Research On Bio-inspired Design And The Mechanical Properties Of Epoxy/CERP Lightweight Structure

After millions years of beetle’s evolving, beetle’s elytra had developed a special structure andfunction that can adapt to the surroundings. The studies have shown that beetle’s elytra is a kind ofbiological materials that in possess of lightweight, high strength and resistant to damage. Recently,this material is one of the bionic objects to research the new kind of light weight, high strength andmulti-functional structural material.According to the character of beetle’s elytra that has the structure of cavity-small hollow column,a kind of bio-inspired lightweight structure based on epoxy-based carbon fiber was designed;Considering the preparation of composites and the character of bio-inspired structure, the molds weredesigned and processed and the preparation was confirmed; At last, the bio-inspired structure samplewere prepared with the method of molding and co-curing molding.Carrying out the quasi-static compression experiments of the bionic lightweight structures, thenthe compressive force-displacement curves were obtained. At the same time, the compressivemechanical property of the structure was analyzed with FEM. Comparing the experimental resultswith the FEM analysis, the results proved both the accuracy and reliability of FEM. The plane shearmechanical property of the structure was analyzed with FEM further and the result shows that themaximum shear force plane of the bionic lightweight structure is6079.39N.The parameter optimizing designation of the bio-inspired structure was conducted with themethod of response surface methodology. Firstly, after confirming the design variables, the samplepoint set were obtained by using the Latin Hypercube experimental design method; Then, theresponse value of each sample point were gained by using ANSYS, which was established theapproximate agent model with the response value; At last, by using the method of linear searching tooptimize the structure, the optimal structural parameter was obtained.The bio-inspired structure was conducted with the structural stable buckling analysis, which wascompared with the yield property of honeycomb structure in the case of the same porosity.