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Some Issues Related to the Modeling of Dynamic Shear Localization‐assisted Failure
This chapter reviews adiabatic shear banding (ASB)‐oriented modeling approaches available in the literature that provide a better understanding of ASB and its consequences in structural metals and alloys. ASB is a mechanism of plastic flow localization known to be triggered by a thermo‐mechanical instability in the context of dynamic plasticity. The chapter deals with preliminary considerations and the introduction of basic concepts. It presents some models based on the "small‐scale postulate" and "large‐scale postulate", respectively. The chapter focuses on metals and alloys, even though most of the considerations and concepts presented in the following apply to a wider class of solid materials, including, for example, polymers. It considers three main sources of softening, namely thermal softening, microstructural changes and micro‐damage. The chapter highlights the effect of strong contrast between the transformed material behavior within a shear band and the non‐transformed material outside.
Some Issues Related to the Modeling of Dynamic Shear Localization‐assisted Failure
This chapter reviews adiabatic shear banding (ASB)‐oriented modeling approaches available in the literature that provide a better understanding of ASB and its consequences in structural metals and alloys. ASB is a mechanism of plastic flow localization known to be triggered by a thermo‐mechanical instability in the context of dynamic plasticity. The chapter deals with preliminary considerations and the introduction of basic concepts. It presents some models based on the "small‐scale postulate" and "large‐scale postulate", respectively. The chapter focuses on metals and alloys, even though most of the considerations and concepts presented in the following apply to a wider class of solid materials, including, for example, polymers. It considers three main sources of softening, namely thermal softening, microstructural changes and micro‐damage. The chapter highlights the effect of strong contrast between the transformed material behavior within a shear band and the non‐transformed material outside.
Some Issues Related to the Modeling of Dynamic Shear Localization‐assisted Failure
Lambert, David Edward (editor) / Pasiliao, Crystal L. (editor) / Erzar, Benjamin (editor) / Revil‐Baudard, Benoit (editor) / Cazacu, Oana (editor)
2018-12-31
51 pages
Article/Chapter (Book)
Electronic Resource
English
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