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RISStructural Systems for Elevated Temperatures and Hostile Environments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The demand on load-carrying structural systems for increased operating temperatures in hostile environments has led to the development of new metallic alloys and non-metallic materials. Because ...
A Direct Method for the Shakedown Analysis of Structures Under Sustained and Cyclic Loads
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a straightforward method for the direct determination of the steady solutions in shakedown analysis. The direct method was first proposed by Zarka et al. This paper simplifies ...
Constitutive Relationships for the Time-Dependent Deformation of Metals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper discusses the constitutive relations for the inelastic deformation of a polycrystalline metal at high temperature. Commencing from a description of a dislocation structure in terms of ...
Deformation Bounds for Bodies in a State of Creep
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Bounds on the energy dissipation and surface displacements are found for bodies undergoing nonlinear creep as a result of step loading. Elastic effects are included in a simple manner, and it ...
Deformation Bounds for Bodies Which Creep in the Plastic Range
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous results on bounding the energy dissipation of bodies which creep have been extended to include plastic deformations. The theorems, which are derived, show that previous results can be ...
Deformation Bounds for Cyclically Loaded Shell Structures Operating Under Creep Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Constitutive relations, based on the Bailey-Orowan’s creep theory, are used to develop a maximum work condition which includes the influence of an internal state. A bounding theorem on displacement ...
Representation of Mechanical Behavior in the Presence of Changing Internal Structure
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper is concerned with the representation of the relationship that exists, for a given material and temperature and for small deformations, between histories of applied stress and the ...
The Application of Energy Theorems to Bodies Which Creep in the Plastic Range
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In a previous paper [4] displacement and deformation bounds were derived for a body composed of a creeping/plastic material. In this paper, plastic limit state solutions are used in conjunction ...
Shakedown as a Guide to the Design of Pressure Vessels
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Using the theorems of plasticity lower bound estimates of shakedown loadings have been calculated for a number of shell-like structures commonly found in the pressure vessel industry. These have ...
A Method for Estimating Creep Deformation of Structures Subjected to Cyclic Loading
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A method is proposed for estimating structural creep deformation due to histories of cyclic proportional loading. The method applies to structures composed of materials whose creep strain due ...