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Large Strain Shear Compression Test of Sheet Metal Specimens

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Abstract

A hybrid experimental-computational procedure to establish accurate true stress-plastic strain curve of sheet metal specimen covering the large plastic strain region using shear compression test data is described. A new shear compression jig assembly with a machined gage slot inclined at 35° to the horizontal plane of the assembly is designed and fabricated. The novel design of the shear compression jig assembly fulfills the requirement to maintain a uniform volume of yielded material with characteristic maximum plastic strain level across the gage region of the Shear Compression Metal Sheet (SCMS) specimen. The approach relies on a one-to-one correlation between measured global load–displacement response of the shear compression jig assembly with SCMS specimen to the local stress-plastic strain behavior of the material. Such correlations have been demonstrated using finite element (FE) simulation of the shear compression test. Coefficients of the proposed correlations and their dependency on relative plastic modulus were determined. The procedure has been established for materials with relative plastic modulus in the range 5 × 10−4 < (E p /E) < 0.01. It can be readily extended to materials with relative plastic modulus values beyond the range considered in this study. Nonlinear characteristic hardening of the material could be established through piecewise linear consideration of the measured load–displacement curve. Validity of the procedure is established by close comparison of measured and FE-predicted load–displacement curve when the provisional hardening curve is employed as input material data in the simulation. The procedure has successfully been demonstrated in establishing the true stress-plastic strain curve of a demonstrator 0.0627C steel SCMS specimen to a plastic strain level of 49.2 pct.

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Acknowledgments

This work is supported by the Ministry of Science, Technology and Innovation (MOSTI), Malaysia through Technofund Research Grant No. 79909 and by Sebha University, Libya through UTM Grant No. 73746.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia

    A. Borhana, H. O. Ali & M. N. Tamin

  2. Faculty of Mechanical Engineering, Sebha University, Sabha, Libya

    A. Borhana

Authors
  1. A. Borhana
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  2. H. O. Ali
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  3. M. N. Tamin
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Corresponding author

Correspondence to M. N. Tamin.

Appendix

Appendix

Details on geometry and dimensions of the shear compression jig assembly is illustrated in Figs. 15 and 16, along with definitions of variables used in the text.

Fig. 15
figure 15

Drawings of inner loading parts and the outer guide cylinder of the shear compression jig assembly illustrating geometrical parameters used in the study. Dimensions in mm

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Fig. 16
figure 16

Shear compression jig assembly illustrating the global load and displacement variables used in the study

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Borhana, A., Ali, H.O. & Tamin, M.N. Large Strain Shear Compression Test of Sheet Metal Specimens. Exp Mech 53, 1449–1460 (2013). https://doi.org/10.1007/s11340-013-9763-0

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