A predictive failure framework for brittle porous materials via machine learning and geometric matching methods  Alp Karakoç1, Özgür Keleş2,* 1Aalto University, Department of Bioproducts and Biosystems, Vuorimiehentie 1, Espoo, Finland 2San Jose State University, Chemical and Materials Engineering Department, One Washington Square, San Jose, CA 95192, USA https://link.springer.com/article/10.1007/s10853-019-04339-1 ABSTRACT Brittle porous materials are used in […]

J.R. Seibert, O. Keles, J. Wang, F. Erogbogbo, Data on Thermal Conductivity and Dynamic Mechanical Properties of Graphene Quantum dots in epoxy, Data in Brief,  https://doi.org/10.1016/j.dib.2019.105008. Fig. 2. TEM images of bird charcoal at 2500x (A) and at 50000x (B), and GQDs at 50000x (C) and 500000x (D) GQDs are indicated by the red circles. […]

“Multi-Scale Structure Control for Advanced Functional Materials” Ozgur Keles, Ph.D.Assistant ProfessorChemical and Materials Engineering DepartmentSan Jose State University Thursday, December 5, 20194:00 PMTien Room, 6101 Etcheverry Hall  ABSTRACTEconomic growth demands better products; hence, better materials. Specifically, product space in energy, defense, aerospace, and automotive industries requires materials that are multi-functional, lightweight, reliable, and tough. In addition, environmental regulations […]

Joel R Seibert, Ozgur Keles, Jun Wang, and Folarin Erogbogbo, “Infusion of Graphene Quantum Dots to Modulate Thermal Conductivity and Dynamic Mechanical Properties of Polymers,” Polymer, Accepted.  https://www.sciencedirect.com/science/article/pii/S0032386119309954?via%3Dihub Abstract  Graphene quantum dots are small fragments of graphene that may be advantageous to transferring properties to polymers because of their small size, molecular like interactions, surface […]

We will be installing a new EOS M 100 metal additive manufacturing system. Our research is targeting unexplored hierarchical structural spaces that can be achieved using the unique capabilities of the selective laser melting system. I would like to thank my co-PIs, collaborators, NSF officials,  and reviewers, including Birsen Sirkeci, Feruza Amirkulova, Raymond K. Yee, […]

See our new work at the International Mechanical Engineering Congress and Exposition, IMECE2019 November 11-14, 2019. Joseph Dei Rossi, Ozgur Keles, and Vimal Viswanathan, Fused deposition modeling with added vibrations: a parametric study on the accuracy of the printed parts, Proceedings of the ASME 2019 International Mechanical Engineering Congress and Exposition, IMECE2019 November 11-14, 2019, Salt Lake City, […]

I thank the SPE club for the nomination and committee for the Advisor of the Year award at SJSU. Posted 6th June 2019 by Ozgur Keles

I will be presenting our work on: Mechanics of additively manufactured hierarchical materials Abstract: Additive manufacturing (AM) is increasingly used for biomedical, automotive, space, defense, transportation, and consumer product applications. Fused deposition modeling (FDM) is most common AM technique that can produce polymer, composite, metal, and ceramic materials. Extrusion-based FDM allows structure control at macro- […]

Title: Additively Manufactured Biomimetic Polymers Özgür Keleş Date: 5/11/2019Time: 10:30 AM – 11:30 AMLocation: San Jose State University Second Floor – Student Union buildingStudent Union building on map: “SU” at grid 3 – B/C              Campus map:  http://www.sjsu.edu/map/     ABSTRACT: Additive manufacturing (AM) is increasingly used for biomedical, automotive, space, defense, transportation, and consumer product applications.  […]

Group member Eric Anderson ([email protected]) got the Donald Beall Award for Engineering Accomplishment. Eric investigated the effects of lattice density on stochastic fracture of 3D printed composites. He also manufactured composites via vibration-assisted fused deposition modeling (VA-FDM), which we developed to reduce inherent porosity in extrusion 3D-printed materials. Eric also processed biomimetic porous polymers with […]