Transactions of Materials and Heat Treatment

Title：Preliminary analysis and experimental research on twisting deformation of slats

Authors： Wang Lei Zhang Ruhua

Unit： Nanchang University Gongqing College Nanchang University

KeyWords： twisting of slat geometric model composite deformation forming property fiber direction Q235 steel

ClassificationCode：TG386；TG14

year,vol(issue):pagenumber：2019,44(3):175-180

Abstract：

A geometric model of twisting deformation for slat was established without considering the factors of thickness, axial shortening and narrowing of width. The analysis shows that the degree of deformation is negatively correlated with the length, positively correlated with the width and the twist angle, and the width affects sensitivity. Then, the sample design was conducted by referring existing research and related material performance test standards, and two kinds of widths, three kinds of thicknesses, uniform lengths, and longitudinal, transverse and thick directions of the fiber for samples were cut on the Q235 steel bar. The direct twisting test was completed by a special test device, and the ultimate distortion data were obtained. The comparison results show that smaller thickness is easy to lose stability, and thicker thickness is more stable, but easy to break. In the actual pure distortion, the influence of the axial shortening of the slats and the narrowing of the width on the deformation cannot be ignored, and the allowable elongation in the literature used as a criterion for the elongation limit of the torsion deformation edge is safe. Furthermore, when the fibers are distributed in the longitudinal direction, the performance of distortion is the best, and it is poor along the thickness direction and lateral direction. It is preliminarily judged that pure distortion bolongs to composite deformation.

Funds：

江西省教育厅科学技术研究项目（GJJ171469）

王磊（1985-），男，硕士，讲师，E-mail：413495509@qq.com；通讯作者：张如华（1958-），男，硕士，教授，E-mail:zhangruhua@ncu.edu.cn

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