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Open AccessArticle

A Tensile Specimen of Tailor Rolled Blanks with Equal Probability in Yield and Its Mechanical Behavior Analysis

1
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
2
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(5), 693; https://doi.org/10.3390/ma11050693
Received: 21 March 2018 / Revised: 20 April 2018 / Accepted: 23 April 2018 / Published: 28 April 2018
(This article belongs to the Section Structure Analysis and Characterization)
In this paper, the microstructure and mechanical properties that distribute regulation along the rolling direction of tailor rolled blanks (TRB) were investigated. A tensile specimen with equal probability in yield (EYS) was first designed considering variation both in thickness and in material strength. The uniaxial tension test was carried out with a digital image correlation method to analyze the mechanical behaviors. The results showed that the strain distribution of EYS was homogeneous. From the results, it can be known that a new design philosophy for a TRB tensile specimen is reasonable and EYS is suitable to characterize the mechanical behavior of TRB. The true stress-strain curves of metal in different cross sections of TRB were calculated. On the basis of the true stress-strain curves, a material model of TRB was constructed and then implemented into finite element simulations of TRB uniaxial tensile tests. The strain distribution of numerical and experimental results was similar and the error between the elongation of the specimen after fracture obtained by experiment and FE ranged from 9.51% to 13.06%. Therefore, the simulation results match well with the experimental results and the material model has high accuracy and as well as practicability. View Full-Text
Keywords: tailor rolled blanks (TRB); uniaxial tensile specimen; mechanical behavior; digital image correlation method; finite elements tailor rolled blanks (TRB); uniaxial tensile specimen; mechanical behavior; digital image correlation method; finite elements
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MDPI and ACS Style

Zhang, S.; Liu, X.; Liu, L. A Tensile Specimen of Tailor Rolled Blanks with Equal Probability in Yield and Its Mechanical Behavior Analysis. Materials 2018, 11, 693.

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