Dynamic brittle fracture of high strength structural steels under conditions of plane strain
type: Item
instance of: scholarly article
title: Dynamic brittle fracture of high strength structural steels under conditions of plane strain
zbMATH Open document ID: 0945.74059
DOI: 10.1016/S0020-7683(98)00151-6
author: Youngseog Lee
author: Vikas Prakash
published in: International Journal of Solids and Structures
publication date: 2000-03-13T00:00:00Z
review text: This paper is devoted to the study of the validity of cohesive surface models in predicting fast fracture dynamics in high-strength structural steels. For solution of this problem, the authors apply the low temperature, plate-impact fracture experiments on 4340VAR steel and perform finite element analysis. The considered dynamic fracture models incorporating the decohesion of fracture surfaces provide qualitative understanding of dynamic crack behavior under intense stress pulse loading. The analysis includes a plane-strain fracture of an edge cracked steel specimen under plane wave loading conditions, and at temperature lower than room temperature. The experimental results are achieved impacting a disk-shaped specimen containing a mid-plane crack by a thin flyer plate. For better evaluation of various fracture models, the motion of four different points on the specimen surface have been measured simultaneously during the experiment by interferometer. In computational analysis the continuum is characterized by two constitutive relations: a volumetric law of an isotropically hardening and thermally softening elastic-viscoplastic von Mises solid, and a cohesive surface constitutive relation involving the tractions and displacement jumps across the cohesive surface. The finite element formulation accounts for the effects of finite geometry changes, material inertia, material rate sensitivity and heat conduction. The finite element discretization is based on the linear triangular elements that are arranged in a ``crossed-triangle'' quadrilateral pattern, and in which the displacements and temperature vary linearly, accomodating isochoric deformation. The computational analysis shows that the cohesive surface model, which includes a cohesive surface strength and a characteristic length, is not capable of predicting the dynamic crack growth observed in the experiments. The computed free surface particle velocity profiles agree with experimental ones either during the init…
Mathematics Subject Classification ID: 74R10
Mathematics Subject Classification ID: 74R15
Mathematics Subject Classification ID: 74M20
Mathematics Subject Classification ID: 74S05
Mathematics Subject Classification ID: 74-05
zbMATH DE Number: 1341400
zbMATH Keywords: high-strength structural steels
zbMATH Keywords: dynamic low temperature fracture
zbMATH Keywords: impact test
zbMATH Keywords: 4340VAR steel
zbMATH Keywords: finite element analysis
zbMATH Keywords: dynamic fracture
zbMATH Keywords: intense stress pulse loading
zbMATH Keywords: plain-strain fracture
zbMATH Keywords: plane wave loading
zbMATH Keywords: elastic-viscoplastic von Mises solid
zbMATH Keywords: linear triangular elements
zbMATH Keywords: isochoric deformation
zbMATH Keywords: rate-dependent cohesive surface model
zbMATH Keywords: \(J\)-integral
zbMATH Keywords: fracture toughness
zbMATH Keywords: energy partitioning
zbMATH Keywords: von Mises effective stress
zbMATH Keywords: effective plastic strain
reviewed by: Ivan A. Parinov
MaRDI profile type: Publication
full work available at URL: s0020-7683(98)00151-6
OpenAlex ID: W1976822763
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description: scientific article; zbMATH DE number 1341400