Estimation of Young’s Modulus of the Porous Titanium Alloy with the Use of Fem Package

Abstract

Porous structures made of metal or biopolymers with a structure similar in shape and mechanical properties to human bone can easily be produced by stereolithographic techniques, e.g. selective laser melting (SLM). Numerical methods, like Finite Element Method (FEM) have great potential in testing new scaffold designs, according to their mechanical properties before manufacturing, i.e. strength or stiffness. An example of such designs are scaffolds used in biomedical applications, like in orthopedics' and mechanical properties of these structures should meet specific requirements. This paper shows how mechanical properties of proposed scaffolds can be estimated with regard to total porosity and pore shape.

Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants

“…The mono-material Ti6Al4V structures were modelled as a linear elastic material (Ti6Al4V) with an elastic modulus of 110 GPa, a Poisson's ratio of 0.34 and density of 4500 kg/m³ [11,36]. The multi-material Ti6Al4V-PEEK structures were modelled, also, as a linear elastic material considering an elastic modulus of 3.76 GPa, a Poisson's ratio of 0.38 and a density of 1300 kg/m³ as PEEK properties [37].…”

A Review on Development of Bio-Inspired Implants Using 3D Printing

“…In a 2015 study by G. Rotta et al, it was demonstrated that SLM-printed porous Ti-6Al-4V had an 85% reduction in elastic modulus. The conventional alloy had a modulus of 110 GPa, while the 3D-printed porous Ti-6Al-4V showed a range of 17–49 GPa, which stands closer to actual human bone, varying from 0.15 to 18.1 GPa [ 127 ]. A study by Hasan et al suggests that shell thickness and porosity parameters for AM is also an important aspect for ensuring adequate mechanical properties [ 128 ].…”

“…In earlier days, bone defects were repaired using autografting from the cranium, tibia, rib, scapula, sternum, fascia, or ileum were used [ 126 ]. In later approaches, allografts (of cadaveric origin) and xenografts from animals were used for cranioplasty [ 127 , 128 ]. However, maintenance, revision surgery, and graft rejection are some of the problems with the above techniques [ 126 ].…”

Selective Laser Melting of Ti6Al4V sub-millimetric cellular structures: Prediction of dimensional deviations and mechanical performance

“…Simplified models were considered for each structure typology and finite element meshes were generated using tetrahedral elements. The material of the structures was defined as linear elastic, Ti6Al4V with an elastic modulus of 110 GPa, a Poisson's ratio of 0.30 and density of 4500 kg/m 3 (Chen and Thouas, 2015;Rotta and Seramak, 2015). A load (F) was applied on the upper surface of the model and the elastic modulus (E) was estimated using the following expression:…”