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Upon Friction on a Ball Bearing - Outer Raceway Contact - I. Uniform Loading of the Balls
(Universitatea ”Dunărea de Jos” din Galați, 2006)
The paper advances an analytical model to evaluate the effect of micro-slip on the friction losses at the interface of a normally loaded rolling contact. The model validation was done by comparing the theoretical results ...
Hysteresis and Mechanical Fatigue
(Universitatea ”Dunărea de Jos” din Galați, 2006)
The material dumping, known also as inner friction or, simply hysteresis, is considered to be related to energy dissipation in the volume of a macro-continuous medium. This phenomenon takes place when a more or less ...
Viscosity of Amorphous Molecular Substances
(Universitatea ”Dunărea de Jos” din Galați, 2008)
Because the great majority of flow units in a liquid behave instantaneously in a solid-like manner, rheological properties of molecular liquids subjected to high pressures may be measured by using corresponding molecular ...
A Fast Numerical Method to Predict Elastic Fields due to Eigenstrains in an Isotropic Half-Space Part I: Algorithm Overview
(Universitatea ”Dunărea de Jos” din Galați, 2009)
A fast algorithm to predict elastic fields due to arbitrarily shaped eigenstrains in an elastic, isotropic half-space is advanced in this paper. The inclusion domain is partitioned in a set of cuboids of uniform eigenstrains, ...
Upon Radial Fretting of Dissimilar Materials
(Universitatea ”Dunărea de Jos” din Galați, 2006)
The paper presents a state of the art concerning radial fretting for dissimilar bodies and fretting damage. Four simple fretting models are defined in the literature: tangential, radial, rotational and torsional. Only the ...
Singular Points in an Elastic Half-Plane Containing a Circular Hole, Loaded by a Normal Point Force on the Straight Boundary
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
These authors published theoretical results upon the stress state induced in an
elastic half-plane containing a circular hole by a point force applied on its
boundary. The solutions were found in bipolar co-ordinates and ...
Interaction Between Two Unequal Circular Holes Lying in a Sheared Elastic Plane
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
The paper presents an analytic solution for the stress states in an elastic plan
where two unequal circular holes are lying. At infinity, the elastic plane is sheared.
To solve the problem, the authors used bipolar ...
Elastic-Plastic Contact Modeling. Part I: Algorithm Overview and Assessment of Plastic Strain Increment
(UDJG, 2010)
A fast algorithm for elastic-plastic contact simulation is overviewed in this paper. Betti’s reciprocal theorem is employed to assess surface normal displacement and stress state in an elastic half-space in the presence ...
Elastic-Plastic Contact Modeling. Part II: Numerical Simulations and Program Validation
(UDJG, 2010)
Elastic plastic spherical contact is simulated using an algorithm proposed in a companion paper. Materials of contacting bodies are assumed to have different behaviours: rigid (R), elastic (E), elastic-plastic with isotropic ...
Research Issues on Punch - Circular Plate Elastic Contacts
(UDJG, 2010)
Circular plates enter into the category of finite dimension bodies. Solutions regarding the displacements and stresses, which appear at the contact involving finite dimension bodies and also numerical and analytical results ...