Abstract
The paper deals with investigation on directional variations of mechanical response in 3D printed models of human trabecular bone. Sample of trabecular bone tissue was resected from human donor and 3D model was obtained by X-ray computed tomography. Then a series of cubical samples was prepared by additive manufacturing technique and tested by uniaxial compression loading mode. Mechanical response was compared in nine different combinations of direction of 3D printing and loading direction. The results show neglectible influence on the deformation response in elastic region (stiffness) and significant changes of the behaviour in plastic region (stress and strain at yield point, strain at full collapse).
Highlights
In the regenerative medicine bone scaffolds serve to support the bone healing process [1, 2]
Direction of the 3D printing related to the loading direction may influence the effective mechanical properties and affect the reliability of such analyses
In order to investigate the influence of the printing direction a series of uniaxial loading tests was performed on additively manufactured models of the human trabecular bone
Summary
In the regenerative medicine bone scaffolds serve to support the bone healing process [1, 2]. Additive manufacturing provides possibilities for manufacturing of the scaffold structure with tailored properties. Mechanical response and topological properties of additively manufactured stuctures may be investigated and optimised using experimental modeling [3, 4]. Direction of the 3D printing related to the loading direction may influence the effective mechanical properties and affect the reliability of such analyses. In order to investigate the influence of the printing direction a series of uniaxial loading tests was performed on additively manufactured models of the human trabecular bone
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