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Ocena tarcia i zacierania w warunkach modelowania fizycznego

Presz W., Muster A.

Przegląd Mechaniczny

2003

nr 12

25-28

The test stand for drawing of rectangular model wax-based soft material specimens with cylindrical punch has been developed. Different speeds of motion of cylindrical punch are possible. Data ac-quisition system makes possible recording of sliding force of punch and sliding distance. Force versus sliding distance curve and process efficiency has been used for evaluation of lubricant for physical modelling processes.

Establishment of a new class of wear: adhesion initiated catastrophic wear

Markov D., Kelly D.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, no 3

887-901

The nucleation mechanisms and early stages of four types of catastrophic wear (cw), which can be identified as adhesion-initiated (ai) are considered. Close connections are established: a) between two low-energy types of AICW and a disclination mode of plastic deformation and between two high-energy types of AICW and an amorphous mode of plastic deformation, b) between the incidence of either type of low-energy aicw and the hardness of an AICW seed domain relative to that of the friction surfaces, and c) between the onset of AICW and a competitive stripping and reformation of interlayers. Hypothesis on generation and transfer of energy and heat at microlevel (in process of movement of dislocations and disclinations) is developed as a base of amorphous deformation. Attention is drawn to a need for further consideration of terminology in this field.