The Mechanics of Powder Consolidation for Composite Materials

这项研究是对粉末固结力学的一项非常广泛的调查，包括大量与金属，陶瓷和复合粉末通过增加热，压力和剪切应力固结有关的材料问题。该研究包括使用3-D有限元建模的应力，和各种模型，从广泛的来源，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的问题，即，在固结的后期阶段中的粗化问题，以及与复合材料的生产相关的各种复杂性，所述复合材料由在固结期间具有显著不同行为的几个离散相组成。该研究还将通过在固结过程中对材料进行实验测量，并通过在固结过程的各个阶段表征微观结构，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.