An Experimental Study of the Propagation of Transient Longitudinal Deformations in Elastoplastic Media

Sternglass, E. J.; Stuart, D. A.

doi:10.1115/1.4010715

Cited by 52 publications

(1 citation statement)

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“…The SCP physical principle relies on measuring electrical potentials on the surface of the material under study, an increasing dynamic load applied would cause plastic deformation and produce a wave that travels at the elastic speed [9,10]. As defects and cracks grow within metals, they initiate stress waves [11,12] that travel to the surface and lead to an increase in the real contact area due to the increase in the number of contact spots between the material surface and the sensor (transducer of SCP method), consequently leading to the change in the detected contact potential difference between the sensor and the sample (the surface of the studied material).…”

Section: Introductionmentioning

confidence: 99%

Experimental prediction of lead failure under tensile load using scanning contact potentiometry technique

Ghazal¹,

Husein²,

Surin

et al. 2021

Lett. Mater.

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The issue of accurate identifying in advance structural nonhomogeneities of metals is one of the main factors in improving the manufacturing efficiency and safety during service. This paper illustrates the conventional uni-axial tensile test that is carried out on the diffuse and localized necking stages of dog-bone shape lead specimen. The scanning contact potentiometry method was used to locate the rupture zone. Infrared radiation was used to heat the specimen up to 40°C, in order to excite structural nonhomogeneities in the bulk of the tested specimen. It was found that the infrared radiation increases the predictable nonhomogeneity zone. A ductile rupture occurs in the same nonhomogeneity zone that was previously exactly identified using the scanning contact potentiometry method. The formed diffused necking was observed to initiate from the right where the rupture spread diagonally, at an angle of 70° between the tensile axis and the rupture plane. However, the angle between the tensile axis and the hexagonal singular reflex plane was 69°, which was slightly different from the rupture angle. Both results of the rupture angles of the tensile test and the SCP are relatively matching and diverse from the theoretical calculations. The results shown in this work highlight the importance and the efficiency of the experimental SCP method in prediction of the material failure behaviour.

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Section: Introductionmentioning

confidence: 99%