scholarly journals An Investigation on Low Velocity Impact Response of Multilayer Sandwich Composite Structures

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
S. Jedari Salami ◽  
M. Sadighi ◽  
M. Shakeri ◽  
M. Moeinfar
Keyword(s):  
Composite Structures ◽  
Sandwich Panel ◽  
Testing Machine ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Core Material ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Core

The effects of adding an extra layer within a sandwich panel and two different core types in top and bottom cores on low velocity impact loadings are studied experimentally in this paper. The panel includes polymer composite laminated sheets for faces and the internal laminated sheet called extra layer sheet, and two types of crushable foams are selected as the core material. Low velocity impact tests were carried out by drop hammer testing machine to the clamped multilayer sandwich panels with expanded polypropylene (EPP) and polyurethane rigid (PUR) in the top and bottom cores. Local displacement of the top core, contact force and deflection of the sandwich panel were obtained for different locations of the internal sheet; meanwhile the EPP and PUR were used in the top and bottom cores alternatively. It was found that the core material type has made significant role in improving the sandwich panel’s behavior compared with the effect of extra layer location.

Dynamic Response of Two-Core Sandwich Composite Structures under Impact

2008 ◽  
Vol 136 ◽  
pp. 115-124
Author(s):  
Da Zhi Jiang ◽  
Fu Biao Yang ◽  
Su Li Xing ◽  
Jia Yu Xiao
Keyword(s):  
Composite Structures ◽  
Sandwich Structure ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Velocity Impact ◽  
Local Displacement ◽  
The Core ◽  
Shear Strains ◽  
The Impact

Traditional sandwich structure consists of two face sheets and a core. With an internal sheet inserted into the core, a two-core sandwich structure is then formed. Two-core sandwich structures with composite laminated face sheets and a thin internal sheet subjected to low velocity impact are studied in this paper. Local displacement of the core under the point of impact is investigated. Simulated results show that the local displacement of the core along the direction of the impact has been decreased significantly by introducing the internal sheet into a traditional single sandwich structure and by reducing the space between the internal sheet and the impacted face sheet. Shear deformation in the cores of a two-core sandwich structure is also investigated and attention is focused on shear strains on interfaces between face/internal sheets and the cores. Results further show that strain levels in selected elements at the interested interfaces depend upon locations of the selected elements and arrangements of the internal sheet.

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.

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.

Scaling of low-velocity impact response in composite structures

2009 ◽  
Vol 91 (3) ◽  
pp. 358-365 ◽  
Author(s):  
Andreas P. Christoforou ◽  
Ahmet S. Yigit
Keyword(s):  
Composite Structures ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

Experimental Study on the Effects of Stacking Sequence on Low Velocity Impact and Quasi-Static Response of Foam Sandwich Composite Structures

2015 ◽  
Vol 18 (11) ◽  
pp. 1789-1805 ◽  
Author(s):  
Azzam Ahmed ◽  
Zhou Bingjie ◽  
Md. Hasan Ikbal ◽  
Wang Qingtao ◽  
Akampumuza Obed ◽  
...  
Keyword(s):  
Experimental Study ◽  
Composite Structures ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Stacking Sequence ◽  
Static Response ◽  
Low Velocity ◽  
Velocity Impact
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