Three-dimensional elastic-plastic pulse response and energy absorption of curved composite sandwich panel using DQ – Newmark method

The present study focuses on the flexural and the indentation behaviour of foam core sandwich panel subject to three point bending and indentation loading at different loading rates. The load-deflection, stress-deflection responses and energy absorption properties of foam core sandwich panel are determined experimentally. The foam core sandwich panel was fabricated using vacuum infusion process. The sandwich structure consists of chopped strand mat fibreglass skins and polyurethane foam core. The flexural and the indentation tests were conducted using Instron Universal Testing machine. It was found that loading rate influences the flexural and the indentation behaviours of foam core sandwich panel. By increasing the loading rate, the stiffness, strength and energy absorption of flexural and indentation of these structures were increased.

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INVESTIGATION ON ENERGY ABSORPTION OF ALUMINIUM FOAM-CFRP SANDWICH PANEL SUBJECTED TO IMPACT LOADING

Jurnal Teknologi ◽

10.11113/jt.v75.5226 ◽

2015 ◽

Vol 75 (8) ◽

Author(s):

Mohd Fadzli Ismail ◽

Aidah Jumahat ◽

Bulan Abdullah ◽

Ummu Raihanah Hashim ◽

Shafika Elia Ahmad Aseri

Keyword(s):

Energy Absorption ◽

Sandwich Panel ◽

Sandwich Panels ◽

High Strength ◽

Aluminium Foam ◽

Impact Properties ◽

Composite Sandwich ◽

Impact Tests ◽

Cfrp Composite ◽

The Impact

Sandwich panels are widely used in the fabrication of high strength low-weight structure that can withstand impact and blast loading especially for aerospace and automotive structures. Currently, aluminium foam is one of the lightweight materials used as a core in sandwich panels. The combination properties of core and face-sheet material are important to produce high strength and lightweight sandwich panel. This research is aimed to develop a carbon fibre reinforced polymer (CFRP) composite sandwich panel with aluminium foam as a core and study the impact properties of the structure. The preparations of the sandwich panel involved closed-cell aluminum foam as a core material and CFRP composite as the face-sheets. The impact tests were conducted using an Instron Dynatup 9250HV impact tester machine according to ASTM standard D3763 under constant impact velocity of 6.7m/s. The results of the impact tests showed that CFRP composite sandwich panel has better impact properties when compared to the other systems where it has higher specific energy absorption and longer impact time.

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Numerical evaluation of planar compression performances of composite sandwich panel with X-, Y-, and A-shaped core

Journal of Composite Materials ◽

10.1177/0021998320981142 ◽

2020 ◽

pp. 002199832098114

Author(s):

Yiru Ren ◽

Ningcong Wang ◽

Hongyong Jiang ◽

Zhihui Liu

Keyword(s):

Energy Absorption ◽

Numerical Evaluation ◽

Sandwich Panel ◽

Evaluation Model ◽

Damage Model ◽

Peak Load ◽

Absorption Efficiency ◽

Failure Behavior ◽

Potential Core ◽

Composite Sandwich

To understand the crucial effect of core, the mechanical performances of composite sandwich panel (CSP) with different core configurations are numerically evaluated under the planar compression loading. The failure behavior of metal core and fiber face-sheets are modeled with the ductile damage model and linear damage evolution model respectively. The numerical evaluation model validated with W-shaped core CSP is used to predict the mechanical behaviors and failure mechanisms of CSP with X-, Y- and A-shaped cores. The damage deformation, energy-absorption (EA) and energy absorption efficiency (EAE) are revealed to understand the compression performances, and effects of core thickness are further studied. Results show that the evaluation model is proved to be accurate due to a consistent match between simulated and available experimental results. It is found that compared to traditional W-shaped core, the CSPs with these three cores have higher resistance to deformation and energy absorption properties. Increasing the thickness of each core, the peak load, average load and EAE obviously increase but the stability decreases. The A-shaped core with enough thickness is recommended as the most potential core applied in composite sandwich structures.

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Quasi-Static Flexural and Indentation Behavior of Glass Fiber Reinforced Polymer Composite Sandwich Panel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.845.320 ◽

2013 ◽

Vol 845 ◽

pp. 320-323

Author(s):

Syed Azwan ◽

Behzad Abdi ◽

Yahya Mohd Yazid ◽

Ayob Amran

Keyword(s):

Strain Rate ◽

Glass Fiber ◽

Energy Absorption ◽

High Performance ◽

Sandwich Panel ◽

Indentation Test ◽

Complex Deformation ◽

Composite Sandwich ◽

Glass Fiber Reinforced ◽

Chopped Strand Mat

Recently, Composite Sandwich Panel (CSP) technology considerably influenced the design and fabrication of high performance structures. Although using CSP increases the reliability of structure, the important concern is to understand the complex deformation and damage evolution process. This study is focused on the flexural and indentation behavior of CSP made of chopped strand mat glass fiber and polyester matrix as face sheets and polyurethane foam as foam core subject to flexural and indentation loading condition. A setup of three-point bending and indentation test is prepared using different strain rates of 1mm/min, 10mm/min, 100mm/min and 500mm/min to determine the effects of strain rate on flexural and indentation behavior of CSP material. The load-extension, stress-extension response and energy absorption of the panel show the relation between the flexural and indentation behavior of panels to strain rate as by increasing the strain rate, the flexural properties and the energy absorption of panel are increased.

