本文主要針對管路結構, 考慮存在龜裂的情形, 建立一力學模型。以極限解析手法及彈塑性破壞力學的綜合解析手法, 利用簡易的柔度及J積分的評價方法, 對於龜裂夾角, 材料的破壞韌性值J/sub IC/與龜裂傳播抵抗dJ/da等影響管路結構因子, 進行探討。以了解其塑性鉸形成狀況、龜裂進展分布情形、變位與龜裂夾角的對應關係、以及其塑性崩壞行為。 This paper proposes an analytical model for a structural pipe system with crack. We combine the limit analysis, elastic-plastic fracture mechanics and utilize simple compliance and J-integral. Then we study those factors of crack-angle, J/sub IC/ and dJ/da that influencing pipe structure. At the end, we can conclude how the plastic hinge happen, the crack progress and the relation between the displacement and crack-angle at the crack.
關聯:
中華民國力學學會第廿二屆全國力學會議論文集(二)=Proceedings of the 22nd National Conference on Theoretical and Applied Mechanics (II),頁173-180