Steady-state creep rate of a composite: Two-dimensional analysis
Steady-state creep rate of a composite: Two-dimensional analysis
复制标题
复合材料的稳态蠕变速率：二维分析
DOI：
10.1080/095008397179426
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发表时间：
1997
影响因子：
1.2
通讯作者：
K. Wakashima
中科院分区：
文献类型：
--
作者：
T. Mori;Y. Nakasone;M. Taya;K. Wakashima
本文提出了一种计算复合材料稳态蠕变速率的新方法，即在已知夹杂几何形状和基体蠕变规律的情况下。该方法是在一个简单的二维问题。在稳态蠕变过程中，基体中塑性应变的增加导致基体与单个弹性夹杂物之间的界面上位移的跳跃。这种跳跃被界面上的扩散和滑动所抵消。扩散速率由分布在界面上的法向力决定，滑动速率由切向力决定。根据这些力，计算夹杂物中的平均应力;它与稳态蠕变速率成比例。根据外应力为夹杂应力和基体应力的体积平均值的条件，建立了复合材料稳态蠕变的本构方程。
A new method is proposed for calculating the steady-state creep rate of a composite, when the inclusion geometry and the matrix creep law are known. The method is demonstrated in a simple two-dimensional problem. During steady-state creep, an increment in plastic strain in the matrix causes a jump in displacement on the interface between the matrix and an individual elastic inclusion. The jump is counterbalanced by that due to diffusion and sliding on the interface. The rate of diffusion is determined by a normal force distributed on the interface and that of sliding by a tangential force. From these forces, the average stress in the inclusions is calculated; it is proportional to the steadystate creep rate. From the condition that an external stress is a volumetric average of the stress in the inclusions and that in the matrix, the constitutive equation of stationary creep of the composite is formulated.