A critical review of experimental results and constitutive descriptions for metals and alloys in hot working

Refining a metal’s grain size can result in dramatic increases in strength, and the magnitude of this strengthening increment can be estimated using the Hall–Petch equation. Since the Hall–Petch equation was proposed, there have been many experimental studies supporting its applicability to pure metals, intermetallics and multi-phase alloys. In this article, we gather the grain-size strengthening data from the Hall–Petch studies on pure metals and use this aggregated data to calculate best estimates of these metals’ Hall–Petch parameters. We also use this aggregated data to re-evaluate the various models developed to physically support the Hall–Petch scaling.

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Six decades of the Hall–Petch effect – a survey of grain-size strengthening studies on pure metals

Quasi-static and dynamic loading responses and constitutive modeling of titanium alloys

http://li.mit.edu/Stuff/RHW/Upload/14.pdf

A plastic constitutive equation incorporating strain, strain-rate, and temperature

The properties of poly(tetrafluoroethylene) (PTFE) in tension

Finite deformation of a polymer: experiments and modeling

Nanocrystalline aluminum and iron: Mechanical behavior at quasi-static and high strain rates, and constitutive modeling

Mechanical response and modeling of fully compacted nanocrystalline iron and copper

New insights into vesicle granulation in Citrus grandis revealed by systematic analysis of sugar- and acid-related genes and metabolites

At present, polyurethane (PU) has been extensively used as a grouting material in civil engineering. The mechanical properties of PU are the key to achieving the desirable grouting effect. This study presents the research results of the mechanical behavior of PU matrix under tensile, successive cyclic tensile, and stress relaxation at the nanoscale, using the coarse-grained molecular dynamics simulation method. The influences of the number of molecule chains and strain rate on the tensile mechanical properties are discussed, and the tensile deformation mechanism of PU matrix is revealed. The tensile strength of PU matrix is independent of loading path, and after yielding, the strain of PU matrix contains the elastic strain, plastic strain, and viscous strain. In the stress relaxation process, the evolution of the axial stress is mainly caused by the varied van der Waals interactions. The stress relaxation behavior of PU matrix can be described by the viscoelastic model consisting of one elastic element in parallel with one Maxwell element.

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Molecular Dynamics Simulations of Polymer Grouting Material: Its Mechanical Behavior under Uniaxial Tension, Cyclic Tensile Loading, and Stress Relaxation

Haoyue Zhang

Papers

Finite deformation of a polymer: experiments and modeling

Nanocrystalline aluminum and iron: Mechanical behavior at quasi-static and high strain rates, and constitutive modeling

Mechanical response and modeling of fully compacted nanocrystalline iron and copper

New insights into vesicle granulation in Citrus grandis revealed by systematic analysis of sugar- and acid-related genes and metabolites

Molecular Dynamics Simulations of Polymer Grouting Material: Its Mechanical Behavior under Uniaxial Tension, Cyclic Tensile Loading, and Stress Relaxation