Abstract
This study presents a model for Ti6Al4V alloy produced by applying electron beam melting as continuum media with orthotropic elastic and plastic properties and its application in total hip replacement (THR). The model exhibits three Young’s moduli, three shear moduli, and three Poisson’s ratios as elastic properties and six coefficients describing the Hill yield criterion. Several uniaxial tension and torsion experiments and subsequent data processing were performed to evaluate the properties and coefficients. The typical values obtained for Young’s moduli, shear moduli, and Poisson’s ratio were 121–124 MPa, 37–42 MPa, and 0.25–0.26, respectively. A comparison of the experimental tension and torsion curves with those obtained by a finite element analysis revealed a good correlation with a maximum error of 9.5%. The finite element simulation of a personalised pelvic implant for THR manufactured from the obtained material proved the mechanical capability of the implant to successfully withstand the applied loads.
Highlights
Additive manufacturing is an advanced manufacturing technology that is rapidly gaining acceptance worldwide in recent times.Additive technologies are finding an increasing number of applications, as they facilitate manufacturing products that are impossible or impractical to produce by using other methods owing to economic reasons
Because this study is devoted to the construction of a mathematical model of Ti6Al4V alloy produced on electron beam melting (EBM) machines, as well as to the subsequent utilisation of this model for finite element analysis (FEA) simulations of personalised endoprosthesis, a brief discussion of how this technology works is given as follows
A comparison of these two materials in terms of microstructure and orthotropic properties revealed that aluminium exhibited more pronounced orthotropic properties than titanium
Summary
Additive manufacturing is an advanced manufacturing technology that is rapidly gaining acceptance worldwide in recent times. Additive technologies are finding an increasing number of applications, as they facilitate manufacturing products that are impossible or impractical to produce by using other methods owing to economic reasons. Growing production capabilities compel the markets to implement additive manufacturing as efficiently as possible to manufacture competitive products. It is postulated that superior products must possess optimal characteristics at each product life step, from development to manufacturing. This paper describes a method for the construction of material models for parts typically produced by applying metal powder melting or sintering using layer-by-layer material techniques. The proposed method can obtain material models for further use in finite element simulations
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