查詢結果分析
來源資料
頁籤選單縮合
題 名 | Fatigue Crack Propagation in the Eleastic-Plastic Regime in a Low Alloy Structural Steel=低合金結構用鋼在彈塑性範圍下之疲勞裂縫延伸 |
---|---|
作 者 | 單秋成; 李仁志; | 書刊名 | 中國工程學刊 |
卷 期 | 22:3 1999.05[民88.05] |
頁 次 | 頁275-284 |
分類號 | 440.221 |
關鍵詞 | 彈塑性範圍; 疲勞裂縫延伸; 循環J積分; 裂縫封閉; Elastic-plastic regime; Fatigue crack propagation; Cyclic J integral; Crack closure; |
語 文 | 英文(English) |
中文摘要 | 本研究探討BS 4360 Grade 50B低合金結構用鋼在高應力強度因子幅下的疲勞裂 縫延伸。涵蓋的裂縫延伸速率自10□mm/cycle至超過0.1mm/cycle。疲勞測試採用了三種 不同的控制方式,以獲致截然不同的負載歷史。此外,試片亦採用兩種有著顯著不同的降伏 牽制及滑移線場者,藉以驗證不同破壞力學參數統一地描述自以彈性為主至彈塑性範圍下疲 勞裂縫延伸速率的能力,結果證明祇有考慮了裂縫封閉後之循環J積分,始可以有效地做到 這一點。 |
英文摘要 | Fatigue crack propagation tests under a high Stress intensity range have been carried out on a low alloy structural steel BS 4360 Grade 50B. Crack growth rates ranging from about 10□ mm/cycle to over 0.1 mm/cycle have been recorded. Fatigue tests took on three kinds of control modes to achieve vastly different loading histories. Two specimen geometries which have markedly different yielding constraints and slip line field patterns have been employed. These tests aim at examining the ability of various fracture mechanics parameters to give a unifying quantitative correlation of fatigue crack growth rate from predominantly elastic to elastic-plastic regimes. An effective cyclic-J integral with crack closure being taken into account has been shown to be able to rationalize quantitatively the growth data under the different conditions investigated. |
本系統中英文摘要資訊取自各篇刊載內容。