An experimental and numerical investigation of core damage size in honeycomb sandwich panels subject to low-velocity impact

2020 ◽  
Vol 254 ◽  
pp. 112739 ◽  
Author(s):  
D. Wowk ◽  
T. Reyno ◽  
R. Yeung ◽  
C. Marsden
Keyword(s):  
Numerical Investigation ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Core Damage ◽  
Honeycomb Sandwich

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.

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