查詢結果分析
來源資料
相關文獻
- Relationship Between Propagation of Fatigue Cracks and Behaviour of Pla stic Folw Under Rolling/ Sliding Contacts-Effect of Load
- Fatigue Crack Propagation in the Eleastic-Plastic Regime in a Low Alloy Structural Steel
- EH32鋼疲勞裂縫延伸之研究
- HT50高張力鋼板疲勞裂縫延伸特性之研究
- 非均勻應力分佈板材中貫穿型疲勞裂縫之進展行為
- 以旋轉法塗佈非牛頓擬塑性流體之理論模型研究
- Tracking of the Yield Surfaces of Laminar Viscoplastic Flows in Noncircular Ducts Using an Adaptive Scheme
- SHRP瀝青膠泥成效規範值之探討及在臺灣地區舖面的應用
- Experimental and Analytical Fatigue Analysis on AISI 1050 Steel
- 軟弱夾層於連續壁槽溝開挖之穩定性
頁籤選單縮合
題名 | Relationship Between Propagation of Fatigue Cracks and Behaviour of Pla stic Folw Under Rolling/ Sliding Contacts-Effect of Load=滾滑動接觸 面之疲勞龜裂延伸與塑性流動行為的關係負荷之影響 |
---|---|
作者 | 邱源成; 李榮宗; 張政煇; | 書刊名 | 力學 |
卷期 | 9:1 1993.03[民82.03] |
頁次 | 頁17-25 |
分類號 | 446.12 |
關鍵詞 | 延伸; 流動行為; 疲勞; 接觸面; 塑性; 滾滑動; 龜裂; 疲勞裂縫; 塑性流; 滾動/滑動接觸; 中碳鋼; Fatigue cracks; Plastic flow; Rolling/Sliding contacts; Load; Medium carbon steel; |
語文 | 英文(English) |
中文摘要 | 本研究使用滾動試驗機,藉由觀察接觸表面層塑性流動的位移及疲勞裂縫的伸張 ,探討負荷對中碳鋼接觸表面之疲勞裂縫的伸張機構及疲勞壽命之影響。從接觸表面層的塑 性流動外形之變化及疲勞裂縫之伸張角度, 可發現當負荷大於 980N 或 P0>3.3K ( P0 為 最大赫茲接觸應力,k 為試片之降伏剪應力)時,疲勞裂縫伸張角度,θp,與塑性流動角 度,θ f,很一致。 但是當負荷小於 980N (或 P0 < 3.3K )時,由於沒有足夠的塑性流 動去促進疲勞裂縫的伸張,所以θ p 和θ f 有些差別。這種在低負荷下,θ p 與θ f 差 異之原因,可考慮為疲勞裂縫的伸張主要受到接觸峰端的影響。當疲勞破裂發生之前,塑性 流動的位移和滾動總回轉數的經驗式已在本文求得。同時由於加工硬化使表面層的硬度因而 增加,其對破壞之影響也在本文探討。 |
英文摘要 | An experimental study on the propagating mechanism of fatigue cracks during rolling/sliding contact is investigated for a wide range of loads by observing the displacement of plastic flow and the propagation of fatigue cracks on the contact surface layer of medium carbon steel speciments. According to the change of the profile of plastic flow and the propagating angle of fatigue cracks on the contact surface, it is interesting to note that the propagating angle, θ p, of the fatigue crack is almost the same as the angle, θ f, of plastic flow when the load exceeds 980N (or Po>3.3k). When the load lies within 980N (or Po<3.3k), there is insufficient plastic flow to promote the propagation of crack, and θ p is different from θ f. Under this low loading condition, the fatigue cracks are mainly influenced by the asperity contact, where the position of cracks is random and is hard to see the cracks at the same place on the contact surface. Before the fatigue cracks occurred, a compact form between the displacement of plastic flow and the total number of revolutions for a wide range of loads is derived. The effect of the hardness in the surface layer owing to work hardening on the cracks is also investigated. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。