THE TRUSS OVERLOAD ANALYSIS UNDER CORROSIVE DEGRADATION

Abstract

A contribution to analytical and numerical tools is presented that permits deterministic evaluation of structures’ behavior under multiparameter and/or cyclic mechanical, thermal and chemical loads. Particular structure elements undergo plastic and corrosive degradation and dissipate energy, which consists of irreversible contributions, like the work of inelastic strains. The construction and its units’ lifetime are estimated according to the dissipated energy criterion. Modeling and numerical implementation of degradation effects are discussed, including cyclic plasticity generated by mechanical and thermal loads, stress corrosion, electrochemical corrosion and low-cyclic corrosion.

Keywords

• cycle loading
• corrosion degradation
• numerical symulator
• FEM