Results 31 to 40 of about 216 (120)
NanomaterialsMetallic nanolaminates generally show ultra-high strength but low ductility due to their vulnerability to shear instability during deformation. Herein, we report the simultaneous enhancement in hardness (by 11.9%) and suppression of shear instability in ...
Feihu Chen, Feng Qin
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The dynamics of a shear band [PDF]
Journal of the Mechanics and Physics of Solids, 2018 A shear band of finite length, formed inside a ductile material at a certain stage of a con- tinued homogeneous strain, provides a dynamic perturbation to an incident wave field, which strongly influences the dynamics of the material and affects its path to failure. The investigation of this perturbation is presented for a ductile metal, with reference
Diana Giarola +2 more
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Shear-banding instability in arbitrarily inelastic granular shear flows [PDF]
Physical Review E, 2019 One prototypical instability in granular flows is the shear-banding instability, in which a uniform granular shear flow breaks into alternating bands of dense and dilute clusters of particles having low and high shear (shear stress or shear rate), respectively.
Priyanka Shukla +2 more
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Analysis of serrations and shear bands fractality in UFGs
Journal of the Mechanical Behavior of Materials, 2015 Tsallis nonextensive statistics is employed to characterize serrated flow, as well as multiple shear band formation in ultrafine grain (UFG) size materials. Two such UFG materials, a bi-modal Al-Mg alloy and a Fe-Cu alloy, were chosen. In the first case,
Iliopoulos Aggelos C. +2 more
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Minimal model for chaotic shear banding in shear thickening fluids [PDF]
Physical Review E, 2006 Revised version (in particular, new section III.E. and Appendix A)
Aradian, A., Cates, M. E.
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NanomaterialsShear banding is much dependent on the glass–glass interfaces (GGIs) in metallic nanoglasses (NGs). Nevertheless, the current understanding of the glass phase of GGIs is not well established for controlling the shear banding in NGs.
Tian Li +3 more
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Elasto-plastic behavior of amorphous materials: a brief review
Comptes Rendus. Physique, 2021 Disordered materials, like metallic glasses or silicate glasses, have an atomistic amorphous structure preventing the formation of extended defects such as dislocations.
Tanguy, Anne
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Extreme rejuvenation and softening in a bulk metallic glass
Nature Communications, 2018 Deforming metallic glasses can rejuvenate them to higher energy states, but only in the shear bands where deformation is usually concentrated. Here, the authors use a notched setup to suppress shear banding and promote significant bulk softening of a ...
J. Pan +5 more
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Dynamic interaction of multiple shear bands [PDF]
Scientific Reports, 2018 AbstractA mechanical model for waves impinging different configurations of multiple shear bands already formed in a ductile material, allows to analyze the ways in which dynamic interactions promote failure. It is shown that the presence of more than one shear band may lead to resonance and correspondent growth of a shear band or, conversely, to its ...
Giarola, Diana +2 more
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Atomistic Origin of Rate-Dependent Serrated Plastic Flow in Metallic Glasses
Nanoscale Research Letters, 2008 Nanoindentation simulations on a binary metallic glass were performed under various strain rates by using molecular dynamics. The rate-dependent serrated plastic flow was clearly observed, and the spatiotemporal behavior of its underlying irreversible ...
Yao YG, Jiang SY, Jiang MQ, Dai LH
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