任意의 Crack을 가진 正三角形棒의 K_Ⅲ/M_z에 關한 硏究 = A Study on K_Ⅲ/M_z of equlateral triangular bar with partial crack under pure torsional moment.

다국어 초록 (Multilingual Abstract)

Up to now, there is no analysis on the Kr/M: in the cas where equilateral triangular bar with partial crack is under pure torsional moment. In this paper, an arbitrary circular bar which is equal to the torsional rigidity factor of equilateral triangular bar has the similar external partial crack as the equilateral triangular bar on the boundary condition. And then, the theoretical equation of the circular bar with crack is nearly in accord with experimental analysis of equilateral triangular with crack under pure torsional moment. Therefore. Stress analysis of equilateral triangular with crack under pure torsional moment can analyzed as equivalent circular bar under pure torsional moment which has the saint; torsional rigidity factor as torsional rigidity factor of equilateral triangular bar. the equation of 9a resulted from using membrane analogy in this paper is shown by equation(21).

목차 (Table of Contents)

• Ⅰ. 緖論
• Ⅱ. 理論解析
• 1. 薄膜相似理論
• 2. 正三角形棒의 비틀림應力解析
• 3. 正三角形斷面棒J값과 相當하는 任意圓棒이 Crack을 갖는 경우의 <원문참조>의 解析
• 4. Crack에 對한 相似理論
• Ⅲ. 實驗
• 1. 試片 및 變位束結法
• 2. 體積測定과 기울기測定
• Ⅳ. 實驗結果 및 考察
• Ⅴ. 結論