scholarly journals Crack Growth Behavior through Wall Pipes under Impact Load and Hygrothremal Environment

2018 ◽  
Vol 14 (4) ◽  
pp. 9-15
Author(s):  
Ali Jamal Khaled ◽  
Ahmed Abdul Hussain
Keyword(s):  
Crack Growth ◽  
Impact Load ◽  
Low Carbon Steel ◽  
High Accuracy ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Bending Stress ◽  
Low Carbon ◽  
Number Of Cycles ◽  
The Impact

This research concerns study the crack growth in the wall of pipes made of low carbon steel under the impact load and using the effect of hygrothermal (rate of moisture 50% and 50℃ temperature). The environmental conditions were controlled using high accuracy digital control with sensors. The pipe have a crack already. The test was performed and on two type of specimens, one have length of 100cm and other have length 50cm. The results were, when the humidity was applied to the pipe, the crack would enhance to growth (i.e. the number of cycles needed to growth the crack will reduce). In addition, when the temperature was increase the number of cycles needed to growth the crack are reduced because the effect of heat on the mechanical properties of the material. In addition, when the test performed on the specimens of length 50cm the number of cycles needed to growth the crack is increase because the effect of bending stress on the pipes.

scholarly journals Crack Growth Behavior through Wall Pipes under Impact Loading And Moisten Environment

2018 ◽  
Vol 25 (1) ◽  
pp. 1-12
Author(s):  
Ali Jamal Khaled ◽  
Ahmed Abdul Hussain
Keyword(s):  
Crack Growth ◽  
Impact Load ◽  
Low Carbon Steel ◽  
High Accuracy ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Bending Stress ◽  
Low Carbon ◽  
Number Of Cycles ◽  
The Impact

This search concerns study the crack growth in the wall of pipes made of low carbon steel under the impact load and using the effect of moisture (rate of moisture 50%). The environmental conditions were controlled using high accuracy digital control with sensors. The pipe has a crack already. The test was performed and on two type of specimens, one has a length of 100cm and other have length 50cm. The results were, when the humidity was applied to the pipe, the crack would enhance to grow (i.e. the number of cycles needed to grow the crack will reduce). In addition, when the test performed on the specimens of length 50cm the number of cycles needed to grow the crack is increased due to the effect of bending stress on the pipes.  

Fatigue crack growth behavior in ultrafine grained low carbon steel

2002 ◽  
Vol 16 (10) ◽  
pp. 1246-1252 ◽  
Author(s):  
Ho-Kyung Kim ◽  
Myung-Il Choi ◽  
Chin-Sung Chung ◽  
Dong-Hyuk Shin
Keyword(s):  
Fatigue Crack ◽  
Carbon Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Low Carbon Steel ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
Low Carbon ◽  
Ultrafine Grained

Crack Growth Behavior in Overloaded Specimens with Sharp Notch in Low Carbon Steel

2007 ◽  
Vol 35 (5) ◽  
pp. 100097
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
Anindito Purnowidodo ◽  
Shingo Fukuzato ◽  
Akihide Saimoto ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Crack Growth ◽  
Low Carbon Steel ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Low Carbon ◽  
Sharp Notch

Effect of Hydrogen on Fatigue-Crack Growth of a Ferritic-Pearlitic Low Carbon Steel

2017 ◽  
Author(s):  
Akihide Nagao ◽  
Shuai Wang ◽  
Kelly E. Nygren ◽  
Mohsen Dadfarnia ◽  
Petros Sofronis ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Carbon Steel ◽  
Fatigue Crack Growth ◽  
Fracture Surface ◽  
Crack Growth ◽  
Low Carbon Steel ◽  
Dislocation Cell ◽  
Crack Growth Behavior ◽  
Low Carbon ◽  
And Shifts

The effect of external high-pressure H2 gas on fatigue-crack growth behavior has been examined using a ferritic-pearlitic low carbon steel. The presence of hydrogen accelerates the crack growth rate by ≈13 times compared to the uncharged state and shifts the fracture surface morphology from ductile striations to a mixture of “flat” and “quasi-cleavage” features. The common feature found in the microstructure immediately beneath the hydrogen-induced fracture surface is enhanced plasticity in terms of refined dislocation cell structures and dense dislocation bands.

Impact Performance of Low Carbon Steel Safety Beams for Car Doors

2012 ◽  
Vol 165 ◽  
pp. 247-251
Author(s):  
A.A. Lashlem ◽  
Dzuraidah Abd Wahab ◽  
Shahrum Abdullah ◽  
Che Hassan Che Haron
Keyword(s):  
Carbon Steel ◽  
Energy Absorption ◽  
Impact Load ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Element Analysis ◽  
Impact Performance ◽  
Beam Design ◽  
The Impact ◽  
Impact Absorption

This paper presents impact behaviour and energy absorption response of car door safety beams. Low carbon steel of thickness 2.25 mm, designed into four different shapes of, tube-beam, I-beam and II-beam were used in this experiment to study the effect of impact load on the crash characteristic of the door beams in terms of load bearing and attenuation of energy. The tube-beam is the conventional beam commonly used in cars today. The reason propelling the investigation of other beams is to draw a parallel comparison with the conventional tube beam and possibly obtain an optimised design in terms of impact absorption capability. Masses of impactors used in the impact load simulations were 10 kg, 20 kg, 30 kg, 40 kg and 50 kg at an impact speed of 30 km/h. Analysis were carried out on all samples focusing on energy absorption and deformation characteristics of the beam structures using Pam CrashTM finite element analysis software. Results from this studies indicated that the II-beam design is better than the other beams in terms of the energy absorption and deformation. The proposed II-beam design may be able to prolong the useful life of passenger car door.

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