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1INTRODUCTIONTheresearchonorganicpolyaminesiscur-rentlyofgreatinterestbecauseoftheirpotentialapplicationsasusefulorganicligands,inwhichtheaminenitrogenatomshavestrongcoordinationabilitytothetransitionmetalions.Theirtransitionmetalcomplexesplayanexcellentr… 相似文献
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实验观察到塑性变形中的旋转现象。这种塑性旋转是由旋错,位错的特殊排列和微观结构上缺陷滑动所产生的非均匀性,本文基于塑性旋转的微观机制,建立了缺陷(位错和旋错)运动所满足的守恒方程。基于非对称连续介质力学理论,导出了缺陷运动所满足的扩散方程。利用塑性功的最大耗散过程和尺度不变性,推出了Cosserat塑性力学中的各种模型。 相似文献
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In this paper, a nonlinear theory of nonlocal asymmetric, elastic solids is developed on the basis of basic theories of nonlocal continuum fieM theory and nonlinear continuum mechanics. It perfects and expands the nonlocal elastic fiteld theory developed by Eringen and others. The linear theory of nonlocal asymmetric elasticity developed in [1] expands to the finite deformation, We show that there is the nonlocal body moment in the nonlocal elastic solids. The noniocal body moment causes the stress asymmetric and itself is caused by the covalent bond formed by the reaction between atoms. The theory developed in this paper is applied to explain reasonably that curves of dispersion relation of one-dimensional plane longitudinal waves are not similar with those of transverse waves. 相似文献