Quasi-Static Indentation Test on Composite Sandwich Panels with Foam Core

2013 ◽  
Vol 718-720 ◽  
pp. 214-218 ◽  
Author(s):  
Zong Hong Xie ◽  
Qun Yan ◽  
Jiang Tian ◽  
Xiao Yu Liu
Keyword(s):  
Experimental Studies ◽  
Sandwich Panels ◽  
Indentation Test ◽  
Foam Core ◽  
Damage Propagation ◽  
Indentation Force ◽  
Test Standards ◽  
Composite Sandwich ◽  
Static Indentation ◽  
Indentation Tests

In accordance to ASTM test standards, this paper presents experimental studies on quasi-static indentation tests on sandwich panels with carbon fiber reinforced facesheet and foam core. The indentation force vs. displacement curves were obtained. A series of tests with different indentation depth were carried out to study the damage modes and damage propagation process of foam core sandwich panels under quasistatic indentation force.

QUASI-STATIC INDENTATION TESTS ON POLYURETHANE AND PHENOLIC FOAM SANDWICH PANELS

2017 ◽  
Vol 13 (1) ◽  
pp. 15
Author(s):  
MUDASSIR SYED ◽  
HUSSAIN MANZOOR .M ◽  
SHANKAR RAVI.D.V. ◽  
◽  
◽  
...  
Keyword(s):  
Sandwich Panels ◽  
Phenolic Foam ◽  
Static Indentation ◽  
Indentation Tests

Quasi-static indentation tests on aluminium foam sandwich panels

2010 ◽  
Vol 92 (9) ◽  
pp. 2039-2046 ◽  
Author(s):  
Dong Ruan ◽  
Guoxing Lu ◽  
Yat Choy Wong
Keyword(s):  
Sandwich Panels ◽  
Aluminium Foam ◽  
Static Indentation ◽  
Indentation Tests

Loading Rate Effect on Flexural and Indentation Behaviour of Foam Core Composite Sandwich Panel

2014 ◽  
Vol 71 (2) ◽  
Author(s):  
Azwan S. ◽  
Yazid Yahya ◽  
B. Abdi ◽  
Amran Ayob
Keyword(s):  
Energy Absorption ◽  
Sandwich Panel ◽  
Loading Rate ◽  
Testing Machine ◽  
Foam Core ◽  
Three Point Bending ◽  
Loading Rates ◽  
Composite Sandwich ◽  
Indentation Tests ◽  
Chopped Strand Mat

The present study focuses on the flexural and the indentation behaviour of foam core sandwich panel subject to three point bending and indentation loading at different loading rates. The load-deflection, stress-deflection responses and energy absorption properties of foam core sandwich panel are determined experimentally. The foam core sandwich panel was fabricated using vacuum infusion process. The sandwich structure consists of chopped strand mat fibreglass skins and polyurethane foam core. The flexural and the indentation tests were conducted using Instron Universal Testing machine. It was found that loading rate influences the flexural and the indentation behaviours of foam core sandwich panel. By increasing the loading rate, the stiffness, strength and energy absorption of flexural and indentation of these structures were increased. 

Fracture Evaluation of Low-Density Porous Materials by Reaction Force Analysis in Ball Indentation Test

2017 ◽  
Author(s):  
Takayuki Ishino ◽  
Atsushi Sakuma
Keyword(s):  
Evaluation Method ◽  
Reaction Force ◽  
Indentation Test ◽  
Evaluation Procedure ◽  
Simple Formulation ◽  
Plateau Stress ◽  
Indentation Force ◽  
Material Evaluation ◽  
Indentation Tests ◽  
Ball Indentation Test

An indentation test can easily measure the deformation characteristics of a material, because it does not require a test specimen to be cut from the material being examined. The applicability of this test is usually restricted to evaluating the fundamental characteristics of deformation, such as elasticity and plasticity; however, it is also useful if the test can be applied for the fracture evaluation of materials. Therefore, in this study, the fracture behavior of materials is discussed by performing indentation tests. The evaluation procedure depends on the variation in the indentation force owing to the differences in the deformation behavior. The observed variation is analyzed via the fractography of the material. A simple formulation is derived from the results for the development of a material evaluation method. Finally, the importance of the choice of the indenter diameter is explained in terms of the accuracy of the plateau stress of the porous material.

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.

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