Abstract
This paper aims to investigate the crashworthiness performance degradation of a damaged 5052 aluminum honeycomb panels under in-plane uniaxial quasi-static compression and the possibility of improving it using reinforcement tubes. The in-plane crushing behaviors and energy absorption capacities of the intact, damaged, and tube-reinforced damaged panels with different damage sizes in both X1 and X2 directions are numerically simulated by using the nonlinear FE method Abaqus/Explicit, and the crashworthiness performances are compared with each other. The validation of finite element model involves comparing the obtained simulation results with theoretical and experimental ones. Very good agreement between numerical, experimental, and theoretical results is achieved. The first maximum compressive load and the mean crushing load of the different honeycomb configurations are analyzed and compared through the load–strain curves. The energy absorption capacity of the damaged and the tube-reinforced damaged panels is calculated and then compared with their corresponding intact ones. The deformation modes are explained in detail. The obtained results show that the crashworthiness performance degradation is directly proportional to the damage size as well as the insertion of reinforcement tubes considerably improves in-plane crushing resistance of damaged honeycomb panels.
Highlights
Honeycomb structures are attractive candidates to be widely used in lightweight engineering design and energy absorbing applications, especially in the aerospace and automotive industries, due to their high stiffness-to-weight ratio, high strength-to-weight ratio, cost efficiency, multifunctionality, and extraordinary energy absorption capacity [1,2,3,4,5,6,7,8,9,10]
The results suggest that the energy absorption capacity of the honeycomb cally by Mozafari et al [33]
The main objective of presented numerical simulation of in-plane crushing of intact, damaged, and tube-reinforced damaged 5052 aerospace grade aluminum alloy honeycomb was to investigate the degradation of honeycomb panel characteristics as well as the possibility of improving it using reinforcement tubes with different thicknesses
Summary
Honeycomb structures are attractive candidates to be widely used in lightweight engineering design and energy absorbing applications, especially in the aerospace and automotive industries, due to their high stiffness-to-weight ratio, high strength-to-weight ratio, cost efficiency, multifunctionality, and extraordinary energy absorption capacity [1,2,3,4,5,6,7,8,9,10]. Mechanical behavior of honeycomb structure (Figure 1a) under quasi-static and dynamic compressive loading have been intensively studied, experimentally and numerically, in the out-of-plane direction (Figure 1b) [11,12,13,14,15] as well as in the in-plane direction (Figure 1c,d) [16,17,18,19,20,21,22,23]. Ashby [1] investigated the mechanical behavior of honeycomb structure in both out-of-plane and in-plane directions by detailed studying the micromechanics of the single cell. The 5052 expanded aerospace grade aluminum honeycomb materials are predominantly used in sandwich structures to meet design requirements for highly engineered structural components.
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