Wear Research and Finite Element Analysis of Feldspar Ceramics.

Feldspar ceramic materials are widely used as dental ceramic materials in the field of dental prosthetics. Studying their wear mechanisms is of great significance for the evaluation and prediction of dental ceramic life. This paper studies the wear mechanisms of feldspar ceramic materials from the aspects of wear performance experiments and finite element analysis. The high speed ring block friction and wear tester were used to conduct 3.5 x 10⁵ times wear tests on the Sirona CEREC Blocks feldspathic ceramic block under the load of 10, 20, 30 N and 40 N. The changes of wear quality, wear rate, etc. with respect to load and wear times were obtained. According to the change curve, the wear process of feldspathic ceramics was divided into three stages and the wear surface morphology of each stage was observed. The Archard wear model was modified and improved, and based on this, the finite element simulation research was carried out through the UMESHMOTION subroutine in ABAQUS. Two node paths were selected to conduct simulation analysis on the adaptive mesh area of ALE for wear under four load sizes and 3.Ox 105 wear cycles. Compared with the experimental wear depths, the maximum error under 10N load was 12.18%, and the minimum error under 30 N load was 8.64%. [ABSTRACT FROM AUTHOR]