Experimental and Analytical Evaluation of Dynamic Fracture in Graded Multifunctional Materials

梯度多功能材料动态断裂的实验与分析评价本文对梯度多功能材料在不同加载条件下的动态力学响应和破坏进行了全面的研究。将建立各种透明和不透明分级材料的制备程序。动态加载的静止和扩展裂纹尖端附近的应力场和变形场将使用光学技术和高速摄影进行实时测量。建立合适的应力场来分析实验数据，并建立这些材料中动态裂纹萌生和扩展的统一失效准则。这项研究将极大地提高对梯度多功能材料动态响应和失效特征的认识，对工业和国防机构具有巨大的价值。这项研究将包括研究生和本科生，以产生高级项目、论文和学位论文。学生将有价值地接触到材料合成的挑战，以及用于新材料的机械和断裂表征的各种实验技术。

Experimental and Analytical Evaluation of Dynamic Fracture in Graded Multifunctional MaterialAbstractA comprehensive investigation of the dynamic mechanical response and failure of graded multifunctional materials under different loading conditions is proposed. Procedures for preparing a variety of both transparent and opaque graded materials will be established. Stress and deformation fields near dynamically loaded stationary and propagating cracks tips will be measured in real-time using optical techniques and high-speed photography. Appropriate stress fields for analyzing the experimental data will be developed, and a unified failure criterion for dynamic crack initiation and propagation in these materials will be established. This study will significantly advance knowledge on the dynamic response and failure characteristics of graded multifunctional materials, and will be of immense value to industries and defense agencies. This research will involve graduate and undergraduate students resulting in senior projects, theses and dissertations. The students will receive valuable exposure to the challenges of material synthesis and various experimental techniques used for mechanical and fracture characterization of novel materials.