Abstract
The complex cellular structure of trabecular bone possesses lightweight and superior energy absorption capabilities. By mimicking this novel high-performance structure, engineered cellular structures can be advanced into a new generation of protective systems. The goal of this research is to develop an analytical framework for predicting the critical buckling load, Young’s modulus and energy absorption of a 3D printed bone-like cellular structure. This is achieved by conducting extensive analytical simulations of the bone-inspired unit cell in parallel to traverse every possible combination of its key design parameters. The analytical framework is validated using experimental data and used to evolve the most optimal cellular structure, with the maximum energy absorption as the key performance criterion. The design charts developed in this work can be used to guide the development of a futuristic engineered cellular structure with superior performance and protective capabilities against extreme loads.
Highlights
An analytical model is developed to predict the Young’s modulus, Euler buckling load and strain energy density of the 3D printed bone-like cellular structure
An analytical framework was developed to predict the critical buckling load, stiffness and energy absorption of a cellular structure based on trabecular bone
It was observed that all design parameters, namely the sub-cell angles and tie lengths of the unit cell played a significant role in obtaining the highest energy absorption
Summary
An analytical model is developed to predict the Young’s modulus, Euler buckling load and strain energy density of the 3D printed bone-like cellular structure. A computer algorithm was developed to execute many parallel simulations to obtain the design parameters ( α, β, γ , lut , llt ) that produce the biomimetic unit cell with the optimal energy absorption.
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