CONSIDERATIONS CONCERNING YIELD CRITERIA INSENSITIVE TO HYDROSTATIC PRESSURE
Journal Title: ROMANIAN JOURNAL OF TECHNICAL SCIENCES - APPLIED MECHANICS - Year 2018, Vol 63, Issue 2
Abstract
For distinguishing between pressure insensitive and pressure sensitive criteria, the form of yield surface with invariants is preferred. It is known that when this function can be formulated only in terms of the stress deviator invariants, it describes a pressure-insensitive material behaviour. But expression of criteria in terms of invariants may be a difficult goal in some particular cases. In the present paper is mathematically demonstrated that all criteria developed for standard plastic materials, in other words homogeneous, isotropic, ductile (without so-called strength differential or SD effect) materials, loaded in plane state of stress (2D space), are insensitive to hydrostatic pressure.
Authors and Affiliations
ADRIAN SANDOVICI, PAUL-DORU BARSANESCU
Keywords
Related Articles
- EP ID EP513294
- DOI -
- Views 51
- Downloads 0
CALCULUS OF THE TORSOR OF INERTIA FORCES FOR A RIGID SOLID BODY IN GENERAL MOTION
The calculus of the torsor of the inertia forces for a rigid solid body in general motion is a very important matter for its next dynamic study. In other words if we aim to perform the dynamic survey of a rigid solid bod...
DYNAMICS OF THE HEXAPOD PARALLEL ROBOT
Recursive matrix relations in kinematics and dynamics of the Hexapod parallel robot are established in this paper. Controlled by six forces, the parallel manipulator prototype is a space six-degrees-of-freedom mechanical...
AXIAL IMPACT OF OPEN-SECTION TWCF COLUMNS – EXPERIMENTAL STUDY
The paper is devoted to the results of experimental study into the crushing behaviour of TWCF open section columns subjected to axial impact. Steel channel and top-hat section was under investigation. The paper contains...
AN ANALYSIS OF THE STORM DYNAMICS IN THE BLACK SEA
The main objective of the present work is to analyze the storm dynamics in the Black Sea. A numerical wave model has been implemented and validated in the entire sea basin, including also the Sea of Azov. The wave model...
THE MECHANISM OF THE PROSTHESIS FOR UPPER HUMAN LIMB – MAIN ASPECTS REGARDING: SINTHESIS, ANALYSIS, DESIGN AND FUNCTIONAL SIMULATION
This paper describes the main stages of structural and cinematic synthesis and analysis, design and functional simulation regarding the mechanism of the human hand prosthesis. For the structural scheme, one uses three pi...