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By Yilong Bai

Adiabatic shear localization is a method of failure that happens in dynamic loading. it's characterised via thermal softening taking place over a really slim area 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 specific research of the mechanics and modes of adiabatic shear localization in solids. construction at the good fortune of the 1st variation, the booklet offers a scientific description of a few elements of adiabatic shear banding. The suggestions and methods defined during this paintings can usefully be utilized to resolve a large number of difficulties encountered by way of these investigating fracture and harm in fabrics, influence dynamics, steel operating and different components. particular chapters specialise in lively fabrics, polymers, bulk steel glasses, and the math of shear banding in addition to the numerical modeling of them. With its specified assurance of the topic, this ebook is of significant curiosity to teachers and researchers into fabrics functionality in addition to professionals.

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

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Example text

50) in an instrumented pendulum-type impact machine. 49 Direct Hopkinson assembly for double-shear testing, according to Klepaczko [119]. 50 Double-shear specimen, according to Olson et al. [121]. Pn V narrow to keep the bending influences of the results on a low level. The failure begins at the groove with unknown local stress distributions. At large deformations, a pure shear deformation cannot be ensured. Because of the uncertainties of stress state in the groove and the inhomogeneous shear strain distribution, the double-notched shear test is not widely used.

2 h Δx 2 10 + Δd 10 18 Cylindrical Hat Specimen Flat Hat Specimen into three stages. Stage I is the pre-localization phase, stage II is the localization phase and stage III is the post-localization phase. The localization was not only created by the instability of the uniformly strained zone but also by edge effects. The failure does not occur simultaneously along the whole shear zone. The shear bands were formed during the post-localization phase by the process of friction. 45% carbon steel at the beginning of the localization are about 200À250 C, 500 C at the beginning of the post-localization phase and 850 C at the end of the post-localization phase.

They found that DP steel has a higher susceptibility to shear failure than a pure martensitic steel. Hanina et al. [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.

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