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THE GENERAL SOLUTION OF SECOND ORDER EFFECTS IN ELASTIC HALF-SPACE ACTED UPON BY A NON-UNIFORM SHEAR LOAD
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作者 刘又文 郭建林 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1997年第4期365-380,共16页
This paper is a continuation of [1]. A closed form solution to the second order elasticity problem, when an isotropic compressible elastic half-space undergoes a deformation owing to a non-uniformly distributed shear ... This paper is a continuation of [1]. A closed form solution to the second order elasticity problem, when an isotropic compressible elastic half-space undergoes a deformation owing to a non-uniformly distributed shear load, is presented. The method of integral transform is employed to determine the solutions. 展开更多
关键词 elastic half-space shear load second order elasticity effects integral transform
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THE ILLUSTRATION CALCULATIONS OF SECOND ORDER EFFECTS IN ELASTIC HALF-SPACE ACTED UPON BY A NON-UNIFORM SHEAR LOAD
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作者 刘又文 郭建林 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1997年第6期563-570,共8页
This paper is a continuation of [1]. An example is discussed in derail to illustrate the second order effects. Numerical calculations for the second order elastic material for the z-direction displacement and the stre... This paper is a continuation of [1]. An example is discussed in derail to illustrate the second order effects. Numerical calculations for the second order elastic material for the z-direction displacement and the stress t(rz) are carried out. It is found that the second order effect is to reduce z-direction displacement and to decrease t(rz)inside the circle but to increase its value outside the circle. 展开更多
关键词 elastic half-space shear load second order elasticity effects integral transform
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SECOND ORDER EFFECTS IN AN ELASTIC HALF-SPACE ACTED UPON BY A NON-UNIFORM NORMAL LOAD
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作者 刘又文 郭建林 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1994年第12期1149-1168,共16页
A closed form solution to the second order elasticity problem ,when an isotropiccompressible elastic half-space undergoes a deformation owing to a non-uniformlydistributed normal load,is presented,The method of integr... A closed form solution to the second order elasticity problem ,when an isotropiccompressible elastic half-space undergoes a deformation owing to a non-uniformlydistributed normal load,is presented,The method of integral transform is employedand the case when loading is distributed,in accordance with Hertz'x law ,is discussed.The limiting solution for incompressible isotropic elastic material is also derived.Numerical calculations for the second order elastic material for the displacement and the normal stress in the z-direction are carried out .It is found that,in comparison to the linear elastic case,the displacement increases and the normal stress decreases in the second order elastic material. 展开更多
关键词 elastic half-space. second order elasticity problem. integraltransform
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三维边界元法中高阶单元上的几乎奇异积分 被引量:4
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作者 张耀明 李小超 +1 位作者 Vladimir Sladek Jan Sladek 《力学学报》 EI CSCD 北大核心 2013年第6期908-918,共11页
三维边界元分析中,高阶几何单元上的几乎奇异积分计算是一个重要而且困难的问题,该文对此进行了研究.使用8节点四边形和6节点三角形曲面单元来描述几何边界;构造了新的距离函数;拓展原有的指数函数非线性变换到三维边界元法中,利用拓展... 三维边界元分析中,高阶几何单元上的几乎奇异积分计算是一个重要而且困难的问题,该文对此进行了研究.使用8节点四边形和6节点三角形曲面单元来描述几何边界;构造了新的距离函数;拓展原有的指数函数非线性变换到三维边界元法中,利用拓展的变换来消除被积函数的几乎奇异性.数值算例表明,该算法稳定,效率高,即使计算点到实际边界的距离很小,依然可获得令人满意的数值解. 展开更多
关键词 三维弹性问题 边界元法 几乎奇异积分 高阶几何单元 变换法
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非均匀法向荷载下半空间的二阶弹性效应问题 被引量:1
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作者 刘又文 郭建林 《应用数学和力学》 CSCD 北大核心 1994年第12期1091-1110,共20页
本文提供各向同性弹性半空间,在非均匀分布法向荷载下,二阶弹性效应的一个封闭形式解,运用积分变换方法,讨论了按Hertz规律分布的荷载情形;导出了不可压缩各向同性弹性材料的极限解;算出了上述二阶弹性材料问题在z方向的位... 本文提供各向同性弹性半空间,在非均匀分布法向荷载下,二阶弹性效应的一个封闭形式解,运用积分变换方法,讨论了按Hertz规律分布的荷载情形;导出了不可压缩各向同性弹性材料的极限解;算出了上述二阶弹性材料问题在z方向的位移和法向应力数值。我们发现,与线弹性情形相比较,在二阶弹性材料中相应位移增大而法向应力减小。 展开更多
关键词 弹性半空间 弹性效应 非均匀法 载荷
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