The effect of boundary conditions on the vibrations variable stiffness composite laminates (VSCL) with curvilinear fibers is particularly interesting because fiber orientations at plate edges and in plate’s domain can differ. Since real boundaries are not ideal limit cases usually assumed literature, a more correct model be achieved by representing as elastically restrained edges. This approach...

Vibrations of rotor systems are largely determined by elastic characteristics supports. In the general case, dependence displacements on force for such supports is nonlinear. This applies to bearing various types. addition bearings, elements also used in systems. They designed change overall stiffness The paper analyzes radial flexible ring dampers For this, two main approaches proposed. first ...

To study the laws of evolution dynamic increase factors (DIFs), relationship between DIFs and progressive collapse resisting capacity a structure with web cleat joints under column removal scenario, refined finite element model is established based on an existing quasi-static test. The are studied for different loading type, beam height, joint rotation stiffness. It was observed that displaceme...

Spring meshes have been used to model elastic material in computer graphics, with skin, textiles, and soft tissue being typical applications. A spring mesh is a system of vertices and edges, possibly with highly irregular geometry, in which each edge is a spring, and springs are connected by \pin-joints" (\gimbal-joints" in 3D) at the vertices. This method is computationally attractive, compare...

This paper presents an aerial manipulation robot consisting of a hexa-rotor equipped with 2-DOF (degree freedom) Cartesian base (XY–axes) that supports 1-DOF compliant joint arm integrates gripper and elastic linear force sensor. The proposed kinematic configuration improves the positioning accuracy end effector respect to robotic arms revolute joints, where each coordinate position depends on ...

The paper presents a methodology to enhance the stiffness analysis of serial and parallel manipulators with passive joints. It directly takes into account the loading influence on the manipulator configuration and, consequently, on its Jacobians and Hessians. The main contributions of this paper are the introduction of a non-linear stiffness model for the manipulators with passive joints, a rel...

Nowadays, mechanical designers and engineers of elastic structures at ultra-small scales face an interesting challenge; traditional flexures with several components, mechanical joints/ welds and linkages are almost impossible to manufacture with existing microsystem fabrica‐ tion technologies. Therefore, the majority of mechanical components, elements and building blocks are based on micro/nano...

Fatigue analysis of aluminum-alloy welded joints based on the linear elastic notch-stress approach is presented in this paper. The International Institute Welding proposes two variants approach, one for thick joints, i.e., with a plate thickness 5 mm or more, reference radius rref = 1 mm, using FAT71 design curve, and thin less than 0.05 FAT180 curve. In work, feasibility proposed S–N curves, o...