Universal Journal of Mechanical Engineering Vol. 2(2), pp. 44 - 48
DOI: 10.13189/ujme.2014.020202
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Effect of Material Damage on Autofrettage of Thick-Walled Cylinder


Gennadiy Lvov , Olga Kostromitskaya *
Department of Dynamics and Strength of Machines, Kharkov Polytechnic University, Kharkov, 61002, Ukraine

ABSTRACT

Continuum damage mechanics approach has been used for analysis of the autofrettage process. General set of government equations of elastic-plastic bodies is derived by using the effective stress concept. Strain – damage coupling constitutive equations are developed on the base of plasticity relationships with bilinear kinematic hardening and kinetic law of ductile damage evolution. Damage of the material leads to decrease of Young’s modulus after plastic deforming that affects on the unloading stage of autofrettage. Influence of material damage on residual hoop stress was considered by the example of autofrettaged thick-walled cylinder. Numerical results were obtained by finite-element method for plane-strain case. These results showed that material damage modifies the residual stress distributions and reduced residual hoop stress value on bore area.

KEYWORDS
Autofrettage, Damage, Residual Stresses, Thick-Walled Cylinder

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Gennadiy Lvov , Olga Kostromitskaya , "Effect of Material Damage on Autofrettage of Thick-Walled Cylinder," Universal Journal of Mechanical Engineering, Vol. 2, No. 2, pp. 44 - 48, 2014. DOI: 10.13189/ujme.2014.020202.

(b). APA Format:
Gennadiy Lvov , Olga Kostromitskaya , (2014). Effect of Material Damage on Autofrettage of Thick-Walled Cylinder. Universal Journal of Mechanical Engineering, 2(2), 44 - 48. DOI: 10.13189/ujme.2014.020202.