B. Gangadhara Prusty - IEEE Xplore Author Profile

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Riveted steel bridges, which were built in the early 20th century, require their regular structural integrity assessment to avoid any catastrophic failure. This article presents continuous strain monitoring of a single riveted lap joint, which is a representative critical element of riveted steel bridges through an optical frequency domain reflectometry (OFDR)-based distributed fiber optic sensor ...Show More
A study on the design, framework, experimental arrangement, data acquisition, and subsequent analysis of cold crack detection using fiber Bragg grating (FBG) sensors during welding is presented. Cold crack induced acoustic emission (AE) events are detected by multiple FBG sensor configurations and using a commercial FBG AE interrogation system. The crack locations are theoretically predicted using...Show More
Manufacturing of composites using automated fiber placement (AFP) is a complex process that involves large number of processing conditions and variables. Improper selection of these parameters adversely affects the quality and integrity of the manufactured laminates. Thus, it is important to develop a predictive model that can assess how changes in critical process conditions alter the outputs of ...Show More
The interface between the residual limb and the socket of a person with an amputation experiences complex loading conditions during daily activities. Currently, the effect of such loading conditions on tissue health and comfort is poorly assessed. This is largely due to the lack of appropriate sensing technology to facilitate measurement of strains/stresses at this interface. This paper will outli...Show More
Structural health monitoring (SHM) of engineering structures plays a crucial role in ensuring their safety and integrity. Acoustic emissions (AE) can be one of the several ways to monitor the structural health. Fiber Bragg grating (FBG)-based AE measurement technique is emerging as a solution to assess cracks in structures remotely and has advantages of being less bulky and having low noise, high ...Show More
The present study investigates the small data learning problem and proposes the optimum combination of Virtual Sample Generation (VSG) methods and various machine learning tools which would give highest learning accuracy. Although this small data problem has been studied by various researchers in the recent past, the selection of appropriate VSG methods and machine learning tools, which would yiel...Show More
A novel means of metal packaging of a fiber Bragg grating (FBG) sensor using stainless steel and tin, together with high temperature resistant samarium cobalt (SmCo) magnet is proposed in this paper. The inclusion of high temperature-capable SmCo magnets enable the metal packaging of the FBG sensor with magnetic capabilities. This packaged sensor can be placed in direct contact with the substrate ...Show More
Fibre Bragg grating based acoustic emission measurement technique is employed to monitor crack activity in civil engineering structures and sites. The feasibility and effectiveness of using fibre optic methods for crack activity monitoring is demonstrated with three example cases (a) railway ballast breakage (b) cold crack monitoring in welding (c) crack activity monitoring in rock samples. The su...Show More
The potential for increased productivity offered by automated tape placement method has opened up a wider range of applications as well as new markets for lightweight, fiber-reinforced composite materials in various industries. However, different flaws such as voids or delaminations may still occur during or after layup. In the experimental work presented in this paper, glass fiber/HDPE laminates ...Show More
A fibre optic acoustic emission method to monitor hydrogen induced cold crack activities during welding is presented in this paper. A high sensitivity fiber Bragg grating (FBG) based acoustic emission (AE) measurement system is developed to monitor the cold crack induced AE events during a titanium aluminide alloy welding using gas tungsten arc welding method Frequency ranges of the AE where cold ...Show More
The significance of etched single-mode polymer optical fibers and their potential for the development of high-sensitivity sensors are presented. A polymethyl methacrylate-based single-mode polymer optical fiber is etched to various diameters and it is observed that etching can lead to change in the material properties of the fiber, such as Young's modulus and thermal expansion coefficient. This ca...Show More
Damage progression, failure discrimination and analysis have been undertaken by embedding FBG sensor arrays as strain sensors. Average strain, strain gradient and full spectrum measurements were obtained from the FBGs for the structural health monitoring of composites.Show More