Monitoring of the Critical Length of Cracklike Defects in the Bone-Cement Plate with Regard for their Different Geometry

We study the structural elements of materials made of bone-cement coupons with various impurities: diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, and diethylaminoethyl methacrylate. With regard for values of the stress intensity factor, we present the characteristics of fracture factors for different times of soaking in simulated body fluid (0; 3; and 6 months) and also for different amounts of impurities in the analyzed material (2–10 wt.%). The data on the stress intensity factors used in the constructed models for different structural elements enable us to analyze possible risks of fracture of these elements in the case where they contain cracklike defects. Moreover, we obtain the values of the critical length of each considered cracklike defect and compute the number of loading cycles in this object that can be useful for the engineering recommendations concerning the tested material and specific structural elements made of this material.