Stress distribution around inclusions, interaction, and mechanical properties of particulate‐filled composites
Stress distribution around inclusions, interaction, and mechanical properties of particulate‐filled composites
复制标题
颗粒填充复合材料的夹杂物周围的应力分布、相互作用和机械性能
DOI：
10.1002/pc.10625
复制
发表时间：
1996
影响因子：
5.2
通讯作者：
G. Vörös
中科院分区：
文献类型：
--
作者：
B. Pukánszky;G. Vörös
通过应力分析确定了颗粒填充复合材料中颗粒周围的应力分布。还考虑了相互作用的应力场的影响。当填料含量较大时，相互作用的应力场补偿了应力集中的影响。将解引入到Von Mise屈服准则中。用不同的边界条件和平均技术确定了拉伸屈服应力与成分的关系。推导了预测颗粒尺寸和粘附性与屈服应力的关系的解析表达式。分析表明，大颗粒和弱相互作用导致脱粘。在粘结力较强的情况下，主要的微机械变形过程是基质的剪切屈服。在这种情况下，颗粒大小的依赖关系可以用界面相互作用的影响来解释，界面相互作用导致界面相的形成。主要的变形机制是由颗粒特性和组元的粘附性决定的。分析结果与实验结果吻合较好。
Stress analysis was carried out to determine the stress distribution around particles in particulate-filled composites. The effect of interacting stress fields was also taken into account. At large filler contents, interacting stress fields compensate for the effect of stress concentration. The solutions were introduced into the Von Mises criterion for yielding. The composition dependence of tensile yield stress was determined by using different boundary conditions and averaging techniques. An analytical expression was derived that predicts particle size and adhesion dependence of the yield stress. The analysis shows that large particles and weak interaction lead to debonding. In the case of strong adhesion, the dominating micromechanical deformation process is the shear yielding of the matrix. In such cases, particle size dependence can be explained with the effect of interfacial interactions, which lead to the formation of an interphase. The dominating deformation mechanism is determined by particle characteristics and adhesion of the components. The predictions of the analysis are in good agreement with experimental observations.