【摘 要】
：
应用ANSYS软件对硅藻土填充聚丙烯(PP)复合材料在弯曲载荷下的界面应力分布进行了有限元模拟.结果表明:PP与硅藻土粒子之间界面区各方向的正应力、等效应力、以及xy方向上的
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应用ANSYS软件对硅藻土填充聚丙烯(PP)复合材料在弯曲载荷下的界面应力分布进行了有限元模拟.结果表明:PP与硅藻土粒子之间界面区各方向的正应力、等效应力、以及xy方向上的剪切应力均于硅藻土粒子的极点处达到最大值,并沿界面朝赤道方向逐渐减小;而yz方向上的剪切应力在粒子的极点附近最小,然后逐渐增大,在距极点约30°处达到最大值;随后回落,距极点约40°后,变化趋于平缓.可见,聚丙烯/硅藻土复合体系在弯曲载荷作用下于粒子极点处产生应力集中,形成脱粘乃至裂纹,是材料失效的主要原因.
The ANSYS software was used to simulate the interface stress distribution of diatomite-filled polypropylene (PP) composite under flexural load. The results show that the normal stress in the interface zone between PP and diatomite particles, the equivalent effect The shear stress in the xy direction reaches the maximum at the pole of the diatomite particles and decreases toward the equator along the interface. The shear stress in the yz direction is the smallest near the pole of the particle and then gradually decreases Increases, reaches the maximum at about 30 ° from the pole, then falls backwards, and the change tends to be gentle after about 40 ° from the pole. It can be seen that the polypropylene / diatomite composite system exerts stress on the pole of the particle under the bending load Concentration, the formation of debonding and even cracks, is the main reason for material failure.
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