Experimental and Analytical Evaluation of Dynamic Fracture in Graded Multifunctional Materials

摘要针对分级多功能材料在不同加载条件下的动态力学响应与破坏进行了综合研究。将建立制备各种透明和不透明分级材料的程序。使用光学技术和高速摄影技术实时测量动态加载的固定和扩展裂纹尖端附近的应力场和变形场。建立适合实验数据分析的应力场，建立统一的材料动态裂纹萌生和扩展破坏准则。该研究将显著推进对分级多功能材料动态响应和失效特性的认识，并将对工业和国防机构具有巨大的价值。这项研究将涉及研究生和本科生，导致高级项目，论文和学位论文。学生将有机会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.