Progressive collapse behaviour of aluminium-composite bitubular energy absorbers subjected to axial loading

2021 ◽  
Author(s):  
D. Maneiah ◽  
A. Praveen Kumar ◽  
M. Shunmugasundaram ◽  
Debasish Mishra ◽  
D. Sravani
Keyword(s):  
Progressive Collapse ◽  
Axial Loading ◽  
Aluminium Composite ◽  
Energy Absorbers

The Energy Absorption Behavior of Cruciforms Designed by Kirigami Approach

2018 ◽  
Vol 85 (12) ◽  
Author(s):  
Caihua Zhou ◽  
Shizhao Ming ◽  
Tong Li ◽  
Bo Wang ◽  
Mingfa Ren
Keyword(s):  
Numerical Simulations ◽  
Progressive Collapse ◽  
Offshore Structures ◽  
Peak Force ◽  
Geometric Imperfection ◽  
Single Plate ◽  
Energy Absorbers ◽  
Collapse Behavior ◽  
Parametric Analyses ◽  
Initial Peak

The cruciforms are widely employed as energy absorbers in ships and offshore structures, or basic components in sandwich panel and multicell structure. The kirigami approach is adopted in the design of cruciform in this paper for the following reasons. First, the manufacture process is simplified. Second, it can alter the stiffness distribution of a structure to trigger desirable progressive collapse modes (PCMs). Third, the kirigami pattern can be referred as a type of geometric imperfection to lower the initial peak force during impact. Experiments and numerical simulations were carried out to validate the effectiveness of kirigami approach for cruciform designs. Numerical simulations were carried out to perform comparative and parametric analyses. The comparative studies among single plate (SP), single plate with kirigami pattern (SPKP), and kirigami cruciform (KC) show that the normalized mean crushing force of KC is nearly two times higher than those of SP and SPKP, whereas the normalized initial peak force of KC reduces by about 20%. In addition, the parametric analyses suggest that both the parameters controlling the overall size (i.e., the global slenderness and local slenderness) and those related to the kirigami pattern (i.e., the length ratio and the relative position ratio) could significantly affect the collapse behavior of the cruciforms.

Impact Response of Thin-Walled Tubes: A Prospective Review

2012 ◽  
Vol 165 ◽  
pp. 130-134 ◽  
Author(s):  
Fauziah Mat ◽  
K. Azwan Ismail ◽  
S. Yaacob ◽  
O. Inayatullah
Keyword(s):  
Compressive Loading ◽  
Axial Loading ◽  
Geometrical Parameters ◽  
Axial Deformation ◽  
Thin Walled Structures ◽  
Structural Applications ◽  
Thin Walled ◽  
Energy Absorbers ◽  
Energy Absorbing ◽  
The Impact

Thin-walled structures have been widely used in various structural applications asimpact energy absorbing devices. During an impact situation, thin-walled tubesdemonstrate excellent capability in absorbing greater energy through plastic deformation. In this paper, a review of thin-walled tubes as collapsible energy absorbers is presented.As a mean of improving the impact energy absorption of thin-walled tubes, the influence of geometrical parameters such as length, diameter and wall thickness on the response of thin-walled tubes under compression axial loading are briefly discussed. Several design improvements proposed by previous researchers are also presented. The scope of this review is mainly focus on axial deformation under quasi-static and dynamic compressive loading. Other deformations, such as lateral indentation, inversion and splitting are considered beyond the scope of this paper. This review is intended to assist the future development of thin-walled tubes as efficient energy absorbing elements.

Crush Zone Morphology of Epoxy-Glass Fiber-Aluminium Composite Columnar Tube due to Longitudinal Crushing Force

2015 ◽  
Vol 1115 ◽  
pp. 258-261
Author(s):  
Perowansa Paruka ◽  
Mohd Hafizil Mat Yasin ◽  
Rizalman Mamat ◽  
Md Abdul Maleque ◽  
Md Kamal Md Shah
Keyword(s):  
Glass Fiber ◽  
Failure Modes ◽  
Axial Loading ◽  
Core Material ◽  
Aluminium Composite ◽  
Crushing Force ◽  
Type Fracture ◽  
Transverse Shearing ◽  
Final Mode ◽  
Crush Zone

Epoxy–glass fiber–aluminium composite may be of interest for energy absorption application due to their improved crashworthiness. In the current study, the hybrid–composite columnar tube specimen has been fabricated by a hand lay–up method using epoxy–glass fiber with aluminium columnar tube as a core material. An experimental quasi–static crush test has been performed on the specimen under axial loading. The post–crushing of composite lay–up configuration was observed during and after interaction of the axial loading with the specimen. The result of crush morphology analysis on final mode of failure of the specimen was carried out using SEM and showed combination of several failure modes such as matrix–fiber interfacial fracture, fiber breakage and hackles. However, the main failure mode is brittle type fracture comprising transverse shearing and splaying modes.

A Comparative Study of Obliquely Positioned Aluminium Alloy 6063 Tubes under Axial Loading

2016 ◽  
Vol 1133 ◽  
pp. 254-258
Author(s):  
Hafizan Hashim ◽  
Amir Radzi Ab Ghani ◽  
Hafizi Lukman ◽  
N.V. David
Keyword(s):  
Comparative Study ◽  
Critical Load ◽  
Peak Load ◽  
Axial Loading ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Oblique Position ◽  
Energy Absorbers ◽  
Load Angle ◽  
Initial Peak

A conventional tube is considered in oblique position when its longitudinal is oblique. However, oblique attachments vary as the tube can be a straight or angulated tube. In the present study, impact responses of different oblique positioned tubes subject to axial loading were numerically studied. Next, the best oblique arrangements were proposed that have higher critical load angle and energy absorption capacity. Results show that specimen of Top-Bottom Angulated (TBA) from horizontal is the best choice for its lowest initial peak load and mean crush load. This data therefore has great potential for further enhance the new design of energy absorbers in oblique position.

Performance Properties of Hybrid Aluminium–Composite Columnar Tube under Axial Crush Force

2015 ◽  
Vol 1115 ◽  
pp. 288-291
Author(s):  
Perowansa Paruka ◽  
Mohd Hafizil Mat Yasin ◽  
Rizalman Mamat ◽  
Md Abdul Maleque ◽  
Md Kamal Md Shah
Keyword(s):  
Energy Absorption ◽  
Hybrid Composite ◽  
Axial Loading ◽  
Absorption Capacity ◽  
Aluminium Composite ◽  
Absorption Properties ◽  
Energy Absorption Capacity ◽  
Fiber Mats ◽  
Axial Crush ◽  
Initial Peak

This paper presents an experimental work on the influence of number of layers in the overwrap hybrid composite columnars under repeated axial crush force. The columnar test specimens were fabricated by hand lay–up process using commercial available of 0/90° ply oriented epoxy-glass fiber mats. In determining the energy absorption capacity, three different columnar tubes were prepared using one-layer, two-layers and three-layers in order to determine the utilize of such fibers in structural automotive applications. Quasi-static crush test for these tubes was carried out using Instron machine with axial loading. Results showed that the axial crush force and the numbers of layers influenced the level of energy absorption before structures collapse. It is found that the initial peak crush force, mean crush force, crush force efficiency and energy absorption properties of the collapsed hybrid composite columnars were increased by adding of layers in the overwrap thickness.

Investigation of Energy Absorption Behaviour of Square Aluminium Tubes with Cutouts under Axial Compression

2019 ◽  
Vol 969 ◽  
pp. 181-186
Author(s):  
L. Prince Jeya Lal ◽  
G. Yuvaraj ◽  
S. Ramesh
Keyword(s):  
Energy Absorption ◽  
Axial Compression ◽  
Progressive Collapse ◽  
Research Work ◽  
Peak Load ◽  
Compressive Force ◽  
Triggering Mechanisms ◽  
Energy Absorbers ◽  
Energy Absorbing ◽  
Passenger Cabin

Energy absorbers in the form of hollow profiles are used in automobiles to mitigate energy transfer to passenger cabin during a crash event. A similar event is carried out in this research work to study the progressive compression behaviour of aluminium tubes with triggering mechanisms in the form of cut-outs. Various hollow profiles are used as energy absorbing elements. In this work, square aluminium tubes of 50x50 mm side and 150 mm length with wall thickness of 1.5 mm with cut-outs are tested under axial compression loading and the results are compared with tubes without any cutouts. Crash parameters like minimum compressive force required to fail the aluminium tube, energy absorption, peak load and progressive collapse behaviour are studied. Results reveal that tubes with slots exhibited better crash parameters than plain tubes and tubes with circular cutouts.

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