The impact responses and the finite element modeling of layered trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich structures

Abstract

a b s t r a c tThe impact responses of brazed and adhesively bonded layered 1050 H14 trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich panels with 3003 and 1050 H14 aluminum alloy face sheets were investigated in a drop weight tower using spherical, flat and conical end striker tips. The full geometrical models of the tests were implemented using the LS-DYNA. The panels tested with spherical and flat striker tips were not penetrated and experienced slightly higher deformation forces and energy absorptions in 0°/90°corrugated layer orientation than in 0°/0°orientation. However, the panels impacted using a conical striker tip were penetrated/perforated and showed comparably smaller deformation forces and energy absorptions, especially in 0°/90°layer orientation. The simulation and experimental force values were shown to reasonably agree with each other at the large extent of deformation and revealed the progressive fin folding of corrugated core layers and bending of interlayer sheets as the main deformation mechanisms. The experimentally and numerically determined impact velocity sensitivity of the tested panels was attributed to the micro inertial effects which increased the critical buckling loads of fin layers at increasingly high loading rates.

Numerical Study on the Projectile Impact Resistance of Multi-Layer Sandwich Panels with Cellular Cores

“…Load fluctuation is observed during the interaction and with the bending and progressive deformation of the cell sheets, the force keeps increasing. This phenomenon is also observed by ) (Xiong, et al, 2012) ( Kılıçaslan, et al, 2013) (Fan, et al, 2014). Notably, the interaction time before that projectile is rebounded from corrugation sandwich panel is extended by increasing layer numbers in lower relative density As to hexagonal honeycomb sandwich panels, increasing layer numbers can not only noticeably lower force values of structures during impact but also prolong interaction time as shown in Figure 13.…”

“…Xiong et al (2012) have conducted the quasi-static uniform compression and low-velocity concentrated impact tests and found bi-layer carbon fiber composite pyramidal truss cores have comparable specific energy absorption compared with glass fiber woven textile truss cores. Similar multi-layer structures have been exploited to improve the energy absorption of sandwich panels Kılıçaslan, et al, 2013;Li, et al, 2015). Li et al (2016) have investigated experimentally and numerically on the response of metallic sandwich panels with stepwise graded aluminum honeycomb cores under blast loading.…”

Sandwich Structure Based On Corrugated-Core: A Review

“…The finite element modeling (FEM) and the impact responses of stacked trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich structures was studied by Kiliçaslan et al [31]. Thill et al [32] investigated about trapezoidal corrugated aramid/epoxy laminates under huge tensile displacements transverse to the corrugation direction.…”

Effect of varying geometrical parameters of trapezoidal corrugated-core sandwich structure

“…Sandwich structures comprising of face-sheets and cores are broadly used in transportation vehicles and civil infrastructure due to their high stiffness/strength-to-weight ratio [2][3][4][5][6][7][8][9][10]. Sandwich structures have numerous topologies in different material-e.g composite corrugated-core, metallic core, or metallic textile core [10][11][12][13][14]. Sandwich structures have different core material including the shape.…”