【摘要】：針對機械工業(yè)中廣泛存在的微動疲勞失效問題,自主設(shè)計開發(fā)了一套接觸載荷實時可控的微動疲勞試驗系統(tǒng),研究了恒定接觸載荷和交變接觸載荷對6061-T651鋁合金微動疲勞壽命的影響.結(jié)果表明:在交變接觸載荷條件下,存在一個臨界接觸載荷使得微動疲勞壽命最低,且微動疲勞壽命隨著平均接觸載荷的增加呈現(xiàn)先減小后增加的變化行為;在低接觸載荷作用下,交變接觸載荷條件下的微動疲勞壽命明顯低于恒定接觸載荷條件下的微動疲勞壽命;在高接觸載荷作用下,交變接觸載荷與恒定接觸載荷對微動疲勞壽命的影響相近.
[Abstract]:Aiming at the problem of fretting fatigue failure in mechanical industry, a real-time and controllable fretting fatigue test system with contact load is designed and developed. The effect of constant contact load and alternating contact load on fretting fatigue life of 6061-T651 aluminum alloy was studied. The results show that under the condition of alternating contact load, the fretting fatigue life is the lowest due to a critical contact load, and the fretting fatigue life decreases first and then increases with the increase of the average contact load. Under low contact load, the fretting fatigue life under alternating contact load is obviously lower than that under constant contact load, and under high contact load, the fretting fatigue life is obviously lower than that under constant contact load. The influence of alternating contact load and constant contact load on fretting fatigue life is similar.
【作者單位】： 天津大學(xué)化工學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51435012)~~
【分類號】：TG115.58;TG146.21

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