Quasi-Static Axial Compression Behavior and Energy Absorption Evaluation of Steel Foam-Filled Tubes

2020 ◽  
Vol 993 ◽  
pp. 863-868
Author(s):  
Chao Qun Guo ◽  
Tian Yao Wang ◽  
Tian Xiang Yuan ◽  
De Lin Ma ◽  
Yun Zhou ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Energy Absorption ◽  
Unit Volume ◽  
Deformation Mode ◽  
Absorbed Energy ◽  
Compression Behavior ◽  
Plateau Stress ◽  
Compressive Performance ◽  
Foam Filled ◽  
Steel Foam

The aim of this paper is to study the quasi-static axial compressive performance of newly developed steel foam-filled tubes (SFFTs). The energy absorption capability of steel foam-filled tubes was assessed. The results show that steel foam-filled tubes collapse in the axisymmetric-concertina deformation mode. The plateau stress of the plastic deformation of the steel foam-filled tubes decreases with the increase of porosity of steel foams, and is significantly higher than the sum of the identical steel foam and aluminum tube. The absorbed energy per unit volume of the steel foam-filled tubes is 8%~ 15% higher than the sum of those of identical aluminum tubes and steel foams with porosity ranging from 65% to 80%.

On the Crushing Behavior of Foam-Filled Composite Tubes under Compressive Loading

2012 ◽  
Vol 626 ◽  
pp. 1038-1041 ◽  
Author(s):  
Akbar Othman ◽  
Shahrum Abdullah ◽  
Ahmad Kamal Ariffin ◽  
Nik Abdullah Nik Mohamed ◽  
Helmi Rashid
Keyword(s):  
Energy Absorption ◽  
Wall Thickness ◽  
Peak Load ◽  
Compressive Loading ◽  
Absorbed Energy ◽  
Polymeric Foam ◽  
Foam Filled ◽  
Marine Applications ◽  
Crushing Behavior ◽  
Initial Peak

The present papers determine the effect of composite pultrusion square tubes E-glass polyester empty and polymeric foam-filled subjected to axial compressive loading. The specimens of square composite pultrusion were compressed experimentally under axial loadings to examine the effect of empty and polymeric foam-filled with different wall-thickness. The wall-thickness was used in this study were 2.1 and 2.4 mm. During the experimental observation, three characteristic crushing stages were identified as initial peak load, progressive crushing and compaction zone stages. The composite pultrusion square tube profile were analyzed and investigated in terms of crashworthiness parameters to meet the improvement of structural material widely used in automobile, aerospace and marine applications. Result obtained from experimental analysis such that initial peak load, mean load, energy absorption and specific energy absorption versus displacement curves were compared for each specimen. Results showed that the tubes energy absorption was affected significantly by different tube profile. It is also found that the polymeric foam-filled exhibit superb crashworthy structure on specific absorbed energy and the amount of initial peak load, mean load and absorbed energy recorded higher than the empty tube profiles.

scholarly journals Effects of Aluminum Foam Filling on Compressive Strength and Energy Absorption of Metallic Y-Shape Cored Sandwich Panel

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1670
Author(s):  
Leilei Yan ◽  
Pengbo Su ◽  
Yagang Han ◽  
Bin Han
Keyword(s):  
Energy Absorption ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Sandwich Structures ◽  
Deformation Mode ◽  
Metallic Foam ◽  
Filling Material ◽  
Specific Strength ◽  
Foam Filling ◽  
Foam Filled

The design of lightweight sandwich structures with high specific strength and energy absorption capability is valuable for weight sensitive applications. A novel all-metallic foam-filled Y-shape cored sandwich panel was designed and fabricated by using aluminum foam as filling material to prevent core member buckling. Experimental and numerical investigation of out-of-plane compressive loading was carried out on aluminum foam-filled Y-shape sandwich panels to study their compressive properties as well as on empty panels for comparison. The results show that due to aluminum foam filling, the specific structural stiffness, strength, and energy absorption of the Y-shape cored sandwich panel increased noticeably. For the foam-filled panel, aluminum foam can supply sufficient lateral support to the corrugated core and vertical leg of the Y-shaped core and causes a much more complicated deformation mode, which cannot occur in the empty panel. The complicated deformation mode leads to an obvious coupling effect, with the stress–strain curve of the foam-filled panel much higher than those of the empty panel and aluminum foam, which were tested separately. Metallic foam filling is an effective method to increase the specific strength and energy absorption of sandwich structures with lattice cores, making it competitive in load carrying and energy absorption applications.

