Digital Tools for Statistical Quality Management in Automobile Production

Russian Engineering Research - Digital tools for managing improvements in automobile production are developed. An operative tool provides warnings regarding the operational quality of the vehicles...     

Key Aspects of the Digitization of Quality Control in Auto Assembly

Russian Engineering Research - A digital system for quality management in auto assembly is outlined. An approach is proposed for selecting the key operations requiring the introduction of a smart...     

Sintering of dispersed tantalum powders

Translated from Poroshkovaya Metallurgiya, No. 12 (360), pp. 11–16, December, 1992.     

On the problem of a yield tooth

The model of a simultaneous nucleation and motion of several dislocation lines on a simulation area with obstacles (defects) located randomly thereon is briefly described. We present the algorithm of constructing a “stress-relative strain” dependence upon tension of samples at a specified constant strain rate. From the results of experiments performed using the mathematical model, the dependence of the “yield tooth” on the initial dislocation density and strain rate is shown.     

Indices for Digital Quality Management at Auto Plants

Russian Engineering Research - An approach is outlined to determining the basic indices for monitoring the operational quality of automobiles. That is the basis for creating digital quality...     

An increase in the rate of plastic deformation under the effect of ultrasound

The multiplication of dislocations by a Frank-Read source upon a simultaneous effect of constant and harmonic components of external stress has been studied using computer-aided mathematical simulation (the harmonic component of the stress was by an order of magnitude less than the constant component.) It has been found that the number of dislocation loops that have been formed in a time unit depends on the frequency of the harmonic component. A maximum was observed at ultrasonic frequencies. The number of the loops generated can increase by several times. It has been shown that the appearance of a maximum is caused by the fact that the time of loop formation corresponds to the period of ultrasonic oscillations. On this ground, we propose an explanation to the phenomenon of ultrasound-induced plasticization known in the physics of plasticity.