MONITORING OF CRITICAL LENGTH OF CRACK-LIKE DEFECTS IN THE PLATE BONE CEMENT BECAUSE OF THEIR DIFFERENT GEOMETRY

摘要

The article deals with structural elements of materials made of bone cement coupons of various impurities: diethylaminoethylacrylate, dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate. Considering the stress intensity factor the characteristics of fracture factors with different soaking time intervals in simulated body fluid (0; 3; 6 months) and also with different impurities in fixed material (2... 10 wt%) are presented. The data for the stress intensity factor used in the constructed models for different structural elements, allowing us to analyze the possible risk of such elements, provided that they contain crack-likes defect are given. Also the values of the critical length of each considered crack-like defect and calculated number of loading cycles in this object, that can be useful for engineering recommendations for the test material and concrete structural elements made from this material, are obtained.