High-pressure fluctuation and flow ripple may cause unexpected vibration noise when the piston pump works under severe conditions, eventually lead to hydraulic transmission failure. The geometry of valve plate has a great influence on pressure chamber. In order optimize structure plate, mathematical model considering slot leakage lubricating interfaces was established in this paper. used invest...

the effect of a distributed patch mass on the natural frequency of vibration of a laminated rectangular plate with simply supported boundaries is investigated. the third order displacement field of a composite laminated rectangular plate is defined using the two variable refined plate theory. equations of motion of the plate are obtained with the help of calculus of variation. parametric study ...

INTRODUCTION Throughout the 1980’s extensive studies were undertaken on the measurement of the surf ace charge which accumulates at a gaslspacer interface. In an attempt to quantify such charge, the majority of experimental studies employed small electrostatic field probes to scan across the dielectric surface. Owing to mechanical requirements, each probe consists essentially of a long cylindri...

the isogeometric analysis is increasingly used in various engineering problems. it is based on non-uniform rational b-splines (nurbs) basis function applied for the solution field approximation and the geometry description. one of the major concerns with this method is finding an efficient approach to impose essential boundary conditions, especially for inhomogeneous boundaries. the main contri...

This paper reports on electric field measurements, using the field-induced second harmonic (E-FISH) method, sampling spatial structure and temporal development of DC-driven positive streamer coronas in atmospheric-pressure air at relevant timescales to examine self-pulsating behavior discharge. The discharge is triggered from a point-to-plate geometry consists transient coronas, which bridge in...

Abstract The study experimentally examines the quasi-static shear deformation of a magnetorheological (MR) fluid structured in an external magnetic field. Experiments are carried out using rheometer with plate–plate configuration. working surfaces measuring geometry modified to demonstrate their influence on response field-structured MR fluid. simplest possible suspension microparticles carbony...

superplastic forming (spf) is a manufacturing process utilized in the automotive industry to produce complex geometry aluminum or magnesium alloy components which cannot be fabricated at room temperature. this paper investigates the effects of the die entry radius and the interfacial friction coefficient on the required forming time and thickness distribution of a superplastic formed part. a co...

In this article, results obtained from a preliminary study that contains set of explicit dynamics finite element analyses metal plate bending process are presented through 3D asymmetrical three roller models. ANSYS Ls-Dyna (ED-FEA) preprocessor and solver were used to carry out dynamic simulations. Explicit low-velocity such as the roll-bending is computationally expensive method. Since plastic...

New measurements of photon emission intensities in the decay of U-235 were performed. Source was prepared by deposition of a U-235 solution on glass plate. Standardization was carried out by defined solid angle alpha counting, giving the reference activity with 0.7% relative combined uncertainty. Gamma spectrometry was performed with accurately calibrated high-purity germanium detectors. Correc...

We develop a discretized theory of thermal Casimir interactions to numerically calculate the interactions between fluctuating dielectrics. From a constrained partition function we derive a surface free energy, while handling divergences that depend on system size and discretization. We derive analytic results for parallel plate geometry in order to check the convergence of the numerical methods...