![]() It distributes the applied load and transfers it to the bone, reducing stress-shielding effects and prolong the bone-prosthesis system life span. The numerical result show that the carbon/PEEK composite material (configuration I) seems to be a good solution to increase the values of fatigue safety factor of coating layers due to highest fatigue life and fatigue safety factor. Keywords: Fatigue life estimation Fatigue modeling Polyether ether ketone (PEEK) Strain-life approach Structureproperty relations Thermoplastics. ![]() The carbon/PEEK composite material with 0, +45, -45, and 90 degrees fiber orientation (configuration I) has the highest fatigue life and fatigue safety factor. Results show that the employed model is applicable to capture microstructural effects on fatigue behavior of PEEK. Effect of evaluation interval regardless to material or abutment type totally it. The fatigue safety factor for the coated implant is increased more than 12.73% at least compared to the uncoated implant. RETENTION AND FATIGUE RESISTANCE OF PEEK AND ACETAL THERMOPLASTIC. Fatigue life durations are calculated based on the Goodman mean-stress fatigue theory. For small strains, this strain is proportional 20 2 to the stress and calculable from the appropriate modulus. 40 6 When a material is subjected to stress, an immediate 4 strain occurs. ![]() ![]() The cyclic loads are applied on the prosthesis head. With increasing alignment of the fibres along the loading axis, a noticeable improvement of fatigue strength could be observed, whereas when the fibres were mostly perpendicular, fatigue properties were even lower than those of unreinforced PEEK. 8 application of stress is cyclical, then fatigue must also be considered. A 3D finite element models of hip implants, femur, coating layers with polymeric (PEEK) and composite (carbon/PEEK) coating materials are created for FEA. Experimental results also indicated that the fatigue behavior of PEEK polymer obtained under strain-controlled condition could not be directly correlated to its. Typically PEEK composite materials have been used as a replacement for metallic and ceramic implants, which have a higher modulus of elasticity (Kurtz. This study aims to validate, using finite element analysis (FEA), the design concept by comparing the fatigue behavior of hip implant stems coated with composite (carbon/PEEK) and polymeric (PEEK) coating materials corresponding to different human activities: standing up, normal walking and climbing stairs under dynamic loadings to find out which of all these models have a better performance in the prosthesis-bone systems. Polyetheretherketone (PEEK) is a thermoplastic polymer that was commercialized in the early 1980s and later proposed as a material to be used for medical applications (Panayotov et al., 2016). ![]()
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