Abstract
Carbon fiber reinforced polymer (CFRP) have been gaining prominence in replacing metallic alloys for infrastructure in prostheses, with the possibility of edentulous patients to acquire fixed prostheses. For this, procedures are required to connect these implants to the implant-supported fixed prosthesis, such as holes and notches that can reduce their mechanical properties. In addition, the infrastructure requires longer cantilevers, causing greater stress on the prosthetic system. Then, the objective is to analyze the stress concentration in the CFRP subjected to bending loads with holes (4 and 6 mm diameter to verify the influence of the diameter-to-width ratio) in four-point-bending test. Two composite laminates were evaluated: one with thermoplastic matrix of poly(phenylene sulphide) PPS; and another with epoxy matrix combined with carbon fibers fabric. The presence of holes in the studied dimensions did not present significant differences in the flexural modulus and maximum bending strength. Therefore, the use of CFRP showed some advantage regarding the reduced effect of stress concentration compared to metallic alloys.
Highlights
Lightweight materials with high mechanical properties such as carbon fiber reinforced polymer have been the subject of research in several fields such as transportation, energy, sporting goods, and medical[1,2,3,4]
Carbon fiber reinforced polymer (CFRP) has been clinically tested and its biocompatibility properties are recognized compared with titanium alloys[8], providing osseointegration in the case of thermoset/carbon fiber composites[9], with the advantage of having similar density to human bone[10]
The Carbon/PPS composite specimens had a high scatter during the loading process that is related to the variation in the damage processes, which led to a major failure in buckling at the outer fiber in compression side of the bar, where a continuous laminate is more prone to fail[61]
Summary
Lightweight materials with high mechanical properties such as carbon fiber reinforced polymer have been the subject of research in several fields such as transportation, energy, sporting goods, and medical[1,2,3,4]. The latter, in the context of prosthesis material, cares of patient welfare that includes the durability under cyclic loading, biocompatibility, and lightweight for mobility[5,6]. Dental prosthesis often needs high strength infrastructure in order to preventing complications such as fractures This type of application, it requires that the
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