Dynamic crushing behavior of multi-layered hybrid foam-filled composite graded lattice sandwich panels

In this present paper, the two square cross-section pultruded composite tubes E-glass reinforced polyester unfilled and polyurethane hybrid foam-filled subjected to oblique load are investigated and examined experimentally. The oblique angles were varied from 5 to 20 with an increment of every 5 degree. The bottom base platen of clamped specimen was adjusted inclination angle of loading direction with respect to the tube axis. During the experimental observation, three characteristic crushing stages were identified as initial peak load stage, progressive crushing stage and compaction zone stage. The pultruded composite tube wall-thicknesses of at 3 mm were examined, and the effects of crushing behaviors and failure modes were analyzed and discussed. Results showed that the tube’s energy absorption capability was affected significantly by varying of oblique loading. It is also found that as the filling polyurethane foam into pultruded E-glass reinforced polyester composite square tube increases the amount of specific absorbed energy than the empty tubes.

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Compressive characteristics of foam-filled composite egg-box sandwich panels as energy absorbing structures

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2009.11.010 ◽

2010 ◽

Vol 41 (3) ◽

pp. 427-434 ◽

Cited By ~ 19

Author(s):

S.H. Yoo ◽

S.H. Chang ◽

M.P.F. Sutcliffe

Keyword(s):

Sandwich Panels ◽

Foam Filled ◽

Energy Absorbing ◽

Filled Composite

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Numerical investigation on the dynamic response of foam-filled corrugated core sandwich panels subjected to air blast loading

Journal of Sandwich Structures & Materials ◽

10.1177/1099636217700350 ◽

2017 ◽

Vol 21 (3) ◽

pp. 838-864 ◽

Cited By ~ 18

Author(s):

Yuansheng Cheng ◽

Tianyu Zhou ◽

Hao Wang ◽

Yong Li ◽

Jun Liu ◽

...

Keyword(s):

Total Energy ◽

Energy Absorption ◽

Sandwich Panels ◽

Blast Loading ◽

Front Face ◽

Back Side ◽

Air Blast ◽

Foam Filled ◽

Blast Performance ◽

Air Blast Loading

The ANSYS/Autodyn software was employed to investigate the dynamic responses of foam-filled corrugated core sandwich panels under air blast loading. The panels were assembled from metallic face sheets and corrugated webs, and PVC foam inserts with different filling strategies. To calibrate the proposed numerical model, the simulation results were compared with experimental data reported previously. The response of the panels was also compared with that of the empty (unfilled) sandwich panels. Numerical results show that the fluid–structure interaction effect was dominated by front face regardless of the foam fillers. Foam filling would reduce the level of deformation/failure of front face, but did not always decrease the one of back face. It is found that the blast performance in terms of the plastic deflections of the face sheets can be sorted as the following sequence: fully filled hybrid panel, front side filled hybrid panel, back side filled hybrid panel, and the empty sandwich panel. Investigation into energy absorption characteristic revealed that the front face and core web provided the most contribution on total energy absorption. A reverse order of panels was obtained when the maximization of total energy dissipation was used as the criteria of blast performance.

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Free vibration and buckling of foam-filled composite corrugated sandwich plates under thermal loading

Composite Structures ◽

10.1016/j.compstruct.2017.03.051 ◽

2017 ◽

Vol 172 ◽

pp. 173-189 ◽

Cited By ~ 29

Author(s):

Bin Han ◽

Ke-Ke Qin ◽

Qian-Cheng Zhang ◽

Qi Zhang ◽

Tian Jian Lu ◽

...

Keyword(s):

Free Vibration ◽

Thermal Loading ◽

Sandwich Plates ◽

Foam Filled ◽

Filled Composite

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Mechanical performance of polyester pin-reinforced foam filled honeycomb sandwich panels

Science and Engineering of Composite Materials ◽

10.1515/secm-2017-0039 ◽

2018 ◽

Vol 25 (4) ◽

pp. 797-805 ◽

Cited By ~ 4

Author(s):

R.S. Jayaram ◽

V.A. Nagarajan ◽

K.P. Vinod Kumar

Keyword(s):

Mechanical Properties ◽

Mechanical Performance ◽

Flexural Rigidity ◽

Sandwich Panels ◽

Interfacial Strength ◽

Structural Performance ◽

Experimental Investigations ◽

Honeycomb Sandwich ◽

Foam Filled ◽

Pin Reinforcement

Abstract Honeycomb sandwich panels entice continuously enhanced attention due to its excellent mechanical properties and multi-functional applications. However, the principal problem of sandwich panels is failure by face/core debond. Novel lightweight sandwich panels with hybrid core made of honeycomb, foam and through-thickness pin was developed. Reinforcing polyester pins between faces and core is an effectual way to strengthen the core and enhance the interfacial strength between the face/core to improve the structural performance of sandwich panels. To provide feasibility for pin reinforcement, honeycomb core was pre-filled with foam. Mechanical properties enhancement due to polyester pinning were investigated experimentally under flatwise compression, edgewise compression and flexural test. The experimental investigations were carried out for both “foam filled honeycomb sandwich panels” (FHS) and “polyester pin-reinforced foam filled honeycomb sandwich panels” (PFHS). The results show that polyester pin reinforcement in foam filled honeycomb sandwich panel enhanced the flatwise, edgewise compression and flexural properties considerably. Moreover, increasing the pin diameter has a larger effect on the flexural rigidity of PFHS panels. PFHS panels have inconsequential increase in weight but appreciably improved their structural performance.

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