Abstract
Knowing how to deform the Turcite thermoplastic material under the action of conical penetrators is a means of obtaining information on the processing of the counterpart (made from a metal material with higher hardness) with which it comes into contact.The paper aims to theoretically determine the depth of penetration of the thermoplastic material under the action of some conical penetrators and to establish the coefficient of static and kinetic friction under the action of these penetrators. The proposed model will be validated experimentally on a tribological stand made for this purpose.
Highlights
From the analysis of the theoretical model it is found that the penetration depth of the thermoplastic material is dependent on the characteristics of the material and the penetrator halfangle
The difference between the theoretical and experimental penetration depth values is noticeable only for the small semi angles of the penetrator, this can be explained by the elasticity properties of the material, assuming that the friction is absent at the moment of penetration
The couple of materials chosen for the bearing and its way of processing have a decisive role in the smooth functioning of the coupling in terms of wear
Summary
The friction couplings used in technical applications use a variety of materials that must fit mechanically, thermally, and chemically during operation.In technical applications, the characterization of materials in terms of compatibility of the coefficients of friction or the properties of resistance to deformation and scratching are some of the indicators to be considered when choosing the materials of the friction torque.The Various studies on this topic [1,2,3,4,5,6,7,8,9,10,11] illustrate that polymeric (thermoplastic) materials have a wide range of scratch deformation characteristics under the action of conical penetrators, compared to metallic or ceramic materials.Because the nature of material deformation in any actual deterioration process depends on several contact variables (shape and size of roughness, normal load, sliding speed), a model for deterministic investigation was proposed, varying only some of the geometric parameters of a penetrable conical shape (from - a harder material - cast iron) in contact with a polymeric composite material.Theoretical model In the vast field of mechanical demands that any thermoplastic material can withstand, the scratching phenomenon is one of the most important. The characterization of materials in terms of compatibility of the coefficients of friction or the properties of resistance to deformation and scratching are some of the indicators to be considered when choosing the materials of the friction torque. The Various studies on this topic [1,2,3,4,5,6,7,8,9,10,11] illustrate that polymeric (thermoplastic) materials have a wide range of scratch deformation characteristics under the action of conical penetrators, compared to metallic or ceramic materials. The way the material deforms under the action of a sliding cone-shaped penetrator is considered a characteristic of the material
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