Prediction of Energy Absorption of Al-Based FGM Crash Box under Quasi-Static and Dynamic Loading

2014 ◽  
Vol 660 ◽  
pp. 557-561 ◽  
Author(s):  
Mohamad Rusydi Zainal Abidin ◽  
Saifulnizan Jamian ◽  
Nik Hisyamudin Muhd Nor
Keyword(s):  
Heat Treatment ◽  
Energy Absorption ◽  
Dynamic Loading ◽  
Treatment Method ◽  
Functionally Graded ◽  
Maximum Force ◽  
Loading Test ◽  
Graded Materials ◽  
Static Loading Test ◽  
Static And Dynamic Loading

In this study, simulations of quasi-static and dynamic loading on the Al functionally graded materials (Al FGM) crash boxes are carried out. The FGM crash box is fabricated by heat treatment method. Five different crash boxes, namely FGM0, FGM1, FGM2, FGM3 and FGM4 for the different heat treatment temperatures of 25, 500, 520, 540 and 560 °C, respectively are investigated. The simulation results of quasi-static loading test show that FGM1 has the maximum force of 97.515 kN and the highest specific energy absorption (SEA), 33.029 kJ/kg. As for dynamic loading test, FGM3 has recorded the highest maximum force, 59.379 kN and FGM2 has recorded the highest SEA, 24.17 kJ/kg. It can be concluded that the strength and SEA of crash box is increased by introducing FGM concept.

scholarly journals Crashworthiness Behavior of Hollow Al-Based Functionally Graded Material (FGM) Box under Quasi-Static Loading

2015 ◽  
Vol 773-774 ◽  
pp. 110-114 ◽  
Author(s):  
Saifulnizan Jamian ◽  
Mohamad Rusydi Zainal Abidin ◽  
Azli Mahfuz Muda
Keyword(s):  
Energy Absorption ◽  
Functionally Graded Material ◽  
Static Loading ◽  
Trigger Points ◽  
Functionally Graded ◽  
Deformation Pattern ◽  
Loading Test ◽  
Severity Of Injury ◽  
Static Loading Test ◽  
Graded Material

This study aims to investigate the crashworthiness behavior of hollow Al-based functionally graded material (FGM) box. In order to introduce the concept of FGM, several holes are known as trigger points were drilled on a thin-walled Al column. The column was divided into four segments and each segment has a different number of trigger points. The difference number of trigger points on each segment produces the different structural strength. Quasi-static loading test was conducted in order to observe the deformation pattern occurred. The corresponding graph of force versus distance then was analyzed to obtain the value of energy absorption for each sample. Five samples of different segment arrangement were tested, namely, S1a, S1b, S2, S3 and S4. From the results obtained, the sample S1b give the best results with the highest value of energy absorption. This sample is designed with a large number of trigger points in the first segment, followed by a reduced number of trigger points until the end of the segment. The quality of crash box can be improved by introducing FGM concept. This type of crash box is able to produce a grade of absorption crushing energy. Thus it can reduce severity of injury during an accident.

scholarly journals Experimental and analytical assessment of 60 m steel truss bridge

2019 ◽  
Vol 276 ◽  
pp. 01030
Author(s):  
Harun Alrasyid ◽  
Afif Navir Revani ◽  
Mudji Irmawan ◽  
Munarus Suluch ◽  
Yusronia E Putri
Keyword(s):  
Experimental Test ◽  
Static Loading ◽  
Experimental Result ◽  
Actual Condition ◽  
Loading Test ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
Static Loading Test ◽  
Truss Bridge ◽  
Static And Dynamic Loading

The experimental test was conducted on a new 60 m Steel Truss Bridge at Lumajang East Java. The Purpose of the test to observe the actual condition of the bridge before use for regular traffic. The static and dynamic loading test were applied. For static loading 63% of live load was applied. Several test instruments were installed to record all data during testing. Seven stages of loading were performed during static loading test. The structural analysis also performed as comparison with the experimental result. The experimental test and analytical study showed that the Steel Truss Bridge provides good performance refers to current Indonesian code.

Energy Absorption Characteristics of Dual Phase Steel Tubes Under Static and Dynamic Loading

Strain ◽  
2009 ◽  
Vol 47 ◽  
pp. e387-e401 ◽  
Author(s):  
R. Velmurugan ◽  
R. Muralikannan ◽  
S. K. Malhotra ◽  
V. Sudharsan
Keyword(s):  
Energy Absorption ◽  
Dynamic Loading ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Steel Tubes ◽  
Static And Dynamic Loading ◽  
Absorption Characteristics

Nondestructive Testing and Static/Dynamic Loading Detection of a Diseased Fabricated Hollow Slab Bridge

2013 ◽  
Vol 351-352 ◽  
pp. 1163-1167 ◽  
Author(s):  
Xiao Ke Li ◽  
Zhi Hao Wang ◽  
Zhu Lin Yang ◽  
Shun Bo Zhao
Keyword(s):  
Nondestructive Testing ◽  
Dynamic Loading ◽  
Prestressed Concrete ◽  
Concrete Strength ◽  
Loading Test ◽  
Engineering Structures ◽  
Current Design ◽  
Static Loading Test ◽  
Nondestructive Testing Methods ◽  
Strength And Durability

Combined with a repaired project, an old twin decks bridge by simply supported the fabricated prestressed concrete hollow slabs with 16m span was detected in-site. The two decks were built separately in 1987 and 1997 because of economic reasons and demands of traffic flow. The aim of test was to decide whether the bridge can be further used or should be strengthened to meet the demands according to the current design code. Firstly, the damaged and corroded situations of whole bridge were investigated. Then the nondestructive testing methods were adopted to detect the concrete strength and carbonation depth of slabs and piers. The static loading test was conducted to make sure the service behaviors such as crack and mid-span deflection of the whole bridge. Finally, whole bridge was detected by dynamic loading test. The results show that the bridge has enough flexural stiffness to prevent larger deflection and most of slabs are in good service performance. But attacked by the environmental factor such as acid rain, CO2 and winds erosion etc., part of slabs, all railings and sidewalk flats should be replaced. Based on service conditions, the suggestions are given to recover the strength and durability of the bridge. The conclusions would serve as a reference for similar engineering structures.

Nondestructive Testing and Static/Dynamic Loading Detection of Old Slab for Bridge Widening

2011 ◽  
Vol 101-102 ◽  
pp. 662-665 ◽  
Author(s):  
Shun Bo Zhao ◽  
Ji Hao Chen ◽  
Xiong Huai Yu ◽  
Cheng Chen ◽  
Song Chen
Keyword(s):  
Nondestructive Testing ◽  
Dynamic Loading ◽  
Prestressed Concrete ◽  
Concrete Cover ◽  
Design Code ◽  
Loading Test ◽  
Load Combination ◽  
Maximum Test ◽  
Current Design ◽  
Static Loading Test

Combined with a freeway widening project, an old bridge composed by simply supported prestressed concrete hollow slabs in 20m span was detected in-site for deciding whether it can be further used, which was designed according to the former design code. The maximum test load was calculated under the worst load combination at service stage according to the current design code. The inspection of the bridge was conducted by nondestructive testing methods for strength and carbonation of concrete, concrete cover and corrosion of prestressed strands. The service behaviors such as crack and mid-span deflection of a slab were measured by static loading test. The entirety of the bridge was detected by dynamic loading test. The results show that the strength of concrete and the concrete cover of prestressed strands meet with the design requirement, the carbonation of concrete and corrosion of prestressed strands is insignificant, the bridge is in good service performance, and the slab has enough flexural stiffness to prevent larger deflection.

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