Energy Absorption Characteristics on Aluminum Beams Strengthened with CFRP Laminates under Impact Loading

2005 ◽  
Vol 297-300 ◽  
pp. 1344-1349
Author(s):  
Seung Min Jang ◽  
Yuuki Kawai ◽  
Chiaki Sato
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Displacement Transducer ◽  
Cfrp Laminates ◽  
Three Point Bending ◽  
Reinforced Plastics ◽  
Side Door ◽  
Impact Tester ◽  
The Impact ◽  
Absorption Characteristics

In this paper, the energy absorption characteristics on extruded aluminum box-section strengthened with carbon-fiber-reinforced plastics (CFRP) laminates and/or foam material were investigated under impact loading. Impact tests using a pneumatic impact tester were conducted with the specimens in three-point bending flexure with consideration given to the side-door impact beams in vehicles. The absorbed energy to the specimen during the impact was determined from the loaddisplacement curve, which was obtained from the strain gauge attached to the impactor and the laser displacement transducer. From the results, it was found that the strengthening by externally bonding with CFRP laminates improved the impact-induced energy absorption. Also, the effect of the improvement was clearly seen in the case of the use of filling form material in the aluminum extrusion together with attaching CFRP laminates.

Simulation and Experimental Investigation of Impact Damage in Composite Shell

2005 ◽  
Vol 297-300 ◽  
pp. 1339-1343 ◽  
Author(s):  
Gui Ping Zhao ◽  
Chong Du Cho ◽  
Oh Yang Kwon
Keyword(s):  
Energy Absorption ◽  
Impact Damage ◽  
Displacement Transducer ◽  
Cfrp Laminates ◽  
Three Point Bending ◽  
Reinforced Plastics ◽  
Side Door ◽  
Impact Tester ◽  
Fiber Reinforced Plastics ◽  
The Impact

In this paper, the energy absorption characteristics on extruded aluminum box-section strengthened with carbon-fiber-reinforced plastics (CFRP) laminates and/or foam material were investigated under impact loading. Impact tests using a pneumatic impact tester were conducted with the specimens in three-point bending flexure with consideration given to the side-door impact beams in vehicles. The absorbed energy to the specimen during the impact was determined from the loaddisplacement curve, which was obtained from the strain gauge attached to the impactor and the laser displacement transducer. From the results, it was found that the strengthening by externally bonding with CFRP laminates improved the impact-induced energy absorption. Also, the effect of the improvement was clearly seen in the case of the use of filling form material in the aluminum extrusion together with attaching CFRP laminates.

The Effect of Geometry in End-of-Life Vehicle Recovery of Safety Beams

2014 ◽  
Vol 663 ◽  
pp. 614-621 ◽  
Author(s):  
A.A. Lashlem ◽  
D.A. Wahab ◽  
S. Abdullah ◽  
C.H. Che Haron
Keyword(s):  
End Of Life ◽  
Energy Absorption ◽  
Optimum Design ◽  
Motor Vehicle ◽  
Impact Load ◽  
Side Door ◽  
Successful Recovery ◽  
Automotive Parts ◽  
The Impact ◽  
Absorption Characteristics

Issues on the end-of-life recovery of automotive component parts are now gaining importance in the automotive industry. Incorporating the idea of recovery and reuse of component parts into the earlier stages of design and development is necessary to ensure the successful recovery of automotive parts and components. In this study, the optimum design of an automobile side door safety beam was proposed and analyzed using the finite element method. Different masses of impactor were used in the impact load simulations, namely, 10 kg, 20 kg, 30 kg, 40 kg, and 50 kg, at an impact speed of 50 km/h. The side door impact beam experimental setup was carried out in accordance with the requirement of the Federal Motor Vehicle Safety Standard intensity test. Numerical simulations were performed using the PAM CRASHTM software to determine an optimum design of the safety beam, with improvements in energy absorption, characteristics, and durability. Different types of impact become were proposed and analyzed for energy absorption characteristics. The results indicate that the energy absorption characteristics of the proposed W-beam are approximately 40% higher than that of the existing tube-beam, depicting that W-beam may stands a better chance energy attenuation.

