Mechanical stress is a research area that focuses on the study of the effects of external forces or loads on materials and structures. This field investigates how various materials, such as metals, composites, and polymers, respond to mechanical forces and how this response can lead to deformation, failure, or other changes in the material properties. Research in mechanical stress also explores how to predict, prevent, and manage stresses in engineering applications to ensure the safety, reliability, and performance of structures and components. Studies in this area often involve experimentation, simulation, and analysis techniques to better understand the complex behavior of materials under different loading conditions.