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linear elastic fracture toughness

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003224
EISBN: 978-1-62708-199-3
.... failure analysis fatigue fracture fatigue life fracture control concepts fracture mechanics linear-elastic fracture mechanics A FAILURE INVESTIGATION can have various objectives, such as assigning blame for the failure, or pin-pointing a lax supplier or an individual or department...
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
... mechanics analysis linear elastic fracture mechanics analysis stress analysis equations stress analysis THE STRESSES acting on a component may cause unacceptable deformation, cracking, or fracture. By definition, after a stress-related failure has occurred, it is a given that the stresses reached a...
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
... loading in a corrosive environment (stress-corrosion fatigue), and elastic buckling. Elastic buckling may cause parts to contact, causing seizure of a rotating system, but it may also lead to plastic buckling and ultimately to fracture. The purpose of this article is to introduce the subject of...
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
... tensile straining until the temperature was decreased to 119 K, but then the number of grains having twins increased rapidly, reaching 60% at 83 K ( Ref 23 ). Additionally, a not-quite-linear correlation was found between the lower yield strength and the number of grains containing twins, leading to the...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005220
EISBN: 978-1-62708-187-0
... unfurling on mechanical properties of the solidified cast metal. It provides a discussion on the mechanisms of unfurling to determine the casting properties of the metals. These include gas precipitation, shrinkage, linear contraction, dendrite pushing, and nucleation and growth of intermetallics. The...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... compressive) stress. Any other combination is known as a fluctuating stress. The linear-elastic fracture-mechanics approach is based on an analytical procedure that relates the stress-field magnitude and distribution in the vicinity of a crack tip to the nominal stress applied to the structure; to the...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... will result in a straight line if Eq 17 is satisfied by the data ( Fig. 6 ). The linear slope of this line is n , and K is the true stress at ε=1.0 (corresponds to q =0.63). As shown in Fig. 7 , the strain-hardening exponent may have values from n =0 (perfectly plastic solid) to n =1 (elastic...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... substantial σ phase. All 240× Examination of properly polished specimens without etching often presents a clearer picture of the extent of fracture because etched microstructural detail does not obscure the crack detail. Etching presents other dark linear features, such as grain boundaries, that may be...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... Abstract This article reviews the various types of mechanical testing methods, including hardness testing; tension testing; compression testing; dynamic fracture testing; fracture toughness testing; fatigue life testing; fatigue crack growth testing; and creep, stress-rupture, and stress...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
... conditions are changing systematically. Wear testing of many materials results in a linear variation of wear with load. It is therefore tempting to extrapolate such data to higher load situations, especially because simple wear models generally predict a linear load dependence. However, this is not a...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003060
EISBN: 978-1-62708-200-6
... is frequently a large scatter in the strength data. The first property manifests itself in that the material has a linear stress-strain relationship all the way from zero stress to failure. This linear relationship by itself is attractive to analysts because it makes the modeling process easier...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003058
EISBN: 978-1-62708-200-6
... analyses can provide insight into the role of loading conditions and crack geometry. In ceramics, crack growth occurs by truly brittle fracture. The ceramic behaves linear-elastically on a global scale, as well as locally at the crack tip up to the point where atomic bond rupture occurs. As a result...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
...-intensity factor, K Ic , obtained under plane-strain linear-elastic conditions. However, because of the ductility of ductile irons, most investigations of ferritic and pearlitic/ferritic irons have been conducted at subzero temperatures to obtain the necessary criteria of elastic behavior. Values ranging...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
... determining elements such as phosphorus, sulfur, tungsten, tin, and boron, which are not normally determined by atomic absorption. Other analytical characteristics include a wide linear working range, low limits of detection, and freedom from chemical interferences. Spectral interferences are a serious...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005677
EISBN: 978-1-62708-198-6
...-1200C Human enamel Compressive strength, MPa (ksi) 380 (55) 400 (58) Young's modulus, GPa (psi × 10 6 ) 120 (17.4) 80 (11.6) Knoop hardness, kg/mm 2 450 340 Density, g/cm 3 3.1 2.96 Coefficient of friction 0.24 0.36 Linear coefficient of thermal expansion, 10 −6 / °C...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... material Property Desired value Fracture toughness High, >5 MPa m (>4.5 ksi in. ) Hardness High, >1200 kg · mm −2 Elastic modulus Low, <210 GPa (<30 × 10 6 psi) Density Low, <4 g/cm 2 (<0.14 lb/in. 3 ) Bend strength High, >700 MPa (&gt...
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
... characteristics can act singly or combine synergistically to reduce the strength, ductility, and toughness of metallic materials. These factors must also be considered in the evaluation and prevention of overload failures. Therefore, throughout this article, the term overload failure implies fracture due to...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... boiler steels. Source: Ref 14 Creep damage of metallic materials in the power-generation industry can be monitored through in situ Vickers hardness tests. For example, in chromium-molybdenum steels, an almost linear decrease in hardness has been observed during the secondary creep stage...
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
... defined by fracture, which means by the total separation of the structure. The fatigue limit and the high-cycle regime of the S - N curve are usually within the linear-elastic range and can therefore be based on loads, nominal stresses, structural stresses, or local stresses. For elastic-plastic...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
... ″ where n is the strain-hardening exponent, and K is the strength coefficient. A log-log plot of true stress and true strain up to maximum load results in a straight line if Eq 22 is satisfied by the data ( Fig. 7 ). The linear slope of this line is n , and K is the true stress at ε = 1.0...