InSIS Webinar Series (27) Fatigue behavior of welded and additively manufactured specimens – recent work from a design engineer’s perspective.

Abstract:

Structural safety is of utmost importance for a design engineer in the aerospace domain. However, ensuring integrity through an extremely large safety factor leads to heavy parts and lower efficiency, and thus negatively impacts sustainability aspects. In order to meet the safety and sustainability requirements in a balanced way, there is a continuous effort to develop methods that can accurately predict the behavior of parts under various types of mechanical loading.

This presentation describes observations from fatigue and fracture tests conducted on laboratory coupons made of typical aerospace materials. Different parts of the presentation focus on different manufacturing routes, such as forging, welding, and additive manufacturing. Test results are compared with predictions from analytical methods, which are primarily based on fracture mechanics principles. These investigations lead to a better understanding of (i) the behavior of the material under mechanical loading, (ii) the veracity of the analytical predictive methods, and (iii) the challenges associated with accurate life prediction of engine components.

Bio-data of the speaker:

Dr. Sushovan earned his PhD in Mechanical Engineering from Indian Institute of Science working under the supervision of Professor R. Narasimhan. He continued his research as a post-doc with Professor Bob Dodds at the University of Illinois at Urbana-Champaign. Since then he has worked as a practicing engineer in various industry sectors. Currently he works at GKN Aerospace and at University West,
Sweden.

Organized by:

InSIS and Center for Structural Integrity of Safety Critical Systems, IIT Madras