A Study on Low-Velocity Impact Characterization of Honeycomb Sandwich Panels According to the Changes of Impact Location and Core Fabrication Angles

2009 ◽  
Vol 33 (1) ◽  
pp. 64-71 ◽  
Author(s):  
Kwang-Woo Jeon ◽  
Kwang-Bok Shin ◽  
Hee-Young Ko ◽  
Dae-Hwan Kim
Keyword(s):  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Location ◽  
Honeycomb Sandwich

Experimental Investigation Into the Effect of Impact Loading on the Response of Metallic Trapezoidal Corrugated Core Sandwich Panels

2018 ◽  
Author(s):  
Haifu Yang ◽  
Yuansheng Cheng ◽  
Pan Zhang ◽  
Jun Liu ◽  
Kai Chen
Keyword(s):  
Dynamic Response ◽  
Impact Energy ◽  
Impact Loading ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Front Face ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Location ◽  
The Impact

Sandwich structures with corrugated cores have attracted a lot of interest from industrial and academic fields due to their superior crashworthiness. In this paper, the dynamic response of metallic trapezoidal corrugated core sandwich panels under low-velocity impact loading is studied by conducting drop hammer impact testing. The sandwich panels composed of two thin face skins and trapezoidal corrugated core, were designed and fabricated through folding and laser welding technology. Main attention of present study was placed at the influences of the impact energy, impactor diameter and impact location on the impact force, deformation mechanisms and the permanent deflections of the trapezoidal corrugated core sandwich panels. Results revealed that the impact energy has significant effects on the dynamic response of the sandwich panel, whereas the impact diameter has little effects on it. The deformation mode of the front face sheet differs sharply when the impact location is different. The middle unit cell of corrugated core is compressed to the “M” shape under different low-velocity impact loading.

Low velocity impact and compression after impact behaviour of polyester pin-reinforced foam filled honeycomb sandwich panels

2021 ◽  
pp. 109963622199818
Author(s):  
RS Jayaram ◽  
VA Nagarajan ◽  
KP Vinod Kumar
Keyword(s):  
Impact Damage ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Damage Area ◽  
Compression After Impact ◽  
Honeycomb Sandwich ◽  
Foam Filled ◽  
The Impact

Hybridization of sandwich panels and their different components have drawn huge attention due to the significant improvement in their attributes. Hybrid core of ‘Polyester Pin-reinforced Foam filled Honeycomb Sandwich panels’ (PFHS) were fabricated and compared with unreinforced ‘Foam filled Honeycomb Sandwich panels’ (FHS) in terms of low velocity impact and Compression After Impact (CAI) performance. The impact damage area was calculated by employing MATLAB image processing technique. Incorporating through thickness pins for connecting faces and core is an effectual way to improve interfacial bonding, specific bending stiffness and also imparts out of plane properties for sandwich panels. The low velocity impact tests performed on the sandwich panels revealed that the polyester pin reinforcement in foam filled honeycomb sandwich panel improved the load bearing capacity, total absorbed energy and reduced the impact damage area significantly. In CAI test, debond, wrinkling of face sheet, and buckling of face sheet and core are the major modes of failure. The addition of the pins enhanced the compressive strength for all the impact energy levels.

Investigation on Shock Response of Magnesium Alloy Honeycomb Sandwich Panels under Low Velocity Impact Loading

2011 ◽  
Vol 675-677 ◽  
pp. 547-550
Author(s):  
Hong Yang Zhao ◽  
Dong Ying Ju ◽  
Yasumi Ito ◽  
Tetsuya Nemoto ◽  
Yoshie Takahashi
Keyword(s):  
Magnesium Alloy ◽  
High Speed ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Dynamic Force ◽  
Low Velocity ◽  
Velocity Impact ◽  
Honeycomb Sandwich ◽  
Shock Response ◽  
The Impact

This paper describes the results of an experimental investigation on the drop off impact test on a range of sandwich panels. The magnesium alloy sandwich panels were fabricated with rolled sheets at different thickness by pressing and bonding method. Out-plane compression test was employed to obtain its basic deformation-force behavior. The impact experiments were carried out in which a steel cylinder was dropped off at various height levels, ranging from 0.5m to 1.5 cm to impact the panel. A high speed camera was employed to take pictures at 20 thousand frames per second and the low-velocity impact response on the sandwich panels is recorded with a dynamic force senor under the panel simultaneously. The shock response with time and the impact absorption energy were analyzed and compared. The results of this study proved that the magnesium alloy honeycomb sandwich panels have good impact energy absorption performance.

scholarly journals Damage Characterization of Polypropylene Honeycomb Sandwich Panels Subjected to Low-Velocity Impact

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Freeda A. Amir ◽  
A. R. Othman ◽  
H. Md. Akil
Keyword(s):  
Low Velocity Impact ◽  
Load History ◽  
Low Velocity ◽  
Velocity Impact ◽  
Optical Surfaces ◽  
Complex Interactions ◽  
Honeycomb Sandwich ◽  
Post Test ◽  
Total Failure

The post-test deformation and failures of sandwich composites may involve complex interactions between various failure mechanisms. In this study, the extent of impact damages and response of the thermoplastic honeycomb sandwich are analysed through energy profile diagrams and associated load history curves. The degree of the postimpact damages of the sandwich is further characterized using an optical surfaces metrology analysis. The thickness of the honeycomb was found to influence the extent of the damage which occurred following the low-velocity impact. Thicker core was able to sustain a higher load as well as the energy absorption before total failure occurred.

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