Abstract
To investigate the characteristics of compression, buffering and energy dissipation in beetle elytron plates (BEPs), compression experiments were performed on BEPs and honeycomb plates (HPs) with the same wall thickness in different core structures and using different molding methods. The results are as follows: 1) The compressive strength and energy dissipation capacity in the BEP are 2.44 and 5.0 times those in the HP, respectively, when the plates are prepared using the full integrated method (FIM). 2) The buckling stress is directly proportional to the square of the wall thickness (t). Thus, for core structures with equal wall thicknesses, although the core volume of the BEP is 42 percent greater than that of the HP, the mechanical properties of the BEP are several times higher than those of the HP. 3) It is also proven that even when the single integrated method (SIM) is used to prepare BEPs, the properties discussed above remain superior to those of HPs by a factor of several; this finding lays the foundation for accelerating the commercialization of BEPs based on modern manufacturing processes.
Highlights
The collisions and impacts that occur in various disasters pose a tremendous threat to the safety of human lives and property
To investigate the characteristics of compression, buffering and energy dissipation in the beetle elytron plates (BEPs), compression experiments were conducted in this study to compare the BEP with the honeycomb plate (HP), for plates constructed with the same wall thickness of the core structure and using different molding methods
The results are as follows: (1) Regardless of which molding method is used and whether the core structures of the BEP and HP are of equal volume (EV) or equal thickness (ET), the stage III stress-strain curve of the BEP shows a good plastic deformation capacity, in the ET case
Summary
Compressive properties of BEPs produced using the full integrated method. Figure 5(a,b) shows the results for the two types of fully integrated sandwich plate of equal thickness (ET). It can be seen that a BEP is an excellent example of a functional-structural material, and even when the SIM is used, the compressive strength of a BEP is still 3.1 times that of a HP with the same wall thickness, and the energy dissipation capacity is 6.3 times higher, because of the structural superiority of beetle elytra compared with honeycomb. From the perspective of engineering applications, the SIM could be adopted to prepare BEPs before FIMBEPs are developed
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