An investigation on the safe slitting interval in measuring the residual stresses

سال انتشار: 1396
محل انتشار: کنفرانس دو سالانه بین المللی مکانیک جامدات تجربی
کد COI اختصاصی: WMECH04_104
زبان مقاله: انگلیسی
تعداد مشاهده: 394

نویسندگان

Graduate student, Department of Mechanical Engineering, Iran university of science and technology, Tehran, ۱۶۸۴۶-۱۳۱۱۴,Iran

M.M Shokrieh

Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics andDynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran۱۶۸۴۶-۱۳۱۱۴, Iran

چکیده

In the present paper, a novel approach based on the eigen-strain concept is presented to achievethe repeatability of the slitting experiment. A new parameter which specifies the residual stresses reductionzone was defined. Using this parameter, the proper distance of a new slit from the previous slit werecalculated in order to diminish the effect of the previous one. Using the finite element simulation, it wasillustrated that this interval eliminates the influence of the stress fileds of slits on each other. Eventually,four distinct slits were created on a four-point aluminum bending specimen that contained an identicaleigen-strain distribution through the thickness. Elastic strains were measured at the strain gage location andthe residual stresses were computed using the Tikhonov regularization. The results depicted that theproposed method is successful to determine the safe slitting intervals.

کلیدواژه ها

Slitting method, Residual stresses, safe slitting interval

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