The Effect of Discontinuities on the Fatigue Behavior of Transverse Butt Welds in Steel PDF Download
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Author: Mark Douglas Bowman
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 254
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Book Description
Author: Mark Douglas Bowman
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 254
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Book Description
Author: Mark Douglas Bowman
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 0
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572
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Book Description
Author: William Herman Munse
Publisher:
ISBN:
Category : Steel, Structural
Languages : en
Pages : 224
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Book Description
Author: United States. Ship Structure Committee
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 230
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Book Description
Author: A. J. Hartmann
Publisher:
ISBN:
Category : Strength of materials
Languages : en
Pages : 50
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Book Description
Author: Thomas A. Cruse
Publisher: ASTM International
ISBN: 0803109725
Category : Fracture mechanics
Languages : en
Pages : 936
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
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Book Description
The results of axial fatigue tests of transverse butt welded joints in HY-80 steel containing internal defects are reported. The tests were conducted on 3/4 in. and 1-1/2 in. thick material under stress cycles of zero- to-tension and complete reversal. The types of weld defects studied include porosity, slag inclusions, and artificially produced pores, and show that the existence of weld defects measurably decreases the fatigue life of a joint at a given stress cycle when compared to sound welded specimens (with reinforcement removed). However, there does not appear to be a simple correlation between type of defect or amount of defective area and fatigue strength. As part of the study of weld defects, radiographic and ultrasonic techniques were employed to determine the time to initiation and propagation of fatigue cracks in welded joints. The subsequent crack propagation progresses slowly and erratically at first, but the rate of growth is rapidly accelerated from the time it reaches the specimen surface until complete failure occurs. Metallurgical studies were conducted to examine the effect of restraint during welding on the formation of internal microcracks (sulfide inclusions) in welded joints, and the behavior of these joints under conditions of fatigue.
Author: William Herman Munse
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 232
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Book Description
Author: TW. Crooker
Publisher:
ISBN:
Category : Discontinuities
Languages : en
Pages : 25
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Book Description
Fabrication discontinuities in weldments pose a serious engineering problem for structural applications involving cyclic loading. Often, the discovery of fabrication discontinuities through nondestructive inspection can pose a dilemma: if not repaired, failure can result from crack initiation and growth; however, if improperly repaired, post-repair discontinuities of even greater severity may result. Thus, rational decision-making criteria are needed to assess the mechanical severity of actual fabrication defects in weldments. This study was undertaken to explore the applicability of linear elastic fracture mechanics to characterize the fatigue behavior of high-strength steel weldments containing lack-of-penetration (LOP) and slag/lack-of-fusion (S/LOF) discontinuities. Full penetration, double-V butt welds with reinforcements removed were tested under zero-to-tension axial loading. Various filler metals and welding techniques were used. Both sound welds and welds containing discontinuities were cycled to failure. Whenever possible, cycles to crack initiation were estimated by strain gage measurements. The fracture mechanics approach was successful in correlating the fatigue lifetimes of specimens containing single LOP discontinuities of varying size. However, the fatigue behavior of specimens containing multiple S/LOF discontinuities proved to be much more complex and difficult to analyze.
