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Prevention of manufacturing defects of diamond composite materials by simulating the process at the micro level ABSTRACT. The efficiency of diamond abrasive tools is degraded for several reasons, one of the most significant being the destruction of most of the grains during the process of the manufacture of the tools. This paper presents a methodology for complex research into the destructive stresses in diamond composite tools during manufacture. Analysis of the stress-strain state of the diamond layer was carried out using the finite-element method in applications such as Ansys, CosmosWorks and LS-Dyna. Nanotechnology Perceptions 8 (2012) 171-180Nonsubscribers: purchase individual article

The article presents the results of theoretical studies using finite element modeling, which made it possible to determine the rational characteristics of diamond wheels based on ceramic and polymer bonds. The effect of the parameters of the diamond-bearing layer on the change in its stress-strain state in the process of microcutting of hard alloys and superhard materials has been studied. It is established that the determining factor in the occurrence of critical stresses during grinding is the temperature in the cutting area, the increase of which in the presence of metal phase inclusions in diamond grains with high values of thermal expansion coefficient can lead to destructive stresses in grains and, consequently, their premature destruction. It is advisable to use diamond grains with a minimum content of metal phase and the use in the manufacture of synthetic diamonds solvent metals with a low value of this coefficient, which will significantly increase the use of potentially high resource diamond grains.

Determination of the diamond wheel structure in high-speed grinding using nanoindentation techniques: experimental and numerical simulation ABSTRACT. Grinding at high speeds (over 80 m/s) is a complex process requiring deep understanding for successful deployment. This article describes ways of improving the integrity of the structure of diamond grinding wheels for high-speed regimes using nanoindentation techniques, as well as the prospects for their solution, using mathematical modelling methods.

The results of the development of high-resource ceramic diamond abrasive tool, the design of which was carried out using computer simulation of processes, that accompanying its manufacturing and grinding in the mode of rational self-sharpening, is presented. According to the results of simulation experiments, the composition of the diamond-bearing layer was developed and the instrument with the use of a low-melting ceramic bond with the given properties were made.