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Keywords: cracks
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2010
ISBN: 978-0-8031-7510-5
... with the standing contact fatigue testing. surface induction hardening case depth static capacity slewing bearings plastic indentation core crush cracks defect tolerance Reprinted from JAI, Vol. 6, No. 10 doi:10.1520/JAI102630 Available online at www.astm.org/JAI Junbiao Lai,1 Pascal Ovize,2 Hans...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3479-7
ISBN: 978-0-8031-3479-9
... The present paper is concerned with the application of a plasticity-induced crack-closure model, FASTRAN, to predict fatigue-crack growth under various load histories in a thin-sheet Ti-62222 STA titanium alloy. This alloy was a leading candidate for a metallic High-Speed-Civil-Transport (HSCT...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2888-6
ISBN: 978-0-8031-2888-0
... The objective of this paper was to investigate the fracture behavior of compact and middle-crack tension specimens made of 6.35 mm thick 2024-T351 aluminum alloy. Tests were conducted on compact tension, C(T), specimens ranging in width from 51 to 152 mm and on middle-crack tension, M(T...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2852-5
ISBN: 978-0-8031-2852-1
... weldability of heavily neutron-damaged materials for establishing criteria for the repair welding process. The objective of this research is to clarify the mechanisms of weld cracking, especially for heat affected zone cracking in heavily neutron irradiated stainless steels. stainless steel weld heat...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2624-7
ISBN: 978-0-8031-2624-4
... A plasticity-induced crack-closure model was used to study fatigue crack growth and closure in a thin-sheet 2024-T3 aluminum alloy under threshold and constant-K max testing procedures. Two methods of calculating crack-opening stresses were compared: one based on contact-K analyses...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2863-0
ISBN: 978-0-8031-2863-7
... Fasteners are widely used in aerospace and other industrial applications. Structural integrity analysis of such components is a critical necessity in many of the applications. The present paper describes some recently obtained stress intensity factor solutions for cracked threaded members...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2863-0
ISBN: 978-0-8031-2863-7
... The application of fracture mechanics to mechanical fasteners requires stress-intensity-factor solutions for cracks at fastener holes and in threaded, round bars. This bibliography lists references that present stress-intensity-factor solutions for cracks at circular holes and a wide range...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2868-1
ISBN: 978-0-8031-2868-2
... This paper is written to honor Dr. George R. Irwin and reviews several key developments in fracture mechanics based on his “stress-intensity factor” concept. The early development of two fundamental crack solutions, (1) an edge crack in a semi-infinite body and (2) the surface crack...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2868-1
ISBN: 978-0-8031-2868-2
... Aging aircraft may develop multiple-site damage (MSD) that can reduce the structural integrity of fuselage structures. The existence of small cracks emanating from adjacent rivet holes in a fuselage lap-splice joint is of major concern. The residual strength of a panel with a lead crack...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2499-6
ISBN: 978-0-8031-2499-8
... pilgering should be avoided to prevent crack formation in the tubes. The results made possible the use of higher reduction (91%) in cold pilgering. Also, anappropriate heat treatment for the properties of the final tubes in the new process was investigated. It indicated that quenching the tubeshell...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2486-4
ISBN: 978-0-8031-2486-8
... The purpose of this paper was to verify the capability of the STAGS (general shell, geometric and material nonlinear) code and the critical crack-tip-opening angle (CTOA) fracture criterion to predict stable tearing in cracked panels that fail with severe out-of-plane buckling. Materials...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2486-4
ISBN: 978-0-8031-2486-8
... The purpose of this paper is to present results for fully plastic J -integrals for through-wall axial cracks in pressurized pipes. Results are presented for power law hardening material for crack lengths ranging from zero to semi-infinite. The small crack results are based on previously...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2611-5
ISBN: 978-0-8031-2611-4
... An assessment of the plasticity-induced crack closure concept is made, in light of some of the questions that have been raised on the validity of the concept, and the assumptions that have been made concerning crack-tip damage below the crack-opening stress. The impact of using other crack-tip...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2412-0
ISBN: 978-0-8031-2412-7
... different flow stresses in the crack closure model and correcting for plasticity, the experimental results were bounded by the predictions for high gross section stresses. Further analysis of the complex perforation geometry and the local material chemistry is needed to further understand the fatigue...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2412-0
ISBN: 978-0-8031-2412-7
... A boundary element method is presented for the stress analysis of cracks in two-dimensional, linearly elastic anisotropic solids. The technique is an extension of that by Chang and Mear [ 5 ] for isotropic solids and involves the use of a special “regularization” for certain integrals associated...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2413-9
ISBN: 978-0-8031-2413-4
... displacement was used as the in situ indicator of damage accumulation. The fracture surface and the damage zone around the main crack were characterized in the fractured specimens to investigate the high-temperature fracture mechanisms. Under constant displacement rate, the composite showed extensive nonlinear...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... This paper addresses the modeling of crack growth resistance of titanium-based metal matrix composites under cyclic loading by considering the conditions necessary to promote the crack arrest of dominant cracks that are often observed in these materials. The presence of dominant cracks...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... The growth rates of matrix fatigue cracks bridged by sliding fibers are now commonly predicted by models based on the micromechanics of frictional interfaces. However, there exist many reasons, both theoretical and experimental, for suspecting that the most popular micromechanical models...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-1882-1
ISBN: 978-0-8031-1882-9
... The stable tearing behavior of thin sheets of 2024-T3 aluminum alloy was investigated for middle crack tension, M(T), and compact tension, C(T), specimens. The surface crack-tip opening angle (CTOA), applied loads, crack extension, and local displacements were measured. A critical CTOA fracture...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-1882-1
ISBN: 978-0-8031-1882-9
... discontinuities, particularly at groove welds which intersected the longitudinal fillet welds without a cope hole. The 162 beams were fatigue tested in four-point bending in a test matrix which included various stress ranges and minimum stress levels. The discontinuities at the origin of each fatigue crack were...