My graduate student Alex Cress will be presenting his research on stochastic fracture of fused deposition modeled (3D printed) ABS in Materials Science & Technology 2016, Salt Lake City, UT. Here are the details of the conference: Effect of Build Parameters on the Variation in Mechanical Properties of Fused Deposition Modeled ABS: Alex Cress1; Ozgur […]

We investigated the effects of build orientation on the mechanical reliability of 3D printed ABS using a Stratasys uPrint SE. Thanks to my undergraduate researcher Caleb W. Blevins (second author), we were able to generate 262 specimens and test their mechanical behavior. The most important finding is that the reliability of FDM produced ABS can […]

We investigated the effect of porosity and crack size distributions on the fracture behavior of porous glass through a combined finite element and fracture mechanics method. Simulations showed that the effect of crack size distributions on the change in fracture strength with porosity decreases as the pore size to crack size ratio increases. For a […]

I joined the San Jose State University in August and recently got the Kordestani Endowed Chair position for my research projects. I would like to thank the professors: Guna Selvaduray, Melaine McNeil, Folarin Erogbogbo, Richard Chung, Essam Marouf, and our dean Andrew Hsu for their support. The Kordestani Endowed Chair position provides research funds, which […]

The details about the research projects can be found in the links, new projects will be uploaded soon. 1. Reliability of 3D-printed polymer components, click for the details. 2. Electric field effect on stress evolution in piezoelectric materials, click for the details. Posted 25th August 2015 by Ozgur Keles

I have been investigating the effects of porosity on the fracture behavior of brittle materials. In this recent work, we produced pharmaceutical compacts and tested their mechanical behavior through diametral compression tests.  I am glad that the two names in this paper–Nicholas P. Barcenas and Daniel H. Sprys–were my undergraduate researchers without whom the paper […]

We have finished the “Design for Innovation” class at the Illinois Institute of Technology (IIT). My learners–I prefer learners instead of students–have done tremendous work on projects, such as sustainable chair, trebuchet, and biomimetic robot. The details about the class can be found in the MMAE 232 website. Here are some of the pictures from the […]

Thanks again to the contributing editor Lynne Robinson, details are here. Click for the highlight article.   Posted 9th March 2015 by Ozgur Keles

Here is the story of how one of my pictures became the February cover of JOM: The Member Journal of TMS. In July 2014, I posted “Can you teach statistics in a better way?” which had some pictures generated using a small Mathematica script. As I have been working on fracture stochastics for some time, I […]

Increasing use of 3D printing techniques to manufacture consumer products raises the question:  What is the reliability of 3D printed parts/objects? I started using some of the 3D printers available at IIT to observe the effects of various printing setting on the mechanical reliability. I also try to observe quality variation between different 3D printers […]

This semester, Spring 2015, I will be teaching one of the best classes that a sophomore can take “Design for Innovation, MMAE 232,” prepared by Prof. Matthew Spenko. During the fall semester, I graded the students projects and was a guest lecturer for the same class. Design for Innovation includes a lot of concepts that are practiced […]

You can check my new publication in the Journal of The American Ceramic Society, please click. This publication investigates the combined effects of pore-pore stress interactions, crack size distributions, and crack orientation on fracture behavior of porous glass. I believe with the use of additive manufacturing techniques reliability of brittle materials will be improved.   Posted […]

You can see some of my pictures together with some great photographers’ work at The Best of Wine and Critique: A Photography Exhibit.   Posted 4th September 2014 by Ozgur Keles

Here is a point cloud generated by Gaussian, Gumbel, Frechet, and Weibull distributions. You can play with the Mathematica code given below. My question is: Can you teach statistics in a better way? pN = 500;pW = 700;pF = 1900; datN = {x, y} = {RandomVariate[NormalDistribution[-10, 5], pN],RandomVariate[NormalDistribution[-10, 5], pN]};datN = Transpose[datN]; datW = {x, […]

I will be presenting some of my symmetric pictures at Simone’s (960 W 18th, Chicago) through July 10. Opening reception will be on June 16th at 8:00pm. My special thanks go to Jessica Nicole Gorse and Chicago Photography Center. You can see some of my work in the Gallery or Flickr. Posted 11th June 2014 by Ozgur Keles

Every third Friday Chicago Photography Center hosts a Wine & Critique event, which has a monthly photography contest. This month my picture was selected as the winner for the theme: Homeless. My special thanks goes to Elizabeth Porporato, Warren Perlstein, and Bob Long Jr for their support and comments. For the past winners of the W&C, please visit CPC. For […]

It has been a great pleasure to help my students learn basics of mechanics at the Illinois Institute of Technology. Here is how we ended the semester. Details are on my teaching page.

I took some pictures during the St. Patrick’s Day parade in Chicago. Posted 16th March 2014 by Ozgur Keles

I discuss the effects of crack orientation on fracture behavior of brittle porous materials in my latest paper with Dr. Keith J. Bowman and Dr. R. Edwin Garcia. I would like to thank my editor Dr. Mark Kachanov, who is an expert in fracture mechanics and other fields. Please find a PDF copy here. Posted 3rd March 2014 by Ozgur […]

Update: I am working on interpretation of the data (~160 Gb) we generated in Argonne from the lead-free ferroelectric and ferroelastic ceramics. I helped my old and new group members Dr. Matthias Ehmke and Dr. Chris Fancher with the synchrotron X-Ray experiments in Argonne National Laboratories. It was my first time with synchrotron X-Ray, which […]

We will be doing X-Ray characterization on lead-free ceramics in Argonne National Laboratory. Posted 18th February 2014 by Ozgur Keles

I started teaching the sophomore level “Introduction to Mechanics” class at Illinois Institute of Technology, Spring 2014. It is a large class of 80 students. I believe “Being Happy” is the most important thing in learning. Please click for my first lecture. You can also check my other teachings and opinion on public education. Image from: http://en.wikipedia.org/wiki/File:Smiley.svg Posted 14th January 2014 […]

I gave a lecture on fracture statistics as a part of the Introduction to Ceramic Materials class at Illinois Institute of Technology. Please click for the lecture notes. Posted 30th October 2013 by Ozgur Keles

We are looking for Illinois Institute of Technology graduate and undergraduate students for MMAE project(s) with support up to 12$/hr. If you are interested, please send me an email. Project: Reliability engineering of pharmaceutical tablets and pills The support is up to 12.00$ per hour. 1 Graduate Research Project1 Undergraduate Research ProjectWomen and minorities are […]

This blog starts with “If you’re lucky enough to live without want, it’s a natural impulse to want to try and help others.” It is a good read and includes the related presentation.   “**Too often, we try to alleviate the suffering of those immediately in front of us by giving in a “Knee-Jerk” fashion.**Instead, we […]