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Determination of constant parameters of copper as power-law hardening material at different test conditions

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In this paper a technique has been developed to determine constant parameters of copper as a power-law hardening material by tensile test approach. A work-hardening process is used to describe the increase of the stress level necessary to continue plastic deformation. A computer program is used to show the variation of the stress-strain relation for different values of stress hardening exponent, n and power-law hardening constant, α . Due to its close tolerances, excellent corrosion resistance and high material strength, in this analysis copper (Cu) has been selected as the material. As a power-law hardening material, Cu has been used to compute stress hardening exponent, n and power-law hardening constant, α from tensile test experiment without heat treatment and after heat treatment. A wealth of information about mechanical behavior of a material can be determined by conducting a simple tensile test in which a cylindrical specimen of a uniform cross-section is pulled until it ruptures or fractures into separate pieces. The original cross sectional area and gauge length are measured prior to conducting the test and the applied load and gauge deformation are continuously measured throughout the test. Based on the initial geometry of the sample, the engineering stress-strain behavior (stress-strain curve) can be easily generated from which numerous mechanical properties, such as the yield strength and elastic modulus, can be determined. A universal testing machine is utilized to apply the load in a continuously increasing (ramp) manner according to ASTM specifications. Finally, theoretical results are compared with these obtained from experiments where the nature of curves is found similar to each other. It is observed that there is a significant change of the value of n obtained with and without heat treatment it means the value of n should be determined for the heat treated condition of copper material for their applications in engineering fields.
Rocznik
Strony
687--698
Opis fizyczny
Bibliogr. 25 poz., rys., tab., wykr.
Twórcy
autor
  • Department of Mechanical Engineering Dhaka University of Engineering and Technology (DUET) Gazipur, BANGLADESH
autor
  • Department of Mechanical Engineering Dhaka University of Engineering and Technology (DUET) Gazipur, BANGLADESH
Bibliografia
  • [1] Available: http://www.webelements.com/copper/physics.htm
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  • [9] Kowser M.A. and Mahiuddin M. (2012): Technique for determining the constant parameters of power-law hardening material by tensile test. - Proceedings of 6 IMEC & 14 APM, Dhaka, Bangladesh.
  • [10] Kowser M.A. and Mahiuddin M. (2013): Technique for determining the constant parameters of Cu as a power-law hardening material at different conditions. - Proceedings of ICERIE, SUST, Sylhet, Bangladesh, Jan. 11 ̶ 13.
  • [11] Kucharski S. and Mróz Z. (2007): Identification of yield stress and plastic hardening parameters from a spherical indentation test. - International Journal of Mechanical Sciences, vol.49, pp.1238-1250.
  • [12] Lin X. and Tzuchiang W. (1992): The interfacial crack between two dissimilar elastic-plastic materials. - Acta Mechanica Sinica, vol.8, No.2.
  • [13] Lin Xia and Wang T. (1993): Singular behavior near the tip of a sharp V-notch in a power law hardening material. - International Journal of Fracture, 59:83-93.
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  • [19] Prager W. (1956): A new method of analyzing stress and strain in work hardening plastic solids. - Journal of Applied Mechanics, vol.23, P.493.
  • [20] Prager W. (1955): The theory of plasticity: a survey of recent achievements. - Proceedings of Institution of Mechanical Engineers, vol.169, pp.41.
  • [21] Ramberg W. and Osgood W.R. (1960): Description of stress-strain curves by three parameters. - NACA TN 902.
  • [22] Rivello R.M. (1960): Ramberg-Osgood and hill parameters of aircraft structural materials at elevated temperatures. - University of Maryland, Aerospace Engineering Department, Rep. 60-61.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-9ce974fb-da01-46d1-b98a-d9ac169042e6
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