Experimental Investigation and Constitutive Description of Railway Wheel/Rail Steels under Medium-Strain-Rate Tensile Loading

High damping capacity is one of the prominent properties of NiTi shape memory alloy (SMA), having applications in many engineering devices to reduce unwanted vibrations. Recent experiments demonstrated that, the hysteresis loop of the stress-strain curve of a NiTi strip/wire under a tensile loading-unloading cycle changed non-monotonically with the loading rate, i.e., a maximum damping capacity was obtained at an intermediate strain rate (ε.critical). This rate dependence is due to the coupling between the temperature dependence of material’s transformation stresses, latent-heat release/absorption in the forward/reverse phase transition and the associated heat exchange between the specimen and the environment. In this paper, a simple analytical model was developed to quantify these thermo-mechanical coupling effects on the damping capacity of the NiTi strips/wires under the tensile loading-unloading cycle. We found that, besides the material thermal/mechanical properties and specimen geometry, environmental condition also affects the damping capacity; and the critical strain rate ε.criticalfor achieving a maximum damping capacity can be changed by varying the environmental condition. The theoretical predictions agree quantitatively with the experiments.

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A numerical and experimental investigation of AZ31 formability at elevated temperatures using a constant strain rate test

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2009.09.009 ◽

2010 ◽

Vol 31 (3) ◽

pp. 1308-1316 ◽

Cited By ~ 28

Author(s):

G. Palumbo ◽

D. Sorgente ◽

L. Tricarico

Keyword(s):

Experimental Investigation ◽

Strain Rate ◽

Elevated Temperatures ◽

Constant Strain Rate ◽

Rate Test

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Analytical and experimental investigation of Effect of geometric parameters on the failure modes in a single lap single bolted metal to GFRP composite bolted joints subjected to axial tensile loading

Materials Today Proceedings ◽

10.1016/j.matpr.2017.07.063 ◽

2017 ◽

Vol 4 (8) ◽

pp. 7345-7350 ◽

Cited By ~ 3

Author(s):

L.V. Awadhani ◽

Anand K. Bewoor

Keyword(s):

Experimental Investigation ◽

Failure Modes ◽

Tensile Loading ◽

Geometric Parameters ◽

Bolted Joints ◽

Axial Tensile ◽

Gfrp Composite

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Experimental investigation of the behaviour of tungsten and molybdenum alloys at high strain-rate and temperature

EPJ Web of Conferences ◽

10.1051/epjconf/20159401021 ◽

2015 ◽

Vol 94 ◽

pp. 01021 ◽

Cited By ~ 4

Author(s):

Martina Scapin ◽

Claudio Fichera ◽

Federico Carra ◽

Lorenzo Peroni

Keyword(s):

Experimental Investigation ◽

High Strain Rate ◽

Strain Rate ◽

High Strain ◽

Molybdenum Alloys

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Interaction between Crack and Aggregate in Concrete under Dynamic Tensile Loading and Strain-Rate Effect on Material Strength

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.5923 ◽

2011 ◽

Vol 243-249 ◽

pp. 5923-5929

Author(s):

Lu Guang Liu ◽

Zhuo Cheng Ou ◽

Zhuo Ping Duan ◽

Yan Liu ◽

Feng Lei Huang

Keyword(s):

Strain Rate ◽

Loading Rate ◽

Interfacial Strength ◽

Aggregate Size ◽

Tensile Loading ◽

Strain Rate Effect ◽

Rate Effect ◽

Material Strength ◽

Crack Penetration ◽

Dynamic Tensile Loading

Crack propagation behaviors at a mortar-aggregate interface in concrete under dynamic tensile loading conditions are investigated numerically. It is found, for a certain interfacial strength and aggregate size, that the crack can penetrate through the interface under an external load with its loading-rate higher than a threshold value. Moreover, for the crack penetration, the smaller the radius of an aggregate, the higher the loading-rate is needed. Therefore, concrete failure energy increase considerably with the loading-rate (or the strain-rate). Such a strain-rate effect on the strength of concrete is in agreement with previous experimental results.

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