Prediction of Crushing Response for Metal Hexagonal Honeycomb under Quasi‐Static Loading

Abstract

To provide a theoretical basis for metal honeycombs used for buffering and crashworthy structures, this study investigated the out-of-plane crushing of metal hexagonal honeycombs with various cell specifications. The mathematical models of mean crushing stress and peak crushing stress for metal hexagonal honeycombs were predicted on the basis of simplified super element theory. The experimental study was carried out to check the accuracy of mathematical models and verify the effectiveness of the proposed approach. The presented theoretical models were compared with the results obtained from experiments on nine types of honeycombs under quasi-static compression loading in the out-of-plane direction. Excellent correlation has been observed between the theoretical and experimental results.

Theoretical Modeling and Mechanical Characterization at Increasing Temperatures under Compressive Loads of Al Core and Honeycomb Sandwich

“…Equation (11) has been shown to have low accuracy, especially for honeycombs that are too dense. Better precision has been found with the relationship suggested by Geng [23], with an energetic approach applied to a "Y" cell. For hexagonal regular cells, the following can be found:…”

“…The initial trend of the curve is quasi-linear because after reaching the elastic limit of stability, a region is reached in which bending stresses reduce the stiffness of the wall up to the peak stress [16]. The mathematical model proposed here overestimates this limit; so, in the proposed model, the instability load is considered with a reasonable theoretical approximation of σ * pk,3 [23]. The critical instability load (P) acting on a single wall (side "l") can be derived by using the classical theory of Timoshenko [24] for the instability of thin sheets homogeneously compressed along a direction:…”

Effect of auxetic honeycomb angular stiffeners in cold-formed perforated and webbed steel upright section under buckling modes

“…(Mohr and Doyoyo, 2004) investigated the wide plastic deflection of the honeycomb structures in the early 1960's. (Geng et al, 2018) explored the semi empirical relationship to resist the mean crushing force of hexagon honeycombs to the width, thickness of the cell wall and the yield stress of material. (Yamashita and Gotoh, 2005) proposed the dynamic characteristics of in-plane and outplane deformation modes in regular honeycombs.…”

Crashworthiness Optimization Design of Aluminum Alloy Thin-Walled Triangle Column Based on Bioinspired Strategy

“…Aerospace, elevator, automotive, offshore structures, and liquid storage tanks inevitably use energy absorbers [1][2][3][4][5][6]. Different section shapes of aluminum alloy thin-walled structures such as square and hexagonal have been well documented [7,8], and the majority of research focuses on the even sides. However, odd sides' tubes such as triangular are also widely used in bridges and buildings et al Therefore, more attention has been paid to study these structures in recent years.…”