scholarly journals Dynamic axial crushing Test to Thin-Walled Circular Tube Specimen and Evaluation of Its Energy Absorption Ability.

1999 ◽  
Vol 65 (635) ◽  
pp. 1622-1628
Author(s):  
Shinji TANIMURA ◽  
Koji MIMURA ◽  
Yuichi ISHIKAWA ◽  
Tsutomu UMEDA
Keyword(s):  
Energy Absorption ◽  
Circular Tube ◽  
Axial Crushing ◽  
Thin Walled

scholarly journals Energy Absorption Characteristics of a CFRP-Al Hybrid Thin-Walled Circular Tube under Axial Crushing

Aerospace ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 279
Author(s):  
Rongchao Jiang ◽  
Zongyang Gu ◽  
Tao Zhang ◽  
Dawei Liu ◽  
Haixia Sun ◽  
...  
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Circular Tube ◽  
Finite Element Models ◽  
Axial Crushing ◽  
Circular Tubes ◽  
Absorption Performance ◽  
Thin Walled ◽  
Entropy Weighted ◽  
Absorption Characteristics

Thin-walled tubes have gained wide applications in aerospace, automobile and other engineering fields due to their excellent energy absorption and lightweight properties. In this study, a novel method of entropy-weighted TOPSIS was adopted to study the energy absorption characteristics of a thin-walled circular tube under axial crushing. Three types of thin-walled circular tubes, namely, aluminum (Al) tubes, carbon-fiber-reinforced plastics (CFRP) tubes and CFRP-Al hybrid thin-walled tubes, were fabricated. Quasi-static axial crushing tests were then carried out for these specimens, and their failure modes and energy absorption performance were analyzed. The CFRP material parameters were obtained through tensile, compression and in-plane shear tests of CFRP laminates. The finite element models for the quasi-static axial crushing of these three types of circular tubes were established. The accuracy of the finite element models was verified by comparing the simulation results with the test results. On this basis, the effects of the geometric dimension and ply parameters of a CFRP-Al hybrid thin-walled circular tube on the axial crushing energy absorption characteristics were studied based on an orthogonal design and entropy-weighted TOPSIS method. The results showed that Al tube thickness, CFRP ply thickness and orientation have great effect on the energy absorption performance of a CFRP-Al hybrid thin-walled circular tube, whereas the tube diameter and length have little effect. The energy absorption capability of a CFRP-Al hybrid tube can be improved by increasing the thickness of the Al tube and the CFRP tube as well as the number of ±45° plies.

Energy-Absorbing Characteristics of the Stiffened Thin-Walled Tubes Subjected to Axial Crushing

2013 ◽  
Vol 437 ◽  
pp. 158-163
Author(s):  
Wei Liang Dai ◽  
Xu Guang Li ◽  
Qing Chun Wang
Keyword(s):  
Energy Absorption ◽  
Specific Energy ◽  
Absorption Capacity ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Specific Energy Absorption ◽  
Axial Crushing ◽  
The Mean ◽  
Thin Walled ◽  
Energy Absorbing

Energy absorbing characteristics of the non-stiffened and stiffened single hat sections subjected to quasi-static axial crushing were experimentally investigated. First non-stiffened hat sections were axially crushed, then structures with different stiffened methods (stiffened in hat and stiffened in the plate) were tested, finally energy absorption capacities of these structures were compared. Test results showed that, for the appropriate designed stiffened tube, the mean crush force and mass specific energy absorption were increased significantly compared to the non-stiffened. Stiffened in hat section showed a little more energy absorption capacity than that stiffened in the plate, but the structure may sustain a global bending.

scholarly journals Proactive regulation of axial crushing behavior of thin-walled circular tube by gradient grooves

2016 ◽  
Vol 108-109 ◽  
pp. 49-60 ◽  
Author(s):  
Yanpeng Wei ◽  
Zhe Yang ◽  
He Yan ◽  
Yacong Guo ◽  
Xianqian Wu ◽  
...  
Keyword(s):  
Circular Tube ◽  
Axial Crushing ◽  
Thin Walled ◽  
Crushing Behavior

Axial Crushing of Thin-Walled Tubes With Kite-Shape Pattern

2015 ◽  
Author(s):  
Degao Hou ◽  
Yan Chen ◽  
Jiayao Ma ◽  
Zhong You
Keyword(s):  
Energy Absorption ◽  
Peak Force ◽  
Great Promise ◽  
Axial Crushing ◽  
Crushing Force ◽  
Collapse Mode ◽  
Shape Pattern ◽  
The Mean ◽  
Thin Walled ◽  
Initial Peak

