The Mechanics of Powder Consolidation for Composite Materials

这项研究是在压力下将粉末固结成先进的陶瓷、金属和金属间复合材料。这项研究的目标是开发一种预测致密化的能力，从而能够选择加工这些先进材料的最佳温度和压力。将对均质材料和复合材料进行分析和数值模拟。相关实验将进行，以提供洞察重要的物理过程的巩固。重点将放在增强纤维周围粉末的致密化。因此，将进行试验研究纤维在固结过程中的破坏发生率。还将开发纤维破坏的模型以及这种破坏对固结复合材料的最终机械性能的影响。该项目开发的科学技术将使加工具有所需致密净形状和机械性能的高级复合材料成为可能。

This research is on pressure consolidation of powders into advanced ceramic, metallic, and intermetallic composites. The goal of the research is to develop an ability to predict densification that will enable the selection of optimal temperatures and pressures for processing these advanced materials. Analytical and numerical modeling will be carried out for both homogeneous and composite materials. Related experiments will be conducted to provide insight into the important physical processes of consolidation. Emphasis will be placed on densification of powder around reinforcing fibers. Accordingly, experiments will be done to investigate the incidence of fiber failure during consolidation. Models will also be developed for fiber failure and for the effect of such failure on the final mechanical properties of the consolidated composite material. The science and technology developed in this project will make it possible to process advanced composites with the desired densified net shape and mechanical properties.