1-20 of 155 Search Results for

crack geometry

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... field could be transferred from one body to another body, considerably easing the solution of problems. Results from simple laboratory geometries could be applied to manufactured components. As such, the fracture mechanics approach is an important part of stress analysis at the tips of sharp cracks...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001053
EISBN: 978-1-62708-214-3
...Abstract Abstract A carbon steel (ASTM A515 grade 70) pressure vessel failed by brittle fracture while being hydro tested in the fabricating shop. The fracture origin was a small crack at a welding arc strike associated with the toe of a nozzle weld. A fracture mechanics calculation indicated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047181
EISBN: 978-1-62708-233-4
... for the formation of the sulfide stringers observed. Apparently, the combination of the clustered, stringer-type inclusions and the quenching conditions were too severe for this component geometry. The result was a high incidence of quench cracks that rendered the parts useless. The steel should have...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... the requirements for ductile and brittle crack propagation are not very different, specimen geometry, imperfection geometry, loading rate, and temperature can cause different microscale events to occur that alter the macroscale appearance. This is especially true in the body-centered cubic (bcc) materials...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
... fracture by cleavage. The crack followed the heat-affected zone of a welded joint connecting a rectangular hollow section member and a plate flange. The main factors contributing to failure were related with a combination of design-in and manufacturing-in factors like high load-strength ratio at the point...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... Effects are Significant Step 3: Interpret the S-N Data Step 4: Calculate the Cumulative Damage and Apply a Scatter Factor Step 1: Develop the Stress Spectrum Step 2: Choose an Appropriate Crack Geometry and Obtain the Stress-Intensity Factor Solution Step 3: Obtain da/dN Data and Choose...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
.... On this basis, the critical crack size at the service stress level is greater than the wall thickness of the pipe, so that failure results in leaking rather than in catastrophic rupture. The shape of the crack during propagation depends on several factors, including fracture mechanisms, local geometry...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
... when the FAP falls on the FAC for Levels 1 and 2, BS 7910 ( Ref 7 ). Assume: (1) plane strain for Level 2, (2) the stress-strain curves for Level 2c are those shown in Fig. 6 , and (3) the crack geometry is that of through-crack of length 2 a in an infinitely wide plate of thickness a : (Eq 25...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... is the plane-strain fracture toughness dependent on temperature and environment, Y is the geometric factor dependent on loading and specimen and crack geometry, σ f is the stress at fracture, and a c is the critical crack size. In other words, brittle fracture is said to occur when the stress...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001766
EISBN: 978-1-62708-241-9
... stress intensity will increase by virtue of both crack extension and exposure of the crack tip to a rising far-field stress. A contour plot of FEA results combining the cracked geometry with the residual and applied stress profile is shown in Fig. 10 . This stress distribution will exacerbate any...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... of problems. Results from simple laboratory geometries could be applied to manufactured components. As such, the fracture mechanics approach is an important part of stress analysis at the tips of sharp cracks or discontinuities. This is briefly discussed in the section “Fracture Mechanics” in this article...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... of failure, a series of analyses were performed to quantify the effective stresses and stress intensities at failure. Three stress intensity solutions were used to model the fracture surfaces: semi-elliptical surface cracks at a hole, lug-type geometry, and loaded hole or lug with surface flaw using LEFM-R...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
..., Westinghouse Electric Co. , 1984 16. Dowling N.E. and Begley J.A. , Fatigue Crack Growth Under Gross Plasticity and J-Integral , Mechanics of Crack Growth , STP 590, American Society for Testing and Materials , 1976 , p 82 – 103 17. Dowling N.E. , Geometry Effects and J...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
...: (Eq 1) a c = ( Y K I C / σ c ) 2 where Y is the crack geometry factor, which equals to 1.1, 0.69, and 0.5, corresponding to surface cracks, corner cracks, and through-thickness edge cracks, respectively; and σ c is the fracture strength that relates...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... correlate with the internal state of stress created by the external loads and component geometry. When the failed component is in multiple pieces and chevrons are visible on the fracture surface, analysis of crack branching (crack bifurcation) ( Fig. 1 ) ( Ref 2 ) can be used to locate the crack initiation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... crack initiation site Fracture surface orientation relative to component geometry and loading conditions Helps separate loading modes I, II, III Identifies macroscale ductile and brittle fracture. (see Fig. 2 ) Both flat fracture and shear lips present on fracture surface Crack...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... on the type of loading, the applied remote nominal stress, σ, the component and crack geometry (geometry factor, Y ), and the crack size, a . The equation for the stress-intensity factor for crack-opening mode I is: (Eq 19) K I = σ π · a · Y An important application in failure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... crack initiation in pressurized skins due to high gross stresses and stress concentration effects from geometric features Development of the fatigue “safe-life” approach Evaluation of the effects of geometry and notches on fatigue behavior Evaluation of the effects of stiffeners on stress distribution...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
.... Dowling N.E. , Geometry Effects and the J-Integral Approach to Elastic-Plastic Fatigue Crack Growth , Cracks and Fracture , American Society for Testing and Materials , 1976 13. Lerch B.A. , Jayaraman N. , and Antolovich S.D. , A Study of Fatigue Damage Mechanisms...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... deflection amplitudes at near-resonance conditions can result in fatigue crack initiation and growth. A medical device manufacturer noted occasional strut fractures during balloon expansion tests associated with the validation of a new stent geometry. These stents had been subjected to typical...