Local displacement of core in two-layer sandwich composite structures subjected to low velocity impact

2005 ◽  
Vol 71 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Dazhi Jiang ◽  
Dongwei Shu
Keyword(s):  
Composite Structures ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Velocity Impact ◽  
Local Displacement

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.

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.

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

Low-velocity impact studies on GFRP and hybrid composite structures

2020 ◽  
Vol 12 (3-4) ◽  
pp. 125-141
Author(s):  
Harshavardhan Shetty ◽  
D. Sethuram ◽  
B. Rammohan ◽  
P. R. Budarapu
Keyword(s):  
Hybrid Composite ◽  
Composite Structures ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Studies

Impact Damage Research of Sandwich Composite Laminates

2013 ◽  
Vol 710 ◽  
pp. 136-141
Author(s):  
Li Jun Wei ◽  
Fang Lue Huang ◽  
Hong Peng Li
Keyword(s):  
Compressive Strength ◽  
Composite Laminates ◽  
Impact Damage ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Compression Process ◽  
Velocity Impact ◽  
Residual Compressive Strength ◽  
Core Materials

Sandwich composite laminates structure is a classic application of composite material on actual aircraft structural. Dealing with low-velocity impact damage and residual compressive strength of sandwich composite laminates, explicit finite element method of ABAQUS/Explicit software was adopted to simulate low-velocity impact and compression process. Impact response and invalidation on compression between sandwich composite laminates with different core materials and regular composite laminates were compared. The simulation results indicated that softer core materials can absorb more impact energy, reduce the structure damage and enhance the residual compressive strength after impact.

Low velocity impact analysis on composite structures – A review

2018 ◽  
Author(s):  
Shreekant Patil ◽  
D. Mallikarjuna Reddy ◽  
Munirami Reddy
Keyword(s):  
Composite Structures ◽  
Impact Analysis ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact
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