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 52
- Downloads 0
GAS TURBINE AS RANGE EXTENDER FOR FUTURE ELECTRIC AUTOMOBILES
The propulsion of automobiles by motors, especially by hub motors, integrated into the wheels, offers remarkable advantages in terms of vehicle dynamics, stability and freedom of movement. But the most important benefit...
LIMIT STRAINS VARIABILITY WITH RESPECT TO MATERIAL SCATTER
In this paper a study regarding to the effect of the variability of the mechanical parameters on the prediction of the limit strain have been presented. The necking criterion used in the analyses is the one proposed by M...
HOT AIR ENGINE, DEVELOPED AND PATENTED BY TRAIAN VUIA, A ROMANIAN PERFORMANCE FOR 21st CENTURY
After thoroughly researching data from national archives, libraries, and important technical studies from Romania and abroad, I concluded that the hot air and closed-circuit engine built, tested, and patented by Romanian...
DYNAMICS MODELLING OF A PARALLEL FLIGHT SIMULATOR
Recursive matrix relations for dynamics analysis of a parallel manipulator, namely the spatial flight simulator, is established in this paper. Knowing the general motion of the platform, the inverse dynamics problem is s...
GIANT RESPONSE OF MICROBUBBLE CONTRAST AGENTS OSCILLATION IN A HIGH-INTENSITY FOCUSED ULTRASOUND FIELD
The interaction of microbubble contrast agents (BR14) with high-intensity focused ultrasound is investigated by high-speed photography. The experiments were conducted at an ultrasound frequency of 1.08 MHz with a peak ne...