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THE TRACTION PROBLEM IN ELASTODYNAMICS
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作者 谷安海 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1992年第11期1067-1076,共10页
In continuum mechanics. Cauchy's six equationsare incomplete[1] and the famous Cauchy's laws of motionand TT =Twhere ρx, ρb , T and divT are continuous are also incomplete[2]. The first six equations are inc... In continuum mechanics. Cauchy's six equationsare incomplete[1] and the famous Cauchy's laws of motionand TT =Twhere ρx, ρb , T and divT are continuous are also incomplete[2]. The first six equations are incomplete because the geometrical representation of deformation at a given point is as yet incomplete[3], and the last two laws are incomplete because b,T and divT are frame-indifferent, but ρx is not, and T is a symmetric, as Cauchy interpreted himself. Therefore, we say, the last two laws can't accommodate to the asymmetric tensor.The purpose of this paper is to complete Cauchy 's laws of motion by postulating an asymmetric tensor for the underlying traction field of 3-dimensional space on a general framing. 展开更多
关键词 TRACTION WEIGHTLESSNESS ASYMMETRIC TENSOR
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弹性动力学中的牵引力问题
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作者 谷安海 《应用数学和力学》 CSCD 北大核心 1992年第11期1021-1029,共9页
在连续介质力学中不仅Cauchy六方程e_(ji)=(?)u_i/(?)x^i及e_(jk)=(?)u_j/(?)x^k+(?)u_k/(?)x^j(1≤i,j,k≤3,i≠j≠k)是不完善的,而且著名的Cauchy运动定律ρ(?)=divT+ρb及T^T=T(式中,ρ(?),ρb,T及divT是连续的)也是不完善的.前六个... 在连续介质力学中不仅Cauchy六方程e_(ji)=(?)u_i/(?)x^i及e_(jk)=(?)u_j/(?)x^k+(?)u_k/(?)x^j(1≤i,j,k≤3,i≠j≠k)是不完善的,而且著名的Cauchy运动定律ρ(?)=divT+ρb及T^T=T(式中,ρ(?),ρb,T及divT是连续的)也是不完善的.前六个方程的不完善是由于在空间给定点上变形的几何表示方法至今尚非完全,而后两个定律的不完善则Cauchy自己解释说ρb,T及divT是标架无关的,但ρ(?)则不是,且T是对称的.因此我们说后两个定律不可能满足广义标架上的非对称张量.本文的目的是在三维牵引力域的影响下用广义标架上的非对称张量来完善Cauchy运动定律. 展开更多
关键词 牵引力 弹性动力学
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