Thin-walled tubes are widely used as energy absorption devices in automobiles, designed to protect the costly structures and people inside during an impact event through plastic deformation. They show excellent performance under axial loading in terms of weight efficiency, stroke distance and total energy absorption, but also have the disadvantage that the crushing force is not uniform during deformation process, especially with the existence of a high initial peak force. Recently, pattern design on tubular structures has received increasing attention. It has been found that, if the surface of a tube is pre-folded according to an origami pattern, the collapse mode of the tube can be altered, leading to changes in energy absorption performance. In this paper, we present a series of origami patterned tubes with a kite-shape pattern that is constructed by joining two pieces of Miura-ori. First of all, the geometry of the pattern is presented. We develop a theoretical model to predict the energy absorption associated with the axial crushing of the patterned tubes and derive a mathematical formula to calculate the mean crushing force accordingly. Secondly, a family of origami tubes with various profiles are designed, and their performances subjected to quasi-static axial crushing are numerically investigated. A parametric study is also conducted to establish the relationship between the pre-folded angle of the pattern and the initial peak force as well as the mean crushing force. Numerical results show that introducing patterns to thin-walled tubes offers three advantages in comparison with conventional tubes, i.e., a lower initial peak force, a more uniform crushing load, and a stable and repeatable collapse mode. A 36.0% increase in specific energy absorption and 67.2% reduction in initial peak force is achieved in the optimum case. The new origami patterned tubes show great promise as energy absorption devices.

Experimental researches on failure and energy absorption of composite laminated thin-walled structures

2020 ◽  
Vol 54 (27) ◽  
pp. 4253-4268
Author(s):  
Mou Haolei ◽  
Xie Jiang ◽  
Zou Jun ◽  
Feng Zhenyu
Keyword(s):  
Energy Absorption ◽  
Failure Mode ◽  
Specific Energy ◽  
Failure Modes ◽  
Circular Tube ◽  
Failure Mechanisms ◽  
Specific Energy Absorption ◽  
Thin Walled Structures ◽  
Crushing Force ◽  
Thin Walled

To research the failure of carbon fiber-reinforced composite laminated specimens, the tensile tests and compressive tests were conducted for [90]16 and [0]16 specimens, and the shear tests were conducted for [±45]4s specimens, and the microscopic failure mechanisms were observed by scanning electron microscopy. To research the failure and energy absorption of different thin-walled structures with different layups, the quasi-static axial crushing tests were conducted for [±45/0/0/90/0]s and [0/90]3s circular tubes, [0/90]3s and [±45]3s square tubes, [0/90]4s and [±45]4s sinusoidal specimens, and the internal failure were further investigated by 3D X-ray scan. Based on the load-displacement curves, the energy absorptions were evaluated and compared according to specific energy absorption and peak crushing force, and the relationships between failure modes and specific energy absorption, peak crushing force were further researched. The results show that the macroscopic failure modes are the collective results of varieties of microscopic failure mechanisms, such as fiber fracture, matrix deformation and cracking, interlamination and intralamination cracks, cracks propagation, etc. The [±45/0/0/90/0]s circular tube shows the transverse shearing failure mode with high specific energy absorption. The [±45]3s square tube and [±45]3s sinusoidal specimen show the local buckling failure mode with low specific energy absorption. The [0/90]4s sinusoidal specimen, [0/90]3s circular tube, and [0/90]3s square tube show the lamina bending failure mode with medium specific energy absorption. The failure mode of thin-walled structure can be changed by reasonable layups design, and the energy absorption can further be improved.

scholarly journals Axial Crushing Behavior of Aluminum Square Tube with Origami Pattern

2016 ◽  
Vol 10 (2) ◽  
pp. 90 ◽  
Author(s):  
Prescilla Christy Albert ◽  
Amir Radzi Ab Ghani ◽  
Mohd Zaid Othman ◽  
Ahmad Mujahid Ahmad Zaidi
Keyword(s):  
Numerical Simulation ◽  
Energy Absorption ◽  
Testing Machine ◽  
Axial Crushing ◽  
Geometrical Shapes ◽  
Thin Walled Tube ◽  
Absorption Performance ◽  
Thin Walled ◽  
Crushing Behavior ◽  
Aluminum Alloy 6063

<span style="font-size: 10pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">The study of axial crushing behavior is important in designing crashworthy structures especially in automotive applications. The axial crushing of thin-walled tube has better energy absorption capability. Thus, introducing milled geometrical shapes on thin-walled tube may improve the energy absorption performance. The improvement of the crush response is determined through the reduction of the Initial Peak Force (IPF) and the increase of the Specific Energy Absorption (SEA). This was done by employing origami pattern milled on the surface of thin-walled square tube which was investigated experimentally and numerically. The material used for the tube was aluminum alloy 6063-T5. The simulation results were validated by experiments which were conducted using <span style="text-transform: uppercase;">Instron</span> 3382 Universal Testing Machine and <span style="text-transform: uppercase;">Instron Dynatup</span> 8250 Drop Hammer Machine. The numerical simulation then progressed by varying parameters such as dimensions and configurations of the origami pattern on the square tube. ABAQUS finite element (FE) software was used to conduct the numerical simulation. The result of employing the origami square pattern on square tube is expected to improve the crush response by lowering the IPF and increasing the SEA. The obtained results were then compared with the conventional square tube where the origami pattern on square tube enhanced the crush performance.</span>

scholarly journals Analysis of Energy Absorption Abilities of Thin-Walled Tubes by Impact Axial Crushing.

1997 ◽  
Vol 63 (605) ◽  
pp. 146-151
Author(s):  
Takahiro SOGO ◽  
Sadayuki UJIHASHI ◽  
Hiroyuki MATSUMOTO ◽  
Tadaharu ADACHI
Keyword(s):  
Energy Absorption ◽  
Axial Crushing ◽  
Thin Walled
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