Journal ArticleDOI
On cropping and related processes
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In this article, an expression for the maximum in punch force caused by plastic instability and the initiation and propagation of cracks after the onset of plastic flow was derived in terms of work hardening index of the workpiece, its thickness and state of prestrain.Citations
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Dental Functional Morphology: How Teeth Work
TL;DR: In this article, the basic structure of the mammalian mouth is described and how the mouth operates, including the shape and size of the teeth, and how they fit in the mouth.
Journal ArticleDOI
A modified Gurson model and its application to punch-out experiments
Ken Nahshon,Zhenyu Xue +1 more
TL;DR: A phenomenological modification to the Gurson model that incorporates damage accumulation under shearing has been proposed in this article, which is able to capture the through-thickness development of cracks as well as the punch response.
Journal ArticleDOI
Comparison between Lemaitre and Gurson damage models in crack growth simulation during blanking process
TL;DR: In this article, the numerical results obtained by a finite element analysis in the case of sheet metal blanking process are compared with the experimental ones to verify the validity of Gurson and Lemaitre damage models in describing the initiation and propagation of cracks during the process evolution.
Journal ArticleDOI
The mechanics of the solder ball shear test and the effect of shear rate
TL;DR: In this paper, a test rig was developed to do high speed solder ball shear tests on a servohydraulic testing machine and the results indicated that the specific work after maximum load obtained for low shear rate is closely related to the toughness of the solder.
Journal ArticleDOI
Evaluating high-temperature mechanical behavior of cast Mg–4Zn–xSb magnesium alloys by shear punch testing
Reza Alizadeh,Reza Mahmudi +1 more
TL;DR: In this paper, a high-temperature shear punch test (SPT) was employed to investigate the effects of 0.15, 0.4 and 0.7% Sb additions on the microstructure and mechanical properties of an as-cast Mg-4%Zn alloy.
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Journal ArticleDOI
The correlation of indentation experiments
TL;DR: In this article, a simplified theoretical model of this behaviour is obtained by extending R. Hill's theory of expanding a cylindrical or spherical cavity in an elastic-plastic material to ensure compatibility between the volume of material displaced by the indenter and that accommodated by elastic expansion.
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Overview No. 1: The nucleation of cavities by plastic deformation
S.H. Goods,L.M. Brown +1 more
TL;DR: A review of the literature concerning cavity nucleation as a result of plastic deformation indicates that at low temperatures there is a critical plastic strain required to nucleate a cavity.
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Criterion of crack initiation and spreading
TL;DR: In this article, the area of the true stress/true strain diagram determined under tensile test conditions is equal to the energy absorbed per unit volume at the point of fracture, where the critical specific fracture energy (W c ) characteristic of the material has been absorbed whereby the proportionality law of notched specimens can then be derived.
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On the guillotining of materials
Anthony G. Atkins,Yiu-Wing Mai +1 more
TL;DR: In this article, an analysis for the mechanics of guillotining and experiments on a number of solids are described which agree with the theory, and the analysis is extended to cover the formation of burrs at the cut edge of metal sheets.
Journal ArticleDOI
Fracture toughness and cutting
TL;DR: An exploratory model for cutting is presented in this article, which incorporates fracture toughness as well as the commonly considered effects of plasticity and friction The periodic load fluctuations in cutting force dynamometer tests are predicted, and considerations of chatter and surface finish follow.