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Out-of-plane static compression and energy absorption of paper hierarchical corrugation sandwich panels

The Journal of Strain Analysis for Engineering Design ◽

10.1177/03093247211008566 ◽

2021 ◽

pp. 030932472110085

Author(s):

Huineng Wang ◽

Yanfeng Guo ◽

Yungang Fu ◽

Dan Li

Keyword(s):

Yield Strength ◽

Bearing Capacity ◽

Energy Absorption ◽

Sandwich Panel ◽

Second Order ◽

Compression Rate ◽

Static Compression ◽

First Order ◽

Out Of Plane ◽

Analytical Approaches

This study introduces the opinion of the corrugation hierarchy to develop the second-order corrugation paperboard, and explore the deformation characteristics, yield strength, and energy absorbing capacity under out-of-plane static evenly compression loading by experimental and analytical approaches. On the basis of the inclined-straight strut elements of corrugation unit and plastic hinge lines, the yield and crushing strengths of corrugation unit were analyzed. This study shows that as the compressive stress increases, the second-order corrugation core layer is firstly crushed, and the first-order corrugation structures gradually compacted until the failure of entire structure. The corrugation type has an obvious influence on the yield strength of the corrugation sandwich panel, and the yield strength of B-flute corrugation sandwich panel is wholly higher than that of the C-flute structure. At the same compression rate, the flute type has a significant impact on energy absorption, and the C-flute second-order corrugation sandwich panel has better bearing capacity than the B-flute structure. The second-order corrugation sandwich panel has a better bearing capacity than the first-order structure. The static compression rate has little effect on the yield strength and deformation mode. However, with the increase of the static compression rate, the corrugation sandwich panel has a better cushioning energy absorption and material utilization rate.

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The energy absorption behavior of novel composite sandwich structures reinforced with trapezoidal latticed webs

REVIEWS ON ADVANCED MATERIALS SCIENCE ◽

10.1515/rams-2021-0041 ◽

2021 ◽

Vol 60 (1) ◽

pp. 503-518

Author(s):

Juan Han ◽

Lu Zhu ◽

Hai Fang ◽

Jian Wang ◽

Peng Wu

Keyword(s):

Bearing Capacity ◽

Energy Absorption ◽

Sandwich Structure ◽

Ultimate Load ◽

Sandwich Structures ◽

Elastic Displacement ◽

Load Bearing Capacity ◽

Load Bearing ◽

Composite Sandwich ◽

Composite Sandwich Structures

Abstract This article proposed an innovative composite sandwich structure reinforced with trapezoidal latticed webs with angles of 45°, 60° and 75°. Four specimens were conducted according to quasi-static compression methods to investigate the compressive behavior of the novel composite structures. The experimental results indicated that the specimen with 45° trapezoidal latticed webs showed the most excellent energy absorption ability, which was about 2.5 times of the structures with vertical latticed webs. Compared to the traditional composite sandwich structure, the elastic displacement and ultimate load-bearing capacity of the specimen with 45° trapezoidal latticed webs were increased by 624.1 and 439.8%, respectively. Numerical analysis of the composite sandwich structures was carried out by using a nonlinear explicit finite element (FE) software ANSYS/LS-DYNA. The influence of the thickness of face sheets, lattice webs and foam density on the elastic ultimate load-bearing capacity, the elastic displacement and initial stiffness was analyzed. This innovative composite bumper device for bridge pier protection against ship collision was simulated to verify its performance. The results showed that the peak impact force of the composite anti-collision device with 45° trapezoidal latticed webs would be reduced by 17.3%, and the time duration will be prolonged by about 31.1%.

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Numerical and experimental investigation for enhancing the energy absorption capacity of the novel three-dimensional printed sandwich structures

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420721997490 ◽

2021 ◽

pp. 146442072199749

Author(s):

H Geramizadeh ◽

S Dariushi ◽

S Jedari Salami

Keyword(s):

Energy Absorption ◽

Sandwich Structures ◽

Three Dimensional ◽

Absorption Capacity ◽

The Novel ◽

Energy Absorption Capacity ◽

Fused Deposition ◽

Honeycomb Sandwich ◽

Out Of Plane ◽

Vertical Walls

The current study focuses on designing the optimal three-dimensional printed sandwich structures. The main goal is to improve the energy absorption capacity of the out-of-plane honeycomb sandwich beam. The novel Beta VI and Alpha VI were designed in order to achieve this aim. In the Beta VI, the connecting curves (splines) were used instead of the four diagonal walls, while the two vertical walls remained unchanged. The Alpha VI is a step forward on the Beta VI, which was promoted by filleting all angles among the vertical walls, created arcs, and face sheets. The two offered sandwich structures have not hitherto been provided in the literature. All models were designed and simulated by the CATIA and ABAQUS, respectively. The three-dimensional printer fabricated the samples by fused deposition modeling technique. The material properties were determined under tensile, compression, and three-point bending tests. The results are carried out by two methods based on experimental tests and finite element analyses that confirmed each other. The achievements provide novel insights into the determination of the adequate number of unit cells and demonstrate the energy absorption capacity of the Beta VI and Alpha VI are 23.7% and 53.9%, respectively, higher than the out-of-plane honeycomb sandwich structures.

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