摘要
A new kind of bio-inspired, lightweight structure was designed and built from carbon fibre prepreg based on the cross-sectional microstructure of a beetle's elytra. The compression strength and failure process of the resulting structure was analysed using the finite element method; while at the same time, a quasi-static compression experiment was performed using an electronic universal testing machine to verify the effectiveness and accuracy of this finite element method. This bio-inspired structure was compared against a conventional honeycomb structure using FEM, revealing that for a given porosity and load parallel to the axis of the core tubes the respective compressive and specific compressive strengths of the bioinspired structure are much higher at 84.3 MPa and194.7 MPa/(g cm-3); thus demonstrating that this bioinspired structure has superior compressive capability.
A new kind of bio-inspired, lightweight struc- ture was designed and built from carbon fibre prepreg based on the cross-sectional microstructure of a beetle＇s elytra. The compression strength and failure process of the resulting structure was analysed using the finite element method; while at the same time, a quasi-static compression experiment was performed using an electronic universal testing machine to verify the effectiveness and accuracy of this finite element method. This bioinspired structure was compared against a conventional honeycomb structure using FEM, revealing that for a given porosity and load parallel to the axis of the core tubes the respective compressive and specific compressive strengths of the bio- inspired structure are much higher at 84.3 MPa and 194.7 MPa/（g cm^-3）; thus demonstrating that this bioinspired structure has superior compressive capability.
基金
supported by the National Basic Research Program of China (2011CB302106)
the National Natural Science Foundation of China (51175249, 51105201)
the Aero-Science Foundation of China (2013ZF52072)
the Specialized Research Fund for the Doctoral Program of Higher Education (20123218110010)
