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The article presents the results of crack detection using a tri-axis, multi-position laser vibrometer in a plain strain condition. It also presents the results of crack detection in a finite element model, which simulates the crack initiation and progression in aluminum beams. The ultrasonic guided waves generated