Mechanical behavior of resin pin-reinforced composite sandwich panels under quasi-static indentation and three-point bending loading conditions

Abstract

This paper reports the mechanical behavior of resin pin-reinforced composite sandwich panels made from polyvinyl chloride core and glass/epoxy face sheets under indentation of a hemispherical indenter and three-point bending loading conditions. The goal was to study the effects of reinforcing parameters such as the number, arrangement, and diameter of the through-the-thickness resin pins on the indentation maximum load, the bending strength, and energy absorption characteristics of the tested samples under these loading conditions. The results revealed that using the resin pins to reinforce the polyvinyl chloride foam core led to increase the indentation maximum load up to 47%, and the maximum bending load up to 34%, compared to nonreinforced foam–core sandwich structures. Also, the presence of resin pins led to the change in the failure modes of specimens (i.e. from local to global deformation and failure) and consequently increased the energy absorption capability of sandwich structures by 31% and 68% respectively under indentation and bending loads.

Optimization for multi-cell thin-walled tubes under quasi-static three-point bending

“…The researchers have examined the three-point bending test of energy absorbers under dynamic load [28] or quasistatic conditions [31][32][33]. In order to evaluate the crashing performances of multi-cell thin-walled structures, the finite element (FE) model of the tubes under the quasi-static three-point bending is established using explicit nonlinear finite element code RADIOSS [34].…”

Quasi-static and low-velocity impact behavior of the bio-inspired hybrid Al/GFRP sandwich tube with hierarchical core: Experimental and numerical investigation

“…In the design of suchsensitive elements as the loading conditions, the geometry of the section and the type ofmaterial are the major considerations [6][7][8][9][10]. In recent decades, many scientists have considered the effect of these elements on the energy absorption behavior of axially crushed profiles experimentally, numerically, and analytically [11][12][13][14][15][16][17][18]. With regard to the geometry, studies have unanimously recognized that thin-walled circular sections show incomparably the best energy absorption behavior [3,[19][20][21][22], which is depends heavily on the type of material in theprofile.…”

Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluation

“…Other examples of innovation in the design of sandwich cores include shearkeying [15], tube-reinforced foam [16], composite rods [17], polymer/resin pins [18][19][20] and hybrid divided cores [21].…”