Geodesic
Structural Model of Material Softening at Creep under Complex Stress Conditions
Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences, no. 1 (2009), pp. 75-84

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The process of softening and destructions of material is investigated at creep under complex tense state conditions on the basis of a structural model. Energy criterion of local element destruction is presented. Comparative analysis is performed of structural model calculation data and experimental data on the protracted durability for thin-shelled tubular steel standards 12X18H10T at $T=850\,^\circ \rm C$ for the followings types of tense state: tension, twisting and tension, intrinsic pressure and tension. Calculation results are compared with analogical data of the existing phenomenological creep and protracted durability models.
Keywords: creep, structural model, combined stress conditions, material softening, material destruction, stress-rupture strength. 
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     title = {Structural {Model} of {Material} {Softening} at {Creep} under {Complex} {Stress} {Conditions}},
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V. P. Radchenko; E. V. Nebogina; E. A. Andreeva. Structural Model of Material Softening at Creep under Complex Stress Conditions. Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences, no. 1 (2009), pp. 75-84. http://geodesic.mathdoc.fr/item/VSGTU_2009_1_a8/