The Mechanics of Powder Consolidation for Composite Materials

该研究是对粉末固结力学的一项非常广泛的研究，结合了大量与金属、陶瓷和复合粉末通过加热、压力和剪切应力的固结有关的材料问题。研究包括使用应力的三维有限元模型，以及来自广泛来源的各种模型，用于压力和应力对致密化的影响。该计划还解决了微观结构控制问题，即固结后期的粗化问题，以及与复合材料生产相关的各种并发症，复合材料由几个离散相组成，在固结过程中具有显著不同的行为。该研究还将通过对材料在固结过程中的实验测量以及固结过程中各个阶段的微观结构表征来研究各种金属、陶瓷和复合材料的行为。

The research is a very broad investigation into the mechanics of powder consolidation, incorporating a large number of materials problems related to consolidation of metal, ceramic and composite powders through the addition of heat, pressure and shear stresses. The research includes the use of 3-D finite element modelling of the stresses, and various models, from a wide range of sources, for the effects of pressure and stresses on densification. The program also addresses the issue of microstructure control, i.e., the problem of coarsening in the latter stages of consolidation, and the various complications associated with the production of composite materials, consisting of several discrete phases with significantly different behavior during consolidation. The research will also investigate the behavior of a great variety of metal, ceramic and composite materials through experimental measurements on materials during the consolidation process, and through characterization of microstructures at various stages of the consolidation process.