Short Communication
Mechanics of Solids

Creep process simulation considering pre-destruction stage and model identification

K. A. Agakhi, Yu. G. Basalov, V. N. Kuznetsov, L. V. Fomin

Laboratory of Durability and Creep at Heats, Research Institute of Mechanics, M. V. Lomonosov Moscow State University, Moscow

Abstract: It was suggested to define Rabotnov's function (damage function) from the differential equation of the first order for simulation of a pre-destruction stage in creep process. In this paper, the damage function is for the first time determined directly from a series of creep tests, independently of the formulated differential equation which, generally speaking, does not concord with the experimental data. A non-linear model of the creep process is suggested taking into consideration the rate increase stage, using an integral operator as Lebega's norm, and containing a damage function determined experimentally.

Keywords: creep, damage function, modeling, experiment, identification, generalized model, integral operator, norm of Lebeg.

UDC: 539.376

MSC: 74C05

Original article submitted 20/VII/2009
revision submitted – 09/IX/2009

DOI: 10.14498/vsgtu711

Bibliographic databases:

• 
• 
•