Development of numerical realistic model for predicting low-velocity impact response of aluminium honeycomb sandwich structures

Okabe

et al. 2017

For developing lightweight and high-strength biomimetic sandwich structures, this study investigates the influence of honeycomb dimensions and forming methods on the mechanical properties of beetle elytron plates relative to honeycomb plates via compression experiments and the finite element method. The results indicate that the trabecular-honeycomb core structure in beetle elytron plates can increase the compressive strength by approximately 50% and double the energy absorption capacity of honeycomb plates with the same material costs. Furthermore, the influence of three types of forming methods on the compressive properties of beetle elytron plates is investigated by comparing the different deformation modes of these structures with those of honeycomb plates. Based on these findings, application recommendations regarding the forming methods of beetle elytron plates are presented to facilitate the structural design and preparation techniques according to the performance requirements of different fields, which will accelerate the industrial application of these biomimetic structures.

Section: Introductionmentioning

confidence: 99%

Influence of honeycomb dimensions and forming methods on the compressive properties of beetle elytron plates

Zhang

Okabe

et al. 2017

“…Therefore, structures and materials that offer high-deformation energy absorption capabilities are in high demand due to their crashworthiness and impact resistance [1–3]. A type of lightweight, high-strength structure used for this purpose is the honeycomb plate [4–6], which has been used in various fields [7–9]. In nature, various species of beetles have survived since the age of dinosaurs.…”

Section: Introductionmentioning

confidence: 99%

Compression properties of metal beetle elytron plates and the elementary unit of the trabecular-honeycomb core structure

Zhang

Okabe

et al. 2017

This paper investigates the mechanical properties of metal beetle elytron plates (a type of biomimetic sandwich structure) and the elementary unit of the trabecular-honeycomb core structure by compression experiments. The following conclusions are drawn: (1) after reaching the compressive strength, the stress–strain curve of the beetle elytron plate contains a yield plateau that advantageously exploits the material strength of metal and its plastic deformation capacity; (2) the elementary unit of the core structure in beetle elytron plates is proposed explicitly based on the trabecular characteristic; and (3) this elementary unit remains relatively unchanged on the constraint condition of the trabecular structure and has high independence and stability when placed under out-of-plane compression. Thus, the yield plateau and variation tendency of the compressive strength after buckling of this elementary unit are highly consistent with that of the entire structure, which provides the basis for further research on the equivalent parameters and equivalent model of the beetle elytron plate and its trabecular-honeycomb core structure.

“…Honeycomb structures are commonly used in the design of lightweight, high-strength composites [1–6], with many applications in the fields of aerospace [7,8], transportation, and architecture [9]. In recent years, honeycomb structures have gained increasing importance in emergency projects, such as emergency bridges and temporary housing for victims after natural disasters (e.g.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the edgewise compressive mechanical properties of biomimetic fully integrated honeycomb plates

Tuo

Wei

et al. 2017

In the present study, the edgewise compressive mechanical properties of the biomimetic fully integrated honeycomb plates manufactured from short basalt fiber reinforced polymer are studied. The findings are as follows: (1) Fully integrated honeycomb plates are primarily characterized by compression failure of the non-perforated surface when bearing an edgewise compressive load. The fully integrated honeycomb plates clearly exhibit the features of plasticity. (2) A buckling failure mode of the upper or lower laminates is not observed in the fully integrated honeycomb plates, and the fully integrated honeycomb plates possess the ideal integrity. Additionally, the fully integrated honeycomb plates produced with 9-mm-long fibers have the greater shearing modulus of elasticity and good plastic deformation ability. These results are of significance for disaster prevention and safety in quakeproof applications. (3) The failure features, mechanical property parameters, and simple calculation formula for edgewise compression of fully integrated honeycomb plates obtained in this work provide a foundation for the prediction of edgewise compression and the design of fully integrated honeycomb plates in future engineering applications.