Hybrid Nanostructured Material Systems for Tailored Stress-Wave Mitigation of Impact and Blast Effects

提出了一种新的概念，即使用新材料以受控或定制的方式改变应力波的传输，以减轻爆炸和冲击对人和结构的影响。这个概念是通过控制纳米厚涂层的沉积，在微尺度上战略性地增强细胞固体（如泡沫）来开发新材料。采用逐层组装的方法沉积均匀和颗粒增强的纳米层，形成复杂的多尺度多层杂化增强材料，并在分子水平上控制其成分和微观结构。将进行材料和结构部件测试，以评估在伪静态和高速率载荷下的纳米尺度形貌和力学性能。将开发多尺度计算模型来研究应力波在复杂材料中的传播，并作为设计工具。该研究将为设计爆炸/冲击吸收材料带来突破性的知识，这些材料可以根据自身的变形和破坏来引导应力波的传播，从而控制和优化能量的消耗。它还将为复杂材料中的三维应力波传播问题提供新的见解。这一概念有可能彻底改变汽车、飞机、防弹衣和民用基础设施防护装置的设计。在多学科研究的基础上，将培养两名研究生攻读博士学位。该项目将与密歇根州立大学的一个新的本科工程学生住宿体验计划相结合，通过在？材料和安全？夏季研究机会将提供给传统上代表性不足的本科生。

A novel concept for the mitigation of blast and impact effects on people and structures with new materials that modify the transmission of stress waves in a controlled or tailored manner is proposed. The concept is to develop new materials by strategically reinforcing cellular solids (e.g., foams) at the micro-scale level by the controlled deposition of nanometer-thick coatings. Homogeneous and particulate-reinforced nano-layers will be deposited by the layer-by-layer assembly method to develop complex multiscale multilayer hybrid reinforcements with molecular-level control of its composition and microstructure. Material and structural component testing will be done to evaluate nano-scale morphology and mechanical properties under pseudo-static and high-rate loads. Multiscale computational models will be developed to study stress waves propagation through complex materials and to serve as design tools.The research will lead to breakthrough knowledge for designing blast/impact absorbing materials in which their deformation and failure is tailored to guide the propagation of stress waves and thus control and optimize energy dissipation. It will also provide new insight to the problem of three-dimensional stress-wave propagation in complex materials. The concept has the potential of revolutionizing the design of automobiles, aircraft, body armor and protective devices for civil infrastructure. Two graduate students will be trained towards a Ph.D. degree under the multidisciplinary basis of the research. The project will be integrated with a new Residential Experience Program for undergraduate engineering students at MSU by developing a Theme Community in ?materials and security.? Summer research opportunities will be offered to traditionally under-represented undergraduate students.