arXiv subjects

Octavio Andrés González-Estrada

Publications and source records attributed to Octavio Andrés González-Estrada.

3 recordsLinked to original sources

arXiv2018

Damage detection in a unidimensional truss using the firefly optimization algorithm and finite elements

In this paper, we investigate the damage detection of structures seen as an optimization problem, using modal characterization to evaluate the dynamic response of the structure given a damage model. We implemented the firefly optimization algorithm with a simple numerical damage model to assess the performance of the method and its advantages for structural health monitoring (SHM). We show some implementation details and discuss the obtained results.

cs.CE↗

arXiv2017

Biomechanical analysis of a cranial Patient Specific Implant on the interface with the bone using the Finite Element Method

- New advance technologies based on reverse engineering , design and additive manufacturing, have expanded design capabilities for biomedical applications to include Patient Specific Implants (PSI). This change in design paradigms needs advanced tools to assess the mechanical performance of the product, and simulate the impact on the patient. In this work, we perform a structural analysis on the interface of a cranial PSI under static loading conditions. Based on those simulations, we have identified the regions with high stress and strain and checked the failure criteria both in the implant and the skull. We evaluate the quality of the design of the implant and determine their response given different materials, in order to ensure optimality of the final product to be manufactured .

physics.med-ph↗

arXiv2017

Evaluation of the tribological properties of metal matrix composite materials (MMCs) obtained by additive manufacturing using selective laser melting (SLM)

The mechanical and tribological properties of steel matrix composites (316L stainless steel reinforced with Cr3C2 ceramic particles) were investigated. The steel matrix composites (SMC) with three reinforcing percentages (3, 6, and 9 wt.%) were manufactured by Additive Manufacturing technologies (SLM: Selective Laser Melting). The wear behaviour was studied by using a pin-on-disk wear test at room temperature. The worn surface was analysed using Scanning Electron Microscopy (SEM). The results indicated that the friction coefficient does not have a clear tendency or direct correlation with the reinforcement variation while the wear rate decreases with increasing content of reinforcement. The better properties combination were achieved with 6 wt.% of reinforcement.

physics.app-ph↗