Mechanical Behaviour and Energy Absorption Foam Filled Structures of Square Section under Compression Loading

2014 ◽  
Vol 592-594 ◽  
pp. 1109-1113 ◽  
Author(s):  
Dipen Kumar Rajak ◽  
L.A. Kumaraswamidhas ◽  
S. Das
Keyword(s):  
Energy Absorption ◽  
Mechanical Energy ◽  
Testing Machine ◽  
Aluminium Foam ◽  
Strain Rates ◽  
Universal Testing ◽  
Good Energy ◽  
Foam Filled ◽  
Steel Foam ◽  
Compressive Tests

The focus of this paper is to study the energy absorption characteristics of aluminium foam filled sections. The energy absorption capability of square mild steel foam filled and empty samples to absorbed mechanical energy have been estimated according to the results from the compressive tests. The tests were performed on the universal testing machine .The experimental results shows that aluminium foam filled sections feature have good energy absorption at various strain rates from 10-3/s to 10/s.

Failure Mechanism and Energy Absorption of Foam Filled Hybrid Aluminum-Glass/Epoxy Tubes under Three-Point Bending

2021 ◽  
Vol 888 ◽  
pp. 43-48
Author(s):  
Asad A. Khalid
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Cross Section ◽  
Absorbed Energy ◽  
Three Point Bending ◽  
Cross Section Area ◽  
Section Area ◽  
Bending Load ◽  
Aluminum Tubes ◽  
Foam Filled

Experimental work has been performed on the behaviour of glass/epoxy, aluminum, and aluminum-glass/epoxy empty and polyurethane foam filled tubes subjected to three-point bending. Tubes were of circular and square cross section area. Hand layup method was used to fabricate the tubes. Each tube is made of six layers. Inner diameter and total length of the tubes were 50 mm and 250 mm respectively. Bending load-displacement response, crush force efficiency, and absorbed energy were drawn and discussed. Effect of foam filler, material of the tube and stacking sequence on the maximum bending load was investigated. Energy absorption was determined and discussed. failure mode was investigated. It has been found that the polyurethane foam filler increased the maximum bending load and the energy absorption of the circular and square cross section area tubes. Using hybrid aluminum-glass/ epoxy enhanced the bending load and absorbed energy of the aluminum tubes. Cracks were observed at the upper and lower surfaces at the centre of the glass/epoxy tubes. While the aluminum tubes deformed significantly with either no cracking or with one crack appeared at the centre of the top surface of the tube.

scholarly journals Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2059
Author(s):  
Leilei Yan ◽  
Keyu Zhu ◽  
Yunwei Zhang ◽  
Chun Zhang ◽  
Xitao Zheng
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Energy Absorption ◽  
Unit Volume ◽  
Honeycomb Structure ◽  
Unit Mass ◽  
Out Of Plane ◽  
Foam Filling ◽  
3D Printed ◽  
Foam Filled

Polylactic acid (PLA) hexagonal honeycomb structures were fabricated by using 3D-printing technology. By filling with absorbent polymethacrylimide (PMI) foam, a novel absorbent-foam-filled 3D-printed honeycomb was obtained. The in-plane (L- and W-direction) and out-of-plane (T-direction) compressive performances were studied experimentally and numerically. Due to absorbent PMI foam filling, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass of absorbent-foam-filled honeycomb under L-direction were increased by 296.34%, 168.75%, 505.57%, and 244.22%, respectively. Moreover, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass, under W-direction, also have increments of 211.65%, 179.85, 799.45%, and 413.02%, respectively. However, for out-of-plane compression, the compressive strength and energy absorption per unit volume were enhanced, but the density has also been increased; thus, it is not competitive in energy absorption per unit mass. Failure mechanism and dimension effects of absorbent-foam-filled honeycomb were also considered. The approach of absorbent foam filling made the 3D-printed honeycomb structure more competitive in electromagnetic wave stealth applications, while acting simultaneously as load-carrying structures.

In-Plane Dynamics of Multilayer A-Type U-Shaped Corrugated Structure Materials

2012 ◽  
Vol 594-597 ◽  
pp. 937-941
Author(s):  
Yong Liu ◽  
De Qiang Sun ◽  
Xiao Yong Pan ◽  
Guo Hong Yao
Keyword(s):  
Energy Absorption ◽  
Impact Velocity ◽  
Evaluation Model ◽  
Dynamic Performance ◽  
Deformation Mode ◽  
Physical Analysis ◽  
Plateau Stress ◽  
Corrugated Structure ◽  
Fixed Cell ◽  
The Impact

The finite element methodology is conceived to obtain the mechanical parameters about dynamic performance of multilayer A-type U-shaped corrugated structure materials under the in-plane crushing loadings with various impact velocities. A simplified energy absorption model is proposed to evaluate the energy-absorption performance. The evaluation model shows that the optimal energy absorption per unit volume is mainly determined by the dynamic plateau stress. The homogeneous deformation mode, transition deformation mode and dynamic deformation mode are gradually observed with the increasing impact velocities. These three different deformation modes are presented in detail. The in-plane dynamic plateau stress depends on the impact velocity for the multilayer A-type U-shaped corrugated structure materials with a given fixed cell wall thickness. From the physical analysis and discussion of the numerical results, the empirical formula of dynamic plateau stress is suggested in terms of impact velocity.

