Low-velocity impact response of composite sandwich structures: Modelling and experiment

2017 ◽  
Vol 168 ◽  
pp. 322-334 ◽  
Author(s):  
Yuan Chen ◽  
Shujuan Hou ◽  
Kunkun Fu ◽  
Xu Han ◽  
Lin Ye
Keyword(s):  
Sandwich Structures ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Composite Sandwich ◽  
Composite Sandwich Structures

NUMERICAL MODEL OF TUBULAR COMPOSITE SANDWICH STRUCTURES UNDER LOW-VELOCITY IMPACT

2021 ◽  
Author(s):  
CHAO ZHANG ◽  
ISAIAH KAISER ◽  
K. T. TAN
Keyword(s):  
Sandwich Structures ◽  
Matrix Cracking ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Core Material ◽  
Low Velocity ◽  
Damage Mechanisms ◽  
Velocity Impact ◽  
Composite Sandwich ◽  
Composite Sandwich Structures

This study aims to investigate the dynamic impact response of tubular composite structures with honeycomb sandwich core under transverse low-velocity impact (LVI) test. We establish a finite element analysis (FEA) model of composite sandwich structures. Simulation results are compared with experimental results to verify the correctness of the model and analysis method. This model can accurately predict the impact response and damage mechanisms of a composite sandwich structure, as validated by experimental testing, specifically capturing major failure modes. LVI experiments are conducted utilizing cylindrical impact striker to enact both point and line impact. Damage mechanisms, such as matrix cracking, delamination, and fiber breakage/rupture, occur in the facesheet, as well as honeycomb crushing and breakage in the core. The combination of experimental and numerical results illustrates the effects of facesheet thickness and core thickness on failure mechanisms. A three-dimensional model can also be used to clearly visualize the effect of different core material properties on the failure mechanism and dynamic response during an impact event.

Low Velocity Impact Response of Composite/Sandwich Structures

2016 ◽  
Vol 725 ◽  
pp. 127-131 ◽  
Author(s):  
Kumar V. Akshaj ◽  
P. Surya ◽  
M.K. Pandit
Keyword(s):  
Sandwich Structures ◽  
Weight Ratio ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Core Material ◽  
Design Parameters ◽  
Low Velocity ◽  
Velocity Impact ◽  
Composite Sandwich ◽  
Set Up

Dent resistance of structures is one of the important design parameters to consider in automotive, aerospace, packaging and transportation of fragile goods, civil engineering and marine industries. It is important to study the dynamic impact response of various combinations of skin and core materials which can provide desired fracture toughness and highest strength to weight ratio for such applications. This paper discusses the low velocity impact response of sandwich structures having unique combination of mild steel as skin material bonded to thermoplastics/PU foam as core material. HDPE, LDPE and polypropylene were the choice of thermoplastics and an optimum combination of materials for the sandwich structure was evaluated using drop-weight experimental set up. It is observed that LDPE is the best choice of core material for the sandwich structures considered.

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