Damage Development in CFRP Laminates under Impact Loading

2006 ◽  
Vol 326-328 ◽  
pp. 1833-1836 ◽  
Author(s):  
Seung Min Jang ◽  
Tadaharu Adachi ◽  
Akihiko Yamaji
Keyword(s):  
Impact Damage ◽  
Stacking Sequence ◽  
Absorbed Energy ◽  
Damage Development ◽  
Damage Resistance ◽  
Cfrp Laminates ◽  
Impact Tester ◽  
Weight Impact ◽  
The Impact ◽  
Delamination Area

The development characteristics of impact-induced damage in carbon-fiber-reinforcedplastics (CFRP) laminates were experimentally studied using a drop-weight impact tester. Five types of CFRP laminates were used to investigate the effect of stacking sequences and thicknesses. The efficiency of absorbed energy to impact energy was different for CFRP laminates with different stacking sequences or thicknesses. The DA/AE ratio of delamination area (DA) to absorbed energy (AE) was almost the same for CFRP laminates with the same stacking sequence regardless of the thickness. We found that the DA/AE ratio could be used as a parameter to characterize the impact damage resistance in CFRP laminates with different stacking sequences.

Experimental investigation of the quasi-static and impact tests on the energy absorption characteristics of coupler rubber buffers used in railway vehicles

2018 ◽  
Vol 233 (9) ◽  
pp. 937-950 ◽  
Author(s):  
Shuguang Yao ◽  
Zhixiang Li ◽  
Wen Ma ◽  
Ping Xu ◽  
Quanwei Che
Keyword(s):  
Energy Absorption ◽  
Impact Velocity ◽  
High Speed ◽  
Compression Tests ◽  
Static Compression ◽  
Static Tests ◽  
Impact Tests ◽  
High Speed Trains ◽  
The Impact ◽  
Absorption Characteristics

Coupler rubber buffers are widely used in high-speed trains, to dissipate the impact energy between vehicles. The rubber buffer consists of two groups of rubbers, which are pre-compressed and then installed into the frame body. This paper specifically focuses on the energy absorption characteristics of the rubber buffers. Firstly, quasi-static compression tests were carried out for one and three pairs of rubber sheets, and the relationship between the energy absorption responses, i.e. Eabn  =  n ×  Eab1, Edissn =  n ×  Ediss1, and Ean =  Ea1, was obtained. Next, a series of quasi-static tests were performed for one pair of rubber sheet to investigate the energy absorption performance with different compression ratios of the rubber buffers. Then, impact tests with five impact velocities were conducted, and the coupler knuckle was destroyed when the impact velocity was 10.807 km/h. The results of the impact tests showed that with the increase of the impact velocity, the Eab, Ediss, and Ea of the rear buffer increased significantly, but the three responses of the front buffer did not increase much. Finally, the results of the impact tests and quasi-static tests were contrastively analyzed, which showed that with the increase of the stroke, the values of Eab, Ediss, and Ea increased. However, the increasing rates of the impact tests were higher than that of the quasi-static tests. The maximum value of Ea was 68.76% in the impact tests, which was relatively a high value for the vehicle coupler buffer. The energy capacity of the rear buffer for dynamic loading was determined as 22.98 kJ.

Energy absorption characteristics of aluminium/CFRP hybrid beam under impact loading

2016 ◽  
Vol 22 (2) ◽  
pp. 190-201 ◽  
Author(s):  
Sang-Young Kim ◽  
Ju-Won Jeong ◽  
Jun-Yeob Kim ◽  
Hee-Chul Kim ◽  
Dong-Kil Shin ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Hybrid Beam ◽  
Absorption Characteristics

Dynamic Energy Absorption Performances of Rain Forest Vehicle (RFV) under Frontal Impact

2014 ◽  
Vol 67 (3) ◽  
Author(s):  
M. S. Othman ◽  
Z. Ahmad
Keyword(s):  
Energy Absorption ◽  
Impact Energy ◽  
Impact Loading ◽  
Rain Forest ◽  
Experimental Testing ◽  
Rigid Wall ◽  
Crash Analysis ◽  
Frontal Impact ◽  
Frontal Section ◽  
The Impact

This paper treats the crash analysis and energy absorption response of Rain Forest Vehicle (RFV) subjected to frontal impact scenario namely impacting rigid wall and column. Dynamic computer simulation techniques validated by experimental testing are used to carry out a crash analysis of such vehicle. The study aims at quantifying the energy absorption capability of frontal section of RFV under impact loading, for variations in the load transfer paths and geometry of the crashworthy components. It is evident that the proposed design of the RFV frontal section are desirable as primary impact energy mitigation due to its ability to withstand and absorb impact loads effectively. Furthermore, it is found that the impact energy transmitted to the survival room may feasibly be minimized in these two impact events. The primary outcome of this study is design recommendation for enhancing the level of safety of the off-road vehicle where impact loading is expected.   

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