Lateral Behaviors of Nested Tube Systems Under Quasi-Static Condition

2020 ◽  
Vol 12 (04) ◽  
pp. 2050046 ◽  
Author(s):  
TrongNhan Tran ◽  
Arameh Eyvazian ◽  
Quirino Estrada ◽  
DucHieu Le ◽  
NhatTan Nguyen ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Plastic Hinge ◽  
Superposition Principle ◽  
Compressive Load ◽  
Static Condition ◽  
Deformation Mode ◽  
Absorption Capacity ◽  
Analytical Models ◽  
Lateral Compression ◽  
Compression Behavior

A study is made to investigate the compression behavior of different nested tube systems made of mild steel under lateral compression. The nested tube systems including stacked groups of circular, rectangular and square tubes are built for application in narrow compressive zones. The deformation mode of these systems is observed and their lateral compression behavior are identified. The desirable stepwise energy absorption is obtained by designing the nested tube system. The load response revealed that there is no appearance of the peak compressive load in the case of a circular-circular tube (CCT) system, while a circular-rectangular tube (CRT) system offers bigger peak compressive load compared with that of a circular-square tube (CST). The energy absorptions of CCT and CRT systems are smallest and greatest, respectively. This study also estimates the energy absorption capacity of these system. By implementing the “plastic hinge line” concept of the modified simplified super folding element (MSSFE) theory and superposition principle, the analytical models predicting compressive load of the nested tube systems are introduced. The analytical investigations are compared with the data obtained from tests on these systems. Excellent correlation is observed between the theoretical and experimental data.

Fabrication, Structure and Property of Copper Foam

2018 ◽  
Vol 933 ◽  
pp. 41-48 ◽  
Author(s):  
Chao Qun Guo ◽  
Ya Dong Sun ◽  
Yun Zhou ◽  
Bo Xie ◽  
Tian Yao Wang ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Unit Volume ◽  
Volume Fraction ◽  
Absorption Efficiency ◽  
Plateau Stress ◽  
Structure And Property ◽  
Yield Plateau ◽  
Copper Foam ◽  
Energy Absorption Efficiency ◽  
Absorbing Material

Copper foams by using CaCl2 as space holder were successfully manufactured by sintering and dissolution process. The porosity ranges from 75% to 91%, and cell size from 0.3mm to 3.0m. The volume fraction of CaCl2 and sintering temperature are the main factors that affect porosity of copper foam. The yield plateau stress of copper foams with porosity between 75.88% and 90.19% is in range of 12.1~1.2MPa. The yield plateau stress decreases with the increase of porosity. The energy absorption per unit volume (W) copper foams with porosity between 75.88% and 90.19% is in range of 6.17~0.63MJ/m3. Under the condition of identical porosity, the absorption energy per unit volume (W) of copper foam is about 43% higher than aluminum foam. The maximum ideal energy absorption efficiency of copper foam is about 0.74, it indicates that the copper foam can be used as a good absorbing material.

Crush Response of Polyurethane Foam-Filled Aluminium Tube Subjected to Axial Loading

2014 ◽  
Vol 875-877 ◽  
pp. 534-541 ◽  
Author(s):  
Chawalit Thinvongpituk ◽  
Nirut Onsalung
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Testing Machine ◽  
Axial Loading ◽  
Asymmetric Mode ◽  
Pu Foam ◽  
Universal Testing ◽  
Collapse Mode ◽  
Empty Tube ◽  
Foam Filled

In this paper, the experimental investigation of polyurethane (PU) foam-filled into circular aluminum tubes subjected to axial crushing was presented. The purpose of this study is to improve the energy absorption of aluminium tube under axial quasi-static load. The aluminium tube was made from the AA6063-T5 aluminium alloy tubes. Each tube was filled with polyurethane foam. The density of foam was varied from 100, 150 and 200 kg/mP3P including with empty tube. The range of diameter/thickness (D/t) ratio of tube was varied from 15-55. The specimen were tested by quasi-static axial load with crush speed of 50 mm/min using the 2,000 kN universal testing machine. The load-displacement curves while testing were recorded for calculation. The mode of collapse of each specimen was analyzed concerning on foam density and the influence of D/t ratio. The results revealed that the tube with foam-filled provided significantly increment of the energy absorption than that of the empty tube. While the density of foam and D/t ratios increase, the tendency of collapse mode is transformed from asymmetric mode to concertina mode.

Compressive and Energy Absorption Behavior of Multilayered Foam Filled Tubes

2019 ◽  
Vol 50 (11) ◽  
pp. 5494-5509 ◽  
Author(s):  
M. Salehi ◽  
S. M. H. Mirbagheri ◽  
M. Arabkohi
Keyword(s):  
Energy Absorption ◽  
Foam Filled
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