Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications

Authors

  • Adewole, K. K. School of Chemical Engineering and Advanced Materials, New¬castle University, Newcastle upon Tyne
  • Bull, S. J. School of Chemical Engineering and Advanced Materials, New¬castle University, Newcastle upon Tyne

:

https://doi.org/10.9744/ced.16.1.18-23

Keywords:

Carbon steel bars, hardness, microstructure, reverse bending and straightening, tensile property.

Abstract

This paper presents an experimental investigation of the effects of reverse bending and straightening process on the mechanical properties of a typical carbon steel bar used for civil engineering applications. Twenty four specimens each were used for the metallogarphy, microhardness and tensile tests. The investigation revealed that the reverse bending and straightening process has no significant effect on the bars’ through-thickness microstructure and hardness. However, the reverse bending and straightening process reduces the yield load, ultimate load, and displacement at fracture of the bars by 4.27%, 2.58%, and 18.62% respectively. These results highlight the need to take into consideration the effects of the previous loading history of the bars/wires, particularly the reduction in the displacement at fracture and consequently, the ductility of the bars/wires in the design and fitness for purpose assessment of components made from them, since the bars/wires could experience high strain during installation and in service due to overloads.

References

Sengupta, A. K. and Menon, D., Pre-Stressed Concrete Structures, Indian Institute of Technology, Madras, http://nptel.iitm.ac.in/courses/ IITMADRAS/PreStressed-Concrete-Structures/ pdf/1_Introduction/1.7_Prestressing_Steel.pdf, assessed on 25/09/2012.

Smith, B.O., Jenning, A.P.H., and Grimshaw, A.G., A Portable Lamination Detector for Steel Sheet, The British Iron and Steel Research Association, Battersea Park Road, London, 1957.

Gillstrom, P. and Jarl, M., Mechanical Descaling of Wire Rod using Reverse Bending and Brushing, Journal of Materials Processing Technology, 172, 2006, pp. 332-340.[CrossRef]

ASTM E8M., Standard Test Method for Tension Testing of Metallic Materials, American Society for Testing of Materials, 2009.

BS EN 10002-1, Tensile Testing of Metallic Materials. Method of Test at Ambient Temperature, British Standards Institutes, 2001.

Takeda, T. and Chen Z. Yield Behavior of Mild Steel after Prestraining and Aging under Reversed Stress. Metallurgical and Materials Transactions A, 30, 1999, pp. 411-416.

Han, K., Van Tyne, C.J., and Levy, B.S., Effect of Strain and Strain Rate on the Bauschinger Effect Response of Three Different Steels, Metallurgical and Material Transactions A, 36, 2005, pp. 2379-2384.

Terada K., Matsui, K., Akiyama, M., and Kuboki T., Numerical Re-examination of the Microscale Mechanism of the Bauschinger Effect in Carbon Steels, Computational Material Science, 31, 2004, pp. 67-83.[CrossRef]

Boger, R.K., Wagoner, R.H., Barlat, F., Lee, M.G., and Chung K., Continuous Large Strain Tension/Compression Testing of Sheet Material, International Journal of Plasticity, 21, 2005, pp. 2319-2343.[CrossRef]

United States Bureau of Reclamation, Prestressed Concrete Pipe Failure, Jordan Aqueduct, Reach 3. All U.S. Government Documents (Utah Regional Depository). Paper 284, http://digital-commons.usu.edu/govdocs/284, 1994, assessed on 15/11/2012.

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Published

2014-03-01

How to Cite

K. K., A., & S. J., B. (2014). Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications. Civil Engineering Dimension, 16(1), 18-23. https://doi.org/10.9744/ced.16.1.18-23

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Articles