Compression after impact behavior of composite foam-core sandwich panels

2019 ◽  
Vol 225 ◽  
pp. 111181 ◽  
Author(s):  
Ruixiang Bai ◽  
Jingjing Guo ◽  
Zhenkun Lei ◽  
Da Liu ◽  
Yu Ma ◽  
...  
Keyword(s):  
Sandwich Panels ◽  
Impact Behavior ◽  
Foam Core ◽  
Composite Foam ◽  
Compression After Impact

scholarly journals Soft body impact resistance of composite foam core sandwich panels with unidirectional corrugated and tubular reinforcements

2019 ◽  
Vol 132 ◽  
pp. 103320 ◽  
Author(s):  
Rade Vignjevic ◽  
James Campbell ◽  
Kevin Hughes ◽  
Michał Orłowski ◽  
Serafina Garcea ◽  
...  
Keyword(s):  
Impact Resistance ◽  
Sandwich Panels ◽  
Foam Core ◽  
Soft Body ◽  
Composite Foam

scholarly journals The low-velocity impact and compression after impact (CAI) behavior of foam core sandwich panels with shape memory alloy hybrid face-sheets

2019 ◽  
Vol 26 (1) ◽  
pp. 517-530 ◽  
Author(s):  
Ye Wu ◽  
Yun Wan
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Sandwich Panels ◽  
Image Correlation ◽  
Low Velocity Impact ◽  
Foam Core ◽  
Low Velocity ◽  
Velocity Impact ◽  
Compression After Impact ◽  
The Impact

AbstractDue to the properties of shape memory effect and super-elasticity, shape memory alloy (SMA) is added into glass fiber reinforced polymer (GFRP) face-sheets of foam core sandwich panels to improve the impact resistence performance by many researchers. This paper tries to discuss the failure mechanism of sandwich panels with GF/ epoxy face-sheets embedded with SMA wires and conventional 304 SS wire nets under low-velocity impact and compression after impact (CAI) tests. The histories of contact force, absorbed energy and deflection during the impact process are obtained by experiment. Besides, the failure modes of sandwich panels with different ply modes are compared by visual inspection and scanning electron microscopy (SEM). CAI tests are conducted with the help of digital image correlation (DIC) technology. Based on the results, the sandwich panels embedded with SMA wires can absorb more impact energy, and show relatively excellent CAI performance. This is because the SMA wires can absorb and transmit the energy to the outer region of GFRP face-sheet due to the super-elasticity-behavior. The failure process and mechanism of the CAI test is also discussed.

An Experimental Investigation on Composites Through-The-Thickness Stitched Foam Core Sandwich Panels

2007 ◽  
Vol 353-358 ◽  
pp. 1443-1446 ◽  
Author(s):  
Qin Sun ◽  
Xi Tao Zheng ◽  
Ye Li ◽  
Ya Nan Chai ◽  
Zheng Hua Cao
Keyword(s):  
Damage Tolerance ◽  
Sandwich Structures ◽  
Low Cost ◽  
Sandwich Panels ◽  
Mechanical Tests ◽  
Impact Testing ◽  
Compression Testing ◽  
Foam Core ◽  
Composite Sandwich ◽  
Compression After Impact

This study explored the feasibility and potential benefits provided by the addition of through-the-thickness reinforcement to foam core sandwich structures. Through-the-thickness stitching is proposed to increase the interlaminar strength and damage tolerance of composite sandwich structures. A low-cost, out-of-autoclave processing method was developed to produce composite sandwich panels with carbon fiber face sheets, a closed-cell foam core, and through-the-thickness Kevlar stitching. The sandwich panels were stitched in a dry preform state, vacuum bagged, and infiltrated using Vacuum Assisted Resin Transfer Molding (VARTM) processing. For comparison purposes, unstitched sandwich panels were produced using the same materials and manufacturing methodology. Five types of mechanical tests were performed: flexural testing, flatwise tensile and compression testing, core shear testing, and edgewise compression testing. Drop-weight impact testing followed by specimen sectioning was performed to characterize the damage resistance of stitched sandwich panels. Compression after impact (CAI) testing was performed to evaluate the damage tolerance of the sandwich panels. Results show significant increases in the flexural stiffness and strength, out-of-plane tensile strength, core shear strength, edgewise compression strength, and compression-after-impact strength of stitched sandwich structures.

High-velocity perforation behaviour of sandwich panels with Al/SiCp composite foam core

2019 ◽  
Vol 54 (11) ◽  
pp. 1483-1495
Author(s):  
M Golestanipour ◽  
A Babakhani ◽  
S Mojtaba Zebarjad
Keyword(s):  
High Velocity ◽  
Sandwich Panels ◽  
Sheet Thickness ◽  
Foam Core ◽  
Ballistic Limit ◽  
Absorbed Energy ◽  
Composite Foam ◽  
Good Energy ◽  
Energy Absorbers ◽  
Energy Absorbing

Aluminium foam core sandwich panels are good energy absorbers for impact protection applications, such as light-weight structural panels, packing materials and energy absorbing devices. In this study, the high-velocity perforation response of a range of sandwich panels with Al A356/SiCp composite foam core and 1100 aluminium face-sheets has been investigated using a conventional gas gun. Impact perforation tests were carried out using a 10-mm diameter conical nosed indenter at velocities up to that required to achieve complete perforation of the target (i.e. 230 m/s). The effects of face-sheet thickness, density and thickness of aluminium composite foam core on the total, specific and extra absorbed energy and also ballistic limit of the panels during impact penetration were experimentally investigated. During test, top face-sheets globally bended and tore into several pieces and so absorbed part of impact energy. Rupture and densification are two deformation modes and energy absorption mechanisms of foam core. Localized indentation and tearing, global bending and delamination were also observed on back face-sheets. Higher foam core density and thickness and also thicker face-sheets resulted in higher absorbed energy and ballistic limit.

Impact behavior of natural rubber based syntactic foam core sandwich structures

2021 ◽  
Vol 63 (11) ◽  
pp. 1052-1057
Author(s):  
Harun Güçlü ◽  
Hasan Kasım ◽  
İ. Kürşad Türkoğlu ◽  
Yücel Can ◽  
Murat Yazıcı
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Natural Rubber ◽  
Adhesive Bonding ◽  
Syntactic Foam ◽  
Sandwich Panels ◽  
Impact Behavior ◽  
Foam Core ◽  
Element Analysis ◽  
The Impact

Abstract In this study, the impact behavior of sandwich panels of natural rubber-based syntactic foam cores with aluminum face sheets was investigated experimentally and with the help of finite element analysis (FEA). Syntactic foam cores were produced byadding glass bubbles (GB) to the natural rubber (NR). Natural rubber was dissolved at room temperature with chemical solvents mixed with glass bubbles at 10, 20, and 30 weight percentages. Very low density (~0.8 g × cm-3) and high compressible foams were obtained depending on the GB weight percentages. Aluminum face sheets and the NR/GB syntactic foam core developed were joined by adhesive bonding to produce sandwich beam specimens. The sandwich beams manufactured in this way were subjected to impact loading under three-point bending boundary conditions experimentally. The experimental results were compared with finite element simulation results under the same loading and boundary conditions. The damage mechanism of the sandwich panels devised were analyzed. According to the results, natural rubber containing an additive of 20 wt.-% GBs showed better impact resistance than the others.

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