6 documents found, page 1 of 1
A finite element model of a 3D dry revolute joint incorporated in a multibody d...
Isaac, Fernando; Marques, Filipe; Dourado, N.; Flores, PauloIn this work a new approach to deal with non-ideal operative aspects of spatial revolute joints by means of a three-dimensional finite element analysis (3D-FEA) is pre- sented. The developed model incorporates the inertia of the joint components and the cor- responding material properties. The fact that actual joint mechanical components present dimensional and geometrical deviations resulting from the assembly ...
A study on the dynamics of a study on the dynamics of spatial mechanisms with f...
Marques, Pedro Filipe Lima; Isaac, Fernando; Dourado, Nuno; Souto, A. Pedro; Flores, Paulo; Lankarani, Hamid M.An investigation on the dynamic modeling and analysis of spatial mechanisms with spherical clearance joints including friction is presented. For this purpose, the ball and the socket which compose a spherical joint are modeled as two individual colliding components. The normal contact-impact forces that develop at the spherical clearance joint are determined by using a continuous force model. A continuous analy...
An enhanced formulation to model spatial revolute joints with radial and axial ...
Marques, Filipe; Isaac, Fernando; Dourado, Nuno; Flores, PauloThe primary objective of this work is to present a new formulation to model spatial revolute joints with radial and axial clearances. The methodology developed is based on the relative motion between the journal and bearing elements, which accounts for all the possible contact scenarios within a revolute clearance joint. In this process, normal and tangential contact force models are reexamined to evaluate thei...
3D formulation for revolute clearance joints
Marques, Pedro Filipe Lima; Isaac, Fernando; Dourado, Nuno; Flores, PauloIn this work, a general and comprehensive methodology for the modeling and analysis of spatial multibody systems with revolute clearance joints is presented. The proposed formulation considers the journal and the bearing elements as two cylindrical colliding bodies. All the potential contact scenarios and their kinematics are determined from the relative positions of two cylinders and from the kinematics of the...
Recent developments on cylindrical contact force models with realistic properties
Isaac, Fernando; Marques, Pedro Filipe Lima; Dourado, Nuno; Flores, PauloIn this work a numerical study was performed involving a spatial revolute joint formed by a journal and a bearing with the purpose to evaluate the effect of the bearing thickness, misalignment and impact velocity on the force generated in the contact process. These analyses were run in a developed three-dimensional finite element model that simulates the referred aspects in a realistic way. This numerical tool ...
Spatial revolute joints with clearance and friction for dynamic analysis of mul...
Marques, Pedro Filipe Lima; Rychecký, Drahomír; Isaac, Fernando; Hajžman, Michal; Polach, Pavel; Flores, PauloA study on the effects of dry spatial revolute joints with clearance and friction is delivered through this work. Both radial and axial clearances are taken into consideration which makes the model more realistic for three-dimensional motion. The kinematics of the contact between the journal and bearing are assessed, and used to evaluate the intra-joint normal and tangential contact forces. Moreover, a spatial ...