Experimental Mechanics:
Experimental mechanics is a field of engineering mechanics that deals with the experimental characterization, analysis, and understanding of the mechanical behavior of materials and structures. It involves conducting physical experiments to obtain data about the behavior of materials and structures under various loading conditions and then analyzing and interpreting this data to gain insight into the underlying mechanical principles. Experimental mechanics covers a broad range of topics, including material testing, structural testing, non-destructive testing, vibration analysis, fatigue testing, and fracture mechanics. It is used to design, test, and improve structures and materials in many fields, such as aerospace, automotive, civil, and mechanical engineering. Experimental mechanics can involve a variety of testing techniques, such as tensile testing, compression testing, bending testing, torsion testing, impact testing, fatigue testing and fracture testing. The data obtained from these tests is often analyzed using statistical methods and numerical models to predict the behavior of materials and structures under different conditions. Experimental mechanics is a critical field for understanding and designing complex systems and structures, and it plays an essential role in developing new materials, improving existing materials, and ensuring the safety and reliability of engineering systems.
Research Area is Divided into Four Parts
Dynamic Behaviour of Material:
The mechanics and physics involved under high strain rates and temperatures are the central idea of high-rate deformation. The thermomechanical behaviour of lightweight materials depends on various factors, such as their loading rates, temperatures, stress-states, material orientation, microstructure, composition, processing and environmental conditions. Understanding and controlling these factors is critical for the design and optimization of lightweight materials for various applications.
Fracture Response of Metallic Material:
Dynamic fracture mechanics is the study of behaviour of materials under dynamic loadings, such as impact or explosion. It is concerned with the prediction and analysis of the initiation and propagation of cracks in materials under such loading conditions. It is based on the ideas of linear elastic fracture mechanics (LEFM), but it adds non-linear effects caused by high loading rates to the ideas. The stress intensity factor, described as the intensity of the stress field near the crack tip, is used to determine the conditions under which a crack will propagate. Dynamic fracture mechanics is used in many fields, like aerospace engineering, automotive engineering, civil engineering, materials science, and civil engineering. It is used to predict the behaviour of structures and materials under high-speed impact and to design materials and structures that can withstand extreme loading conditions.
Impact Response of Metalic Thin Plates:
The term "impact behaviour of structures" refers to the way a structure responds to a sudden impact, such as a collision or an explosion. The impact behaviour of a structure is a critical consideration in the design of structures, particularly those that are intended to withstand high-speed impacts or other extreme events. The impact behaviour of a structure is influenced by a number of factors, including target material properties, geometry, boundary conditions and projectile type (deformable or rigid), shape, velocity. Structures can also be designed with specific impact-resistant features, such as impact-absorbing materials, sacrificial components, or deformation zones that can help to mitigate damage in the event of an impact.
Digital Image Correlation:
Digital Image Correlation (DIC) is a non-contact and non-destructive technique that enables the measurement of deformation and strain on the surface of a material or structure. DIC uses digital images of a surface before and after deformation, and then analyzes these images to determine the displacement and strain fields. The basic principle of DIC is to track the movement of pixels or image features between the initial and deformed images. This is done by identifying corresponding pixels or features in the two images and then calculating the displacement vector for each pixel or feature. Once the displacement field is obtained, the strain field can be computed by taking the spatial derivative of the displacement field. DIC can be used in various fields such as material science, mechanical engineering, civil engineering, and biomedical engineering. It provides a full-field measurement of displacement and strain with high accuracy and spatial resolution. DIC has the advantage of being a non-invasive method, that does not require the installation of any sensors on the material or structure being analyzed.