Introduction The Chemical Mechanical Planarization (CMP) process plays a key role in the manufacture of data storage, video display panels, and semiconductor chips. The process combines the chemical (acidic or basic) effect of the slurry, which contains micro-abrasives with the mechanical effect provided by polishing to reduce the topography on the wafer or rigid disk substrate. The process for...

A diffractive imaging system consisting of two satellites is analyzed in view dynamics. The mathematical model rigid and flexion couples studied to describe the relative motion satellites. Based on an integrated dynamics with dual quaternion, a fixed-time non-singular terminal sliding mode controller designed meet requirements Earth observation. Finally, introducing as control group, comparativ...

To understand the fluid dynamics of a biologically inspired unsteady low-aspect-ratio propulsor, unsteady pressure distributions were measured and compared with time-averaged thrust performance and wake visualizations. The experiments were performed on rigid rectangular panels with different aspect ratios, pitching in a uniform flow. Panel aspect ratio and pitching amplitude were shown to affec...

We present two geometric descriptions of the frictional properties of a rigid body sliding on a planar surface. The limit surface LS, from classical plasticity theory, is the boundary of the set of all possible frictional forces and moments that can be sustained by the frictional interface. Zhukovskii’s moment finction is the frictional moment as a function of the instantaneous center of rotati...

We study the peeling process of a thin viscoelastic tape from rigid substrate. Two different boundary conditions are considered at interface between and substrate: stuck adhesion, relative sliding in presence frictional shear stress. In case perfectly sticking interfaces, we found that behavior resembles classical Kendall elastic tapes, with modulus given by high-frequency modulus. Including ef...

New porous biomaterials based on hydroxyapatite (HAp) were designed as obturation materials for dental cavities. Synthetic HAp powder with a particle diameter of 150 m was agglutinated using three different polyurethane monocomponents (rigid, semi-rigid, and flexible), enabling the matching of their properties to those of real teeth. Alumina particles were also added in some cases. Our new hybr...

Abstract-We analyze a three-dimensional frictional contact problem between a homogeneous and isotropic linear elastic body and a substrate consisting of a homogeneous and isotropic linear elastic half-space coated with a transversely isotropic elastic layer. The problem formulation includes the kinematics of the body, including its rolling/sliding on the substrate. Expressions relating the disp...

We consider a PDE-ODE model of flexible satellite that is composed two identical solar panels and center rigid body. prove the exponentially stable in sense energy solutions decays to zero exponentially. In addition, we construct internal based controllers, passive controller an observer controller, such linear angular velocities body converge given sinusoidal signals asymptotically. A numerica...