The Department of Mechanical Engineering organized an Expert Lecture on “Principal Stresses and Strains” on October 04, 2022. This lecture was delivered by Dr. Sachin Kumar, Associate Professor, Department of Mechanical Engineering, IIT Ropar. The students were acquainted with the concept of Principal Stresses and Strains in the subject of Strength of Materials. During this lecture, students learned about the process of identifying the section under Principal Stresses and how to modify them. Students were also apprised about various case studies related to failure under the action of principal Stresses.