Journal ArticleDOI
Relationships between the J-integral and the crack opening displacement for stationary and extending cracks
TLDR
In this paper, the relationship between the J-integral and the crack opening displacement δt is obtained by exploiting the dominance of the Hutchinson-Rice-Rosengren singularity in the crack-tip region.Abstract:
R elationships between the J-integral and the crack opening displacement δt are obtained by exploiting the dominance of the Hutchinson-Rice-Rosengren singularity in the crack-tip region. The coefficient dn that relates J to δt, is dependent on the material deformation properties and is independent of crack configuration under small-scale yielding conditions. For low hardening materials, dn appears to be configuration dependent in the fully yielded state. Similarly, the slope of the J-resistance curve is relatable to an operationally defined crack opening angle if J-controlled crack growth conditions are met. These relationships are corroborated by finite element results for the complete regime of elastic-plastic deformation and experimental data for A533B steels, HY-80 steels and several other ductile metals.read more
Citations
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Journal ArticleDOI
A fracture-resistant high-entropy alloy for cryogenic applications
Bernd Gludovatz,Anton Hohenwarter,Dhiraj Catoor,Edwin H. Chang,Easo P. George,Easo P. George,Robert O. Ritchie,Robert O. Ritchie +7 more
TL;DR: This work examined a five-element high-entropy alloy, CrMnFeCoNi, which forms a single-phase face-centered cubic solid solution, and found it to have exceptional damage tolerance with tensile strengths above 1 GPa and fracture toughness values exceeding 200 MPa·m1/2.
Journal ArticleDOI
Family of crack-tip fields characterized by a triaxiality parameter—I. Structure of fields
Noel P. O’Dowd,C. F. Shih +1 more
TL;DR: In this article, a two-parameter fracture mechanics approach for tensile mode crack tip states in which the fracture toughness and the resistance curve depend on Q, i.e., JC(Q) and JR(Δa, Q), is proposed.
Journal ArticleDOI
Family of crack-tip fields characterized by a triaxiality parameter—II. Fracture applications
Noel P. O’Dowd,C. F. Shih +1 more
TL;DR: In this paper, the J-dominance is used to define the size scale over which large stresses and strains develop while Q scales the near-tip stress distribution and the stress triaxiality achieved ahead of the crack.
Journal ArticleDOI
The stomatopod dactyl club : a formidable damage-tolerant biological hammer
James C. Weaver,Garrett Milliron,Ali Miserez,Kenneth Evans-Lutterodt,Steven Herrera,Isaias Gallana,William J. Mershon,Brook O. Swanson,Pablo D. Zavattieri,Elaine DiMasi,David Kisailus +10 more
TL;DR: Nature has evolved efficient strategies to synthesize complex mineralized structures that exhibit exceptional damage tolerance, one such example is found in the hypermineralized hammer-like dactyl clubs of the stomatopods, a group of highly aggressive marine crustaceans.
Journal ArticleDOI
A damage-tolerant glass.
Marios D. Demetriou,Maximilien Launey,Maximilien Launey,Glenn Garrett,Joseph P. Schramm,Douglas C. Hofmann,William L. Johnson,Robert O. Ritchie,Robert O. Ritchie +8 more
TL;DR: This result demonstrates that the combination of toughness and strength accessible to amorphous materials extends beyond the benchmark ranges established by the toughest and strongest materials known, thereby pushing the envelope of damage tolerance accessible to a structural metal.
References
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Journal ArticleDOI
A Path Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks
TL;DR: In this paper, an integral is exhibited which has the same value for all paths surrounding a class of notches in two-dimensional deformation fields of linear or non-linear elastic materials.
Journal ArticleDOI
Yielding of steel sheets containing slits
TL;DR: In this article, a relation between extent of plastic yielding and external load applied was investigated, and panels containing internal and edge slits were loaded in tension and lengths of plastic zones were measured.
Journal ArticleDOI
Plane strain deformation near a crack tip in a power-law hardening material
James R. Rice,G. F. Rosengren +1 more
TL;DR: In this paper, the authors investigated the C rack-tip strain singularities with the aid of an energy line integral exhibiting path independence for all contours surrounding a crack tip in a two-dimensional deformation field of an elastic material (or elastic/plastic material treated by a deformation theory).
Journal ArticleDOI
Finite deformation analysis of crack-tip opening in elastic-plastic materials and implications for fracture
TL;DR: In this article, a finite element method was used to analyze the deformation field around smoothly-blunting crack tips in both non-hardening and hardening elastic-plastic materials, under contained plane-strain yielding and subject to mode I opening loads.
Journal ArticleDOI
Elastic-plastic behaviour of polycrystalline metals and composites
TL;DR: Stress-strain curves of polycrystalline metals and composites using single crystal elastoplastic model as discussed by the authors were used to model the stress curve of composites.
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Plane strain deformation near a crack tip in a power-law hardening material
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