Abstract:

In order to increase the mechaniacal strength of CCMPMP,mechanical properties of CCMPMP,such as tensile,compressive and bending properties,were investigated theoretically,and  the corresponding mechanical models were established.The stress of CCMPMP under the load of  tension,compression or bending was simulated respectively.Results show the largest stress of CCMPMP is larger than that of metal plate with the same dimension under the same load of tension, compression or bending, so the mechaniacal strength of CCMPMP is smaller than that of metal plate with the same dimension. And the mechaniacal strength of CCMPMP decreases with the increase of microchannel width and depth.No stress concentration occurs if CCMPMP sustains only forces,small stress concentration occurs if CCMPMP sustains only moments,and large stress concentration occurs if CCMPMP sustains forces and moments simultaneously.In addtion,stress concentration occurs easily when the microchannel width is small.

Key words: microchannel, porous material, tension, compression, bending

摘要：

为了增大交错互通微通道多孔网格板的机械强度，研究了网格板在拉伸、压缩以及弯曲情况下的力学性能，并建立了相应的理论模型，还对网格板在拉伸、压缩以及弯曲情况下的应力分布情况进行了仿真分析。结果表明，无论是拉伸、压缩还是弯曲，在同样受力F作用时网格板上的最大应力都比同等尺寸致密金属板的应力要大，网格板的机械强度相对致密金属板变小，并且网格板机械强度随着微通道宽度、深度的增大而减小;交错互通微通道多孔网格板在仅受力而未有力矩作用的情况下没有出现应力集中现象,在仅受力矩作用的情况下稍微出现应力集中现象,在同时受到力与力矩的双重作用时出现十分明显的应力集中现象;网格板在微通道宽度较小时更易产生应力集中。

关键词: 微通道, 多孔材料, 拉伸, 压缩, 弯曲