁性能影响的试验研究
Experimental study on the effect of different fatigue loading method on the performance of metal cantilever beam
Received:November 09, 2021  Revised:December 15, 2021
DOI:10.7520/1001-4888-21-265
中文关键词:  振动疲劳  常规疲劳  悬臂梁  疲劳性能
英文关键词:vibration fatigue  normal fatigue  cantilever beam  fatigue performance
基金项目:工信部民机预研课题资助(MJ-2017-F-21)
Author NameAffiliation
HE Dingni* China Helicopter Research and Development Institute, Jingdezhen 333001, Jiangxi, China 
LIAO Yunfei Shanghai Aeronautical Materials & Structures Testing Co., LTD, Shanghai 200120, China 
CUI Wei China Helicopter Research and Development Institute, Jingdezhen 333001, Jiangxi, China 
ZHANG Jianbo Shanghai Aeronautical Materials & Structures Testing Co., LTD, Shanghai 200120, China 
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中文摘要:
      为了探究不同疲劳加载方法对金属悬臂梁性能的影响,基于电磁振动台分别设计振动疲劳试验系统及相应常规疲劳试验系统,针对30CrNi4MoA合金钢悬臂梁进行弯曲疲劳试验研究。结果表明:30CrNi4MoA合金钢在循环次数为1×107cycle时的弯曲振动条件疲劳极限为514MPa,弯曲常规条件疲劳极限为516MPa;在循环次数小于1×106cycle时,30CrNi4MoA合金钢弯曲振动疲劳性能与常规疲劳性能差异较大,而当循环次数在1×106~1×107cycle时两者性能差异不大;两种疲劳加载方法下达到失效判据时试验件产生的损伤随应力水平的增加而增加;相同应力水平下,常规疲劳加载失效时试验件产生的损伤大于振动疲劳加载失效时的损伤。
英文摘要:
      In order to investigate the influence of different fatigue loading methods on the performance of metal cantilever, the vibration fatigue test system and the corresponding normal fatigue test system are designed based on the vibration table, and the bending fatigue test of 30CrNi4MoA alloy steel cantilever is studied. The results show that in 107 cycles, the vibration condition fatigue limit of 30CrNi4MoA alloy steel is 514MPa, while the normal condition fatigue limit is 516MPa. In fatigue cycle below 1×106 cycles, the bending vibration fatigue properties of 30CrNi4MoA alloy steel are different from those of normal ones; while fatigue cycle between 1×106 cycles and 1×107 cycles, the performance of the two groups almost equivalent. When the failure criterion is reached, the damage increases with the increase of stress level; under the same stress level, the damage caused by normal fatigue loading is greater than that caused by vibration fatigue loading.
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