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plane-strain fracture toughness

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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
... = δ I ( K r − ρ ) 2 the optimum plane-strain fracture toughnesses are: (Eq 42)   δ mat aw = 0.508   mm  ( 0.0200  in . ) δ mat pwht = 0.134   mm  ( 0.00529  in . ) The maximum stress-intensity factors, χ, ρ, and ρ 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047105
EISBN: 978-1-62708-225-9
... between these orientations. For example, reduction of area averaged 4% in the S-T orientation as opposed to 57% in the L-T, while K Ic (plane-strain fracture toughness) averaged 66 MPa m (60 ksi in. ) in S-T and 104 MPa m (95 ksi in. ) in L-T. A composite photomicrograph...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001142
EISBN: 978-1-62708-228-0
... References 1. JIS G 3116, Steel Sheets Plates and Strip for Gas Cylinders. 2. JIS Z 2201, Test Pieces for Tensile Test for Metallic Materials. 3. ASME E399, Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials. 4. Tada H. , Paris P.C. and Irwin G...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
... in compact tension (ASTM E399) test specimens of the casualty plate, with a plane-strain fracture toughness (K Ic ) of 60 MPa m (55 ksi in. ) at 14°C (58°F), the temperature of brittle fracture in the bridge ( Table 1 ). Furthermore, the same network was observed, but to a lesser extent...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001272
EISBN: 978-1-62708-215-0
... is considered, there is a pre-existing crack (first ductile crack plus the bolt hole diameter) that is about 25 mm (1 in.) long. Using an approximation published by Barsom and Rolfe ( Ref 3 ), the plane strain fracture toughness (K Ic ) is estimated to be about 65 MPa m (60 ksi...
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
... brittle fracture-surface orientation in tensile loading and the difference in fracture toughness for plane-stress and plane-strain loading (see the section “Fracture Mechanics” in later paragraphs). The difference in plane-stress and plane-strain loading is also important in understanding differences...
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
..., consideration of the plane strain state of stress is significant in understanding macroscale brittle fracture surface orientation in tensile loading and the difference in fracture toughness for plane stress and plane strain loading (see the section “Fracture Mechanics” in later paragraphs). The difference...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
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
... to the outside of the specimen, decreasing the widths of the shear lips. When the minimum value of plane-strain toughness ( K Ic ) is reached, the shear lips have very small width. The local state of stress created by a load on a component geometry may cause crack propagation (i.e., critical fracture...
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
... or alternatively, by indicating the presence of shear lips on the fracture surface. Fig. 13 Schematic of variation in fracture toughness and macro-scale features of fracture surfaces for an inherently ductile material. As section thickness ( B ) or preexisting crack length ( a ) increases, plane strain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046210
EISBN: 978-1-62708-235-8
... intensity parameter is equal to the plane-strain fracture toughness K Ic . The problem was that the oil holes from which the crack did not originate interfered with the solutions for the stress intensity parameter. This approach therefore had an element of uncertainty associated with it, and another...
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: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001024
EISBN: 978-1-62708-214-3
...-strain fracture toughness (28.6 MPa m , or 26 ksi in. ), and C and m are constants that can be determined from the da/dn versus Δ K data for the material. The results of the computer simulation showed that, given the properties of the 6061-T651 aluminum ( Fig. 12 ) and the stress...
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
... MnS inclusions and smaller spheroidal carbides). Fracture initiates at (large) MnS inclusions, followed by microscale strain localization on planes of high shear stress. These planes randomly contain smaller carbide particles, which subsequently nucleate voids. This is referred to as void sheet...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... MnS inclusions and smaller spheroidal carbides). Fracture initiates at (large) MnS inclusions, followed by microscale strain localization on planes of high shear stress. These planes randomly contain smaller carbide particles, which subsequently nucleate voids. This is referred to as void sheet...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... sectioning planes. In this case, the average value of the product ( R L · Ψ) on these three planes is 2.17, which is equal to the fracture surface toughness parameter R S of the fracture surface of the composite. The surface roughness parameter is a useful descriptor of fracture surface topography...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... modes during tensile loading. Mode I is plane-strain fracture, where void growth and fibrous tearing occur along a crack plane that is essentially normal to the axis of the tensile load. The fracture appearance typically has a dull and fibrous appearance, as in the classic “cup and-cone” feature...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... to absorb energy and is determined under impact loading in the presence of a notch. Notch toughness is measured by using a variety of specimens, such as the Charpy V-notch impact specimen, Izod impact sample, drop weight impact test, dynamic-tear specimen, and plane-strain fracture toughness specimens under...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001780
EISBN: 978-1-62708-241-9
... striations ( parallel lines ) observed on a fracture near a MnS inclusion ( top left ) Plain strain fracture toughness is a measure of a material’s resistance to unstable crack growth in the presence of a preexisting flaw. The parameter measured is termed K IC . Fracture toughness has long been found...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... of the microvoids, which then grow and coalesce as deformation progresses further. Ductile fracture by void growth and coalescence can occur by two modes during tensile loading. Mode I is plane-strain fracture, where void growth and fibrous tearing occur along a crack plane that is essentially normal to the axis...