| 混合边界多裂隙体在简谐变温场作用下的断裂问题（张开型） |
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| 引用本文： | 张国新,刘光廷.混合边界多裂隙体在简谐变温场作用下的断裂问题（张开型）[J].应用力学学报,1993,10(2):37-45. |
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| 作者姓名： | 张国新 刘光廷 |
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| 作者单位： | 清华大学水利系
(张国新)，清华大学水利系(刘光廷) |
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| 摘 要： | 给出了无限平面作用有简谐变化的点热源时的位移场、应力场基本解、用间接法构造出混合边值多裂隙体在简谐变温场作用下的热断裂问题的边界积分方程,并离散求解.数值结果表明,该方法求解多裂隙体的简谐热断裂问题精度好,计算工作量少.文中计算了含边界裂缝的平板、含三条平行裂缝的平板在简谐变温场作用下缝端应力强度因子的变化过程,并与实验结果进行了比较,两者吻合良好.
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| 关 键 词： | 多裂隙体 简谐变温场 混凝土坝？ |
The Thermal Fracture Problem of Mixed Boundary Body with Multiple Cracks under Harmonic Thermal Load |
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| Guoxin Zhang Guangting Liu.The Thermal Fracture Problem of Mixed Boundary Body with Multiple Cracks under Harmonic Thermal Load[J].Chinese Journal of Applied Mechanics,1993,10(2):37-45. |
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| Authors: | Guoxin Zhang Guangting Liu |
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| Institution: | Hydraulic Dept. Tsinghua University |
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| Abstract: | In present paper the fundamental solution of displacement and thermal stress field caused by a point harmonic thermal source in an infinite plane is introduced. The boundary integral equations, in which fictitious boundary forces are taken as the unknowns, for harmonic thermal fracture problems of the finite body with multiple cracks and mixed boundary conditions are proposed. BEM was used to solve the equations. Numerical solutions showed that the prescribed method gave results with high precision and took only little calculating work. The S1F at the tips of cracks versus time in a plate with edge-crack and a plate with three parallel cracks under harmonic thermal load were calculated. The numerical and experimental results are in good agreement. |
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| Keywords: | multiple cracks body harmonic temperature field thermal fracture fi(?)titious force |
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