TITLE:  Contact Stresses

PRICE: AGMA Members: Free

             Non-members:     $99

DATE:  March 19, 2013 at 1:00 PM ET

PRESENTER: Steven R. Schmid, Professor of Mechanical Engineering, University of Notre Dame


This is a webinar for design engineers. The presentation will be fairly technical, but will be easily understood by anyone with a technical bachelor's degree.


This webinar will cover the stresses that result in gear tooth contact, including Hertzian contact stress theory, and point and line contacts.  Professor Schmid will also extend the discussion to cover elliptical contact and the application to gears.  



Following this webinar, attendees will be able to -

  • Appreciate the nature of nonconformal contacts, their stresses and benefits of lubrication
  • Calculate the contact stresses and deformations associated with gear contacts of all kinds
  • Understand the basic scientific background of the AGMA contact stress equations



  • Strength of gears, including effects of manufacturing process on gear quality index and associated costs; stress cycle factors and other modifications; effect of lubrication regime 
  • An introduction to bending of gear teeth, the factors that affect stress and strength, and the design approaches to reduce bending stresses
  • The nature of fatigue wear, methods to eliminate or reduce fatigue wear (pitting resistance)
  • Application of lubrication theory to gears
  • The AGMA equations and their relationship to Hertzian contact


Course Information
Date Presented:
March 19, 2014 1:00 PM Eastern
1 hour, 30 minutes
Contact Stresses
Steven R. Schmid, Professor, Mechanical Engineering, University of Notre Dame

Steven R. Schmid is an associate professor in the Department of Aerospace and Mechanical Engineering at the University of Notre Dame, where he teaches and conducts research in the general areas of manufacturing, machine design, and tribology. He received his bachelor’s degree in mechanical engineering from the Illinois Institute of Technology (with Honors) and master’s and Ph.D. degrees, both in mechanical engineering, from Northwestern University. 

He has received numerous awards, including the John T. Parsons Award from SME (2000), the Newkirk Award from ASME (2000), the Kaneb Center Teaching Award (2000 and 2003), and the Ruth and Joel Spira Award for Excellence in Teaching (2005). He is also the recipient of a National Science Foundation CAREERS Award (1996) and an ALCOA Foundation Award (1994). 

Professor Schmid is the author of over 100 technical papers, has co-authored Fundamentals of Machine Elements (McGraw-Hill), Fundamentals of Fluid Film Lubrication (Dekker), Manufacturing Processes for Engineering Materials (Prentice Hall), and has contributed two chapters to the CRC Handbook of Modern Tribology. He is a registered professional engineer, a certified manufacturing engineer of SME, a member of the North American Research Institution, and a fellow of the ASME. In 2012, he was named an ASME Foundation Swanson Fellow and served as Assistant Director for Research Partnerships at the Advanced Manufacturing National Program Office, National Institute for Science and Technology.

Individual topic purchase: Selected
AGMA Member Price:$0.00
Non-Member Price:$99.00
CD-ROM (Win)
AGMA Member Price:$0.00
Non-Member Price:$99.00