[SY-J2] Role of geometrical features on mechanical properties in bio-inspired staggered composites
Nacre (mother of pearl), bone, and teeth boast a prominent amalgamation of mechanical facets such as strength, toughness and stiffness. Merger of these properties in engineering materials is still a challenge. Nacre, which is an inner shell layer of many sea-shells, primarily made of 95% of brittle mineral (calcium carbonate), however; it exhibits superior mechanical properties as compared to their major constituents. Micro-structure of nacreous layer reveals the staggered 'brick-bridge-mortar' architecture in which polygonal shaped mineral tablets are stacked and organic layer and mineral bridges act as a glue and interconnection between platelets, respectively. Mimicking of the architecture of these biological materials has captured the attention of research community for development of high performance composites. However, an in-depth knowledge of structure-properties-function relationship is still lacking. Therefore, the goal of the present study is to provide a detailed understanding on the role of geometric parameters towards the origin of extraordinary mechanical properties.
In the present study, we will develop a predictive modeling framework to understand the influence of staggered architectured composite on emergent mechanical behaviors under quasi-static loading condition. Therefore, a finite element framework will be adopted and implemented in parallel computing enviroment. The state-of-art cohesive zone models will be incorporated to account the failure of inter-layers and mineral bridges, separately. Using the model, we will provide systematic parametric study of geometrical features such as overlap ratio, aspect ratio, bridge density and bridge distribution on emergent strength, stiffness and toughness. Finally, detail design map will be constructed that can assist to develop novel architectured composites with tailored mechanical properties.
In the present study, we will develop a predictive modeling framework to understand the influence of staggered architectured composite on emergent mechanical behaviors under quasi-static loading condition. Therefore, a finite element framework will be adopted and implemented in parallel computing enviroment. The state-of-art cohesive zone models will be incorporated to account the failure of inter-layers and mineral bridges, separately. Using the model, we will provide systematic parametric study of geometrical features such as overlap ratio, aspect ratio, bridge density and bridge distribution on emergent strength, stiffness and toughness. Finally, detail design map will be constructed that can assist to develop novel architectured composites with tailored mechanical properties.