待矫直板材板形缺陷解析表征

doi:10.13228/j.boyuan.issn0449-749x.20150524

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Abstract It is very uncertain that the judgment about shape defect types and extents of pre-levelling sheet still depends on the experience of field staff at present. According to the buckling theory of thin plates with large deflection and the principle of minimum potential energy，the inverse solution method is established by using geometric parameters of shape-wave. With the method，the magnitude and distribution of residual strain and stress of pre-levelling sheet are studied. Based on the measured geometric parameters of shape wave and preset bending function， the residual strain and stress of typical shape-wave， such as center wave，edge wave and quarter wave，are solved and compared with measured values. The results show that the distribution of residual strain and stress is corresponding to the geometric parameters of shape-wave，but the compressive stress width is smaller than the buckling width. It means that bending occurred in the tensile stress zone which is close to the compressive stress zone. The influence of geometric nonlinearity and post-buckling on the shape-wave is obvious. The solution process with less parameters is independent of thickness and convenient for field application.

Received: 20 October 2015 Published: 11 July 2016

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	GAO Ya-Na
	PENG Yan

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GAO Ya-Na,PENG Yan. Shape defect analytical characterization of pre-levelling sheet[J]. Iron and Steel, 2016, 51(7): 51-56.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20150524 OR http://www.chinamet.cn/Jweb_gt/EN/Y2016/V51/I7/51

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