Our finite element simulation results indicate that the FOCSS can significantly hasten early warning and extend the prognostic horizon, which can greatly reduce logistical burden and increase consumer confidence.
Future work aims to deconvolve FOCSS sensitivity to glue fatigue from the response to host fatigue. However, fatigue of the glue used to attach the sensors to the specimen is found to obscure the sensor’s response to host fatigue, thus presenting an important source of experimental error. The FOCSS estimated modulus is seen to decrease with accumulation of fatigue damage. The FOCSS capabilities are next verified in aluminum beam fatigue experiments. Finite element modeling is carried out, which reveals the host modulus assessed by the FOCSS is more sensitive to fatigue damage of a structure than its natural frequency (another commonly used macroscale measure of fatigue). The sensing concept is explained and the transfer function is determined from a lumped-mass spring model. Conjugate stress sensing extracts host modulus from two extensometers of different stiffnesses (termed the stiff and compliant sensors) by using a known transfer function from sensor strains to host modulus. It is known that as damage accumulates due to fatigue, microstructural changes result in an altered modulus so in this work, fatigue is continuously monitored by measuring the evolution of the effective modulus of the host. Journal of Verification, Validation and Uncertainty QuantificationĪ fiber optic conjugate stress sensor (FOCSS) is explored for monitoring fatigue in aluminum cantilever beams.Journal of Thermal Science and Engineering Applications.Edge computing based airplane auxiliary power unit health monitoring system. Journal of Offshore Mechanics and Arctic Engineering The system (100) includes a prognostic health monitoring and diagnostic unit (30).Journal of Nuclear Engineering and Radiation Science.Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems.Journal of Nanotechnology in Engineering and Medicine.Journal of Micro and Nano-Manufacturing.Journal of Manufacturing Science and Engineering.Journal of Engineering Materials and Technology.Journal of Engineering for Sustainable Buildings and Cities.Journal of Engineering for Gas Turbines and Power.Journal of Engineering and Science in Medical Diagnostics and Therapy.Journal of Electrochemical Energy Conversion and Storage.Journal of Dynamic Systems, Measurement, and Control.Journal of Computing and Information Science in Engineering.Journal of Computational and Nonlinear Dynamics.Journal of Autonomous Vehicles and Systems.ASME Letters in Dynamic Systems and Control.ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering.
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Mechanical Engineering Magazine Select Articles FogHorn’s software platform brings the power of advanced analytics and machine learning to the on-premises edge environment enabling a new class of applications for advanced monitoring and.
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