Effect of tailored plies on the energy absorption capability of square CFRP tubes with discontinuous fibers

2019 ◽  
Vol 209 ◽  
pp. 150-159 ◽  
Author(s):  
Zhibo Xin ◽  
Yugang Duan ◽  
Jin Zhou ◽  
Hong Xiao
Keyword(s):  
Energy Absorption ◽  
Cfrp Tubes

Dynamic Axial Compression of Square CFRP/Aluminium Tubes

2019 ◽  
Vol 794 ◽  
pp. 202-207
Author(s):  
Rafea Dakhil Hussein ◽  
Dong Ruan ◽  
Guo Xing Lu ◽  
Jeong Whan Yoon ◽  
Zhan Yuan Gao
Keyword(s):  
Energy Absorption ◽  
Specific Energy ◽  
Fibre Composite ◽  
Dynamic Tests ◽  
Carbon Fibre Composite ◽  
Specific Energy Absorption ◽  
Static Tests ◽  
Crushing Force ◽  
Cfrp Tubes ◽  
The Impact

Carbon fibre composite tubes have high strength to weight ratios and outstanding performance under axial crushing. In this paper, square CFRP tubes and aluminium sheet-wrapped CFRP tubes were impacted by a drop mass to investigate the effect of loading velocity on the energy absorption of CFRP/aluminium tubes. A comparison of the quasi-static and dynamic crushing behaviours of tubes was made in terms of deformation mode, peak crushing force, mean crushing force, energy absorption and specific energy absorption. The influence of the number of aluminium layers that wrapped square CFRP tubes on the crushing performance of tubes under axial impact was also examined. Experimental results manifested similar deformation modes of tubes in both quasi-static and dynamic tests. The dynamic peak crushing force was higher than the quasi-static counterpart, while mean crushing force, energy absorption and specific energy absorption were lower in dynamic tests than those in quasi-static tests. The mean crushing force and energy absorption decreased with the crushing velocity and increased with the number of aluminium layers. The impact stroke (when the force starts to drop) decreased with the number of aluminium layers.

Improving the energy absorption capacity of square CFRP tubes with cutout by introducing chamfer

2021 ◽  
Vol 189 ◽  
pp. 105994
Author(s):  
Zhibo Song ◽  
Shizhao Ming ◽  
Tong Li ◽  
Kaifan Du ◽  
Caihua Zhou ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Cfrp Tubes

Cutting Deformation Mechanisms of Square Aluminium/CFRP Tubes

2017 ◽  
Vol 744 ◽  
pp. 317-321 ◽  
Author(s):  
Rafea Dakhil Hussein ◽  
Dong Ruan ◽  
Guo Xing Lu ◽  
Akshay Kumar
Keyword(s):  
Energy Absorption ◽  
Deformation Mode ◽  
Deformation Mechanisms ◽  
Specific Energy Absorption ◽  
Crushing Force ◽  
New Energy ◽  
Cutting Deformation ◽  
Cfrp Tubes ◽  
Trigger Mechanisms ◽  
Initial Peak

The aim of this study is to find the best platen with blades as a new energy dissipating mechanism that causes considerably damage to CFRP/aluminium tubes. Specially designed and manufactured platens with five different cutting blade profiles were used to simultaneously cut and crush square CFRP tubes and aluminium sheet-wrapped CFRP tubes. The platens with blades were evaluated in terms of the deformation mode, mean crushing force, energy absorption and specific energy absorption of tubes. Experimental results showed that tubes cut and crushed by the platen with 45o inclined blades had the best crushing performance and exhibited a more stable deformation mode compared with those for tubes cut and crushed by other platens with different blade profiles. The platens with blades acted as trigger mechanisms that minimise the initial peak crushing force and maximise the energy absorption of tubes compared with tubes crushed by flat loading platens.

Crushing responses and energy absorption behaviors of multi-cell CFRP tubes

2020 ◽  
Vol 155 ◽  
pp. 106930 ◽  
Author(s):  
Qiang Liu ◽  
Jie Fu ◽  
Yitao Ma ◽  
Yanqin Zhang ◽  
Qing Li
Keyword(s):  
Energy Absorption ◽  
Cfrp Tubes

Comparative Research on the Crushing Behaviour of Aluminium Sheet Wrapped Square Carbon Fibre Reinforced Plastic (CFRP) Tubes

2016 ◽  
Vol 725 ◽  
pp. 82-87 ◽  
Author(s):  
Rafea Dakhil Hussein ◽  
Dong Ruan ◽  
Guo Xing Lu
Keyword(s):  
Carbon Fibre ◽  
Energy Absorption ◽  
Specific Energy ◽  
Deformation Mode ◽  
Specific Energy Absorption ◽  
Aluminium Sheet ◽  
Reinforced Plastic ◽  
Crushing Force ◽  
Carbon Fibre Reinforced Plastic ◽  
Cfrp Tubes

In this study, hollow square carbon fibre reinforced plastic (CFRP) tubes and aluminium sheet wrapped CFRP tubes have been axially crushed at a quasi-static loading velocity of 0.05 mm/s. A specially designed and manufactured platen with four cutting blades was used to cut and crush these two tubular structures. The four cutting blades had height of 5 mm and width of 3 mm with round tip to reduce the initial peak force and achieve a stable crushing deformation mode. Notches at one end of each tube were utilized to control the location of initial failure. The crashworthiness characteristics of hollow CFRP tubes and aluminium sheet wrapped CFRP tubes with notches that crushed by the platen with cutting blades were compared with those of tubes that crushed by a flat platen. Experimental results showed that using the platen with blades to crush the specimens with notches exhibited more stable deformation mode than the specimens without notches. Mean crushing force, energy absorption and specific energy absorption (SEA) increased when CFRP was wrapped with aluminium sheet and crushed by the platen with blades. The increase of average value of mean crushing force, energy absorption and specific energy absorption of aluminium sheet wrapped CFRP tube and crushed by the platen with blades are 16.5%, 17.3% and 5% respectively more than those for hollow tubes that crushed by a flat platen.

The Indentation Behaviour of Carbon Fibre Composite Tubes-Experiments & Modelling

2010 ◽  
Vol 654-656 ◽  
pp. 2616-2619
Author(s):  
Ranjani Sudharsan ◽  
Bernard F. Rolfe ◽  
Peter D. Hodgson
Keyword(s):  
Finite Element ◽  
Carbon Fibre ◽  
Energy Absorption ◽  
Side Impact ◽  
Cyclic Shear ◽  
Finite Element Software ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Cfrp Tubes ◽  
Crash Behaviour

Metallic tubes have been extensively studied for their crashworthiness as they closely resemble automotive crash rails. Recently, the demand to produce lighter weight, yet safer vehicles has led to the need to understand the crash behaviour of novel materials, such as fibre reinforced polymer composites, metallic foams and sandwich structures. This paper discusses the static indentation response of Carbon Fibre Reinforced Polymer (CFRP) tubes. The side impact on a CFRP tube involves various failure mechanisms. This paper highlights these mechanisms and compares the energy absorption of CFRP tubes with similar Aluminium tubes. The response of the CFRP tubes during bending was modelled using ABAQUS finite element software with a composite fabric material model. The material inputs were given based on standard tension and compression test results and the in-plane damage was defined based on cyclic shear tests. The failure modes and energy absorption observed during the tests were well represented by the finite element model.

scholarly journals Post Tensioned CFRP tubes for improved energy absorption

2021 ◽  
Author(s):  
Venkateswarlu Gattineni ◽  
◽  
Venukumar Nathi ◽  
Keyword(s):  
Energy Absorption ◽  
Impact Energy ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Element Analysis ◽  
Simulation Techniques ◽  
Thin Tube ◽  
Post Tensioning ◽  
Cfrp Tubes ◽  
Post Tensioned

Thin-walled tubes made of CFRP (Carbon fiber reinforced Polymer) are being increasingly used as CC (Crush Cans) due to their higher specific energy absorption capacity in the automotive domain for absorbing impact energy during a frontal crash. Finite element analysis (FEA) based computational methods have matured over the years with increased accuracy and acceptable correlation with experimental results. FEA-based computational studies when used appropriately can reduce the number of physical tests and prototypes required besides accelerating the overall cycle design time. The present work proposes an FEA based design validation approach for the evaluation of post-tensioned crush can design that can absorb more impact energy compared to a normal CFRP thin tube. The FEM based method uses a combination of multiple simulation techniques to predict the behavior of a post-tensioned tube. The post-tensioning in the present work has been proposed in the form of internal pressure for the thin tube. It was found that a safe value of pressure, when applied as a post-tensioning load, can improve the energy absorption capacity without increasing the weight of the tube.

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