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Adiabatic Shear Localization by Yilong Bai PDF

By Yilong Bai

ISBN-10: 0080977812

ISBN-13: 9780080977812

Adiabatic shear localization is a style of failure that happens in dynamic loading. it truly is characterised by way of thermal softening taking place over a truly slender sector of a fabric and can be a precursor to ductile fracture and catastrophic failure. This reference resource is the revised and up-to-date model of the 1st distinct research of the mechanics and modes of adiabatic shear localization in solids. development at the luck of the 1st version, the ebook offers a scientific description of a couple of facets of adiabatic shear banding. The options and methods defined during this paintings can usefully be utilized to resolve a mess of difficulties encountered via these investigating fracture and harm in fabrics, effect dynamics, steel operating and different components. particular chapters specialize in lively fabrics, polymers, bulk steel glasses, and the math of shear banding in addition to the numerical modeling of them. With its certain assurance of the topic, this booklet is of significant curiosity to teachers and researchers into fabrics functionality in addition to professionals.

  • Up-to-date insurance of the topic and learn that has happened over the last 20 years
  • Each bankruptcy is written on a special sub-field of adiabatic shear by means of an stated professional within the field
  • Detailed and transparent discussions of every aspect

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Sample text

Strain rates between 102 and 103 s21 can be reached. Marchand and Duffy [15] determined the shear-stressÀshear-strain behaviour of a HY100 steel with a torsional Kolsky bar. The same specimen geometry was used by Hwang et al. [16]. They measured the local temperature on the surface and determined the strain distribution during the shearing process, and, respectively, the shear band formation process. Similar investigations with the same test procedure and specimen were done on AISI 4340 steel by Mgbokwere et al.

53] conducted different tests on tantalum in the as-received as well as in pre-shocked conditions at different temperatures. The material was examined under dynamic compression test in a Hopkinson bar, in shear deformation with hatshaped specimens where the punch diameter was slightly larger than the hole diameter as well as in the explosively driven TWC test. With low temperature and in the pre-shocked condition, the propensity is for adiabatic shear failure. Xu et al. [64] conducted dynamic compression tests in the Hopkinson bar assembly at room temperature and 77 K for the Al-alloy AA 8090.

Punch Test A punch test can be conducted in a Hopkinson bar assembly or in a drop-weight tower. The punch test and the double-shear testing assembly were evolved to reach higher strain rates as in a torsional Kolsky bar. According to Bai and Dodd [8], a punch test is a simple procedure, where the projectile or punch is designed flat. 34. 35, where the punch is accelerated by a falling weight. Loading velocities up to 23 m/s were reached. 34 Schematic assembly of a punch test, according to Bai and Dodd [8].

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Adiabatic Shear Localization by Yilong Bai

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