Experimental investigation of the yielding process of a ductile polycarbonate cylinder subjected to line loading using digital image correlation

Ma, Shuping; Pang, Jiazhi; Ma, Qingsong; Xian, Wang; Wang, Hongtao

doi:10.1016/j.polymertesting.2013.01.006

Cited by 9 publications

(4 citation statements)

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“…An experimental investigation conducted by Ma et al [11] showed that a certain area in the contact structure began to yield following the elastic stage, while the global behaviour remained linear for a yielding area that is not large enough. As shown in Fig.…”

Section: Contact Strengthmentioning

confidence: 99%

“…From the derived curve, the elastic modulus E, Poisson's ratio ν, and yield strength σs were obtained. Because the maximum shear stress criterion is typically used to characterize the mechanical behaviour of PI [11], the shear yield strength τs was calculated as σs/2, as listed in Table. 1. Both E and σs decrease with increases in temperature.…”

Section: Mechanism Of Temperature Effect On the Contact Strength Of Pmentioning

confidence: 99%

“…For example, for the line contact structure of a cylinder with radius R and length L compressed onto a plate with load P, a rectangular contact area forms with width 2b. According to Hertzian contact theory [10] and previous studies [11], the corresponding average stress σave (where σave = P/2bL) of the inflection point of the curve plotting σave vs. b/R is considered to be the contact strength of the structure. Therefore, measuring b, which is the half-width of the rectangular contact area, is necessary to obtain the contact strength.…”

Section: Introductionmentioning

confidence: 99%

“…Cylindrical line contact structure and its yielding procedure: (a) schematic of the contact structure; (b) deformation and yielding progression of the cylinder[11].…”

mentioning

confidence: 99%

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Experimental investigation of the effect of temperature on the strength of polyimide contact structures

Liu

Wang

et al. 2016

Polymer Testing

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A new photogrammetry based measurement technique for contact areas in line contact structures is developed. From the data collected by this technique, a method for measuring the contact strength of contact structures in high temperature applications is proposed. The contact strength of a line contact structure of polyimide at different temperatures is measured; the results show that the increase in temperature decreases the contact strength of the structure. The effect of temperature on the contact strength is studied by investigating the occurrence and evolution of yielding core within the structure at different temperatures. The decrease in the yield strength and elastic modulus of the polyimide material at high temperature induces core yielding at lower loads and eases the propagation of core yielding to the surface.

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Section: Contact Strengthmentioning

confidence: 99%

Section: Mechanism Of Temperature Effect On the Contact Strength Of Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Cylindrical line contact structure and its yielding procedure: (a) schematic of the contact structure; (b) deformation and yielding progression of the cylinder[11].…”

mentioning

confidence: 99%

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