Impact behavior and energy absorption of paper honeycomb sandwich panels

2009 ◽  
Vol 36 (1) ◽  
pp. 110-114 ◽  
Author(s):  
Dongmei Wang
Keyword(s):  
Energy Absorption ◽  
Sandwich Panels ◽  
Impact Behavior ◽  
Honeycomb Sandwich ◽  
Paper Honeycomb

Selection of Fitting Models of the Moisture Content for Paper Honeycomb Sandwich Panel

2012 ◽  
Vol 200 ◽  
pp. 58-61
Author(s):  
Dong Mei Wang
Keyword(s):  
Experimental Data ◽  
Moisture Content ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
Influence Of Temperature ◽  
Honeycomb Sandwich ◽  
Best Fitting ◽  
Paper Honeycomb ◽  
Fitting Model ◽  
Selection Of

The influence of temperature and relative humidity on the moisture content of paper honeycomb sandwich panels was studied. The moisture content of paper honeycomb sandwich panels was fitted by three mathematical models. The fitting results were evaluated by experimental data, and the best fitting model and its parameters were determined. The results indicate that in three models, the GAB (Guggenheim, Anderson and De Boer) model is the best suited to predict the moisture content of paper honeycomb sandwich panels in different temperature and humidity conditions.

Compression after impact behavior of titanium honeycomb sandwich structures

2017 ◽  
Vol 20 (5) ◽  
pp. 639-657 ◽  
Author(s):  
Wei Zhao ◽  
Zonghong Xie ◽  
Xiang Li ◽  
Xishan Yue ◽  
Junfeng Sun
Keyword(s):  
Failure Modes ◽  
Sandwich Structures ◽  
Impact Damage ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Failure Strength ◽  
Compressive Failure ◽  
Low Velocity ◽  
Honeycomb Sandwich

Titanium honeycomb sandwich structures are gradually used in several newly developed aircrafts in China. During the manufacturing process and aircraft service life, low-velocity impacts from foreign objects (typically stones, tools and hails, etc.), would quite likely happen and could not be completely avoided. In order to evaluate the influence of low-velocity impact damage on titanium honeycomb sandwich structures, unidirectional in-plane compression tests on both intact and impact damaged sandwich panels were conducted to obtain their failure modes and compressive failure strength. Test results showed that the low-velocity impact damage could cause the change in failure modes and a 9% to 15% decrease in the compressive failure strength. Different impact energy levels showed a limited influence on the compressive failure strength. Numerical analysis was conducted to study the compression after impact behavior of titanium sandwich panels. Parametric finite element models that contained all the geometric and the structural details of honeycomb core cells, as well as the indentation and the crushed core region, were developed in the analysis. The numerical results successfully exhibited the failure process of the intact and impact damaged titanium sandwich panels subjected to unidirectional in-plane compression, similar to what observed in the tests. The predicted compressive failure strength also agreed very well with the test data.

Energy absorption diagrams of paper honeycomb sandwich structures

2009 ◽  
Vol 22 (2) ◽  
pp. 63-67 ◽  
Author(s):  
Dong-Mei Wang ◽  
Zhi-Wei Wang ◽  
Qiang-Hua Liao
Keyword(s):  
Energy Absorption ◽  
Sandwich Structures ◽  
Honeycomb Sandwich ◽  
Paper Honeycomb

Research on Energy Absorption Characteristics of Honeycomb Sandwich Panels

2011 ◽  
Vol 299-300 ◽  
pp. 30-33
Author(s):  
Shu Juan Hou ◽  
Li Li Ren ◽  
Duo Dong
Keyword(s):  
Optimal Design ◽  
Energy Absorption ◽  
Optimization Design ◽  
Sandwich Panels ◽  
Weight Ratio ◽  
Vehicle Body ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
Honeycomb Sandwich ◽  
Absorption Characteristics

Due to the excellent mechanical properties combined with high strength to weight ratio, honeycomb sandwich panels (HSP) are used increasingly in aerospace, automobile and marine industries. In order to improve the crashworthiness of vehicle body, it is of great significance to study the energy absorption characteristics of the components. For this reason, specific energy absorption (SEA: the energy absorption per unit mass) of HSP was selected to be the objective function in order to find an optimal design of HSP under impact loading. The explicit finite element analysis (FEA) was used to derive response surface (RS) model of SEA, and a single-objective optimization was performed to get the optimal design. Before the optimization design of HSP, the energy-absorptions of HSP and the honeycomb core (HC) were compared with each other. It was found that HSP could absorb much more impact energy than HC due to the stabilizing effect of the face sheets during the process of crushing.

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