Nanostructures

Adiabatic Shear Localization by Yilong Bai PDF

By Yilong Bai

ISBN-10: 0080977812

ISBN-13: 9780080977812

Adiabatic shear localization is a method of failure that happens in dynamic loading. it truly is characterised via thermal softening happening over a truly slender quarter of a cloth 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 unique examine of the mechanics and modes of adiabatic shear localization in solids. development at the good fortune of the 1st version, the booklet offers a scientific description of a couple of elements of adiabatic shear banding. The thoughts and strategies defined during this paintings can usefully be utilized to resolve a mess of difficulties encountered by way of these investigating fracture and harm in fabrics, impression dynamics, steel operating and different parts. particular chapters specialise in lively fabrics, polymers, bulk steel glasses, and the maths of shear banding in addition to the numerical modeling of them. With its specific assurance of the topic, this booklet is of significant curiosity to teachers and researchers into fabrics functionality in addition to professionals.

  • Up-to-date assurance of the topic and examine that has happened over the last 20 years
  • Each bankruptcy is written on a distinct sub-field of adiabatic shear via an stated professional within the field
  • Detailed and transparent discussions of every aspect

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67] conducted the influence of a confining pressure on the failure behaviour of a compression specimen in a Hopkinson bar for a magnesium and titanium alloy. They found that the failure strain is increased with increasing hydrostatic pressure. Odeshi et al. [74] examined the propensity of adiabatic shear failure for aluminium 6061 T6 matrix composites reinforced with alumina particles tested in a direct Hopkinson apparatus. The reinforced material conditions show a higher propensity to adiabatic shear failure than the unreinforced condition.

Meyer and Staskewitsch [84] investigated the influence of inclination of the compression/shear specimen to their shear-failure behaviour of TiÀ6AlÀ4V for drop-weight tower loading conditions. With increased inclination of the specimen, the ratio of shear to compressive load, the failure strain and the ultimate compressive strength are decreasing. Further investigations were carried out by Meyer et al. [27] for TiÀ6AlÀ4V and a tungsten alloy with various specimen inclinations. The development of shear bands was determined by microscopy and finite element simulations of the compression/shear specimen.

Due to the geometry, very high strains at high strain rates can be reached, but the shear-stress measurement is influenced by edge effects. The shear deformability can be measured and assessed. To investigate the microstructure of shear band formation, the displacement of the hat specimen can be limited easily in the axial direction by using stopper rings. Beatty et al. [32] did experiments on an AISI 4340 steel using the hat specimen to examine the shear band formation of high-strength steels at high loading rates.

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