2025 ASEE Annual Conference & Exposition

Creating Measurement Fixtures for Verifying Geometric Tolerances

Presented at ME Division 10: Innovation in the Sophomore Year

Measurement fixtures are developed to explain the form (circularity and cylindricity) and orientation (angularity) geometric tolerances in a Senior Level elective course on Geometric Dimensioning and Tolerancing (GD&T). The fixtures are easy to implement, cost effective, and the measurement activities are scalable to large classes. Students who participated in the course indicate in an end-of-semester survey how measurement activities relying on these fixtures can bridge the gap between the symbols in the engineering drawing and their physical meaning.

Authors

Prof. Oziel Rios University of Texas at Dallas [biography]

Dr. Oziel Rios earned his Ph.D. in mechanical engineering from the University of Texas at Austin in 2008 where his research focused on design of robotic systems with an emphasis on kinematic and dynamic modeling for analysis and control. Dr. Rios teaches the first-year and CAD courses in the Mechanical Engineering Department at the University of Texas at Dallas. Dr. Rios has also taught courses on Geometric Dimensioning and Tolerancing (GD&T), kinematics and dynamics, and graduate-level CAD courses. Dr. Rios’ research and teaching interests include: robotics, design, GD&T, and engineering education. Dr. Rios has received UTD President's Teaching Excellence Award, the Outstanding Undergraduate Teaching Award from UTD's Jonsson School, and the UT System Regent's Outstanding Teaching Award.
Prof. Dani Fadda University of Texas at Dallas [biography]

Dr. Dani Fadda is a mechanical engineering Professor of Practice at the University of Texas at Dallas. His background includes two decades of professional engineering practice in the energy industry where he published numerous papers and developed patented products for chemical, petrochemical, and nuclear applications. He enjoys teaching in-person and online classes and is the recipient of prestigious teaching awards. Dr. Fadda is a registered Professional Engineer in the state of Texas and an ASME fellow.
Dr. P.l.stephan Thamban [biography]

Dr. Thamban is an associate professor of instruction in the Mechanical Engineering department at the University of Texas at Dallas who contributes to the teaching mission of the department. He brings with him more than a decade long teaching experience and teaches foundational, introductory ME undergraduate courses and advanced mathematics courses for undergraduate and graduate students. He values and incorporates project-based learning components in undergraduate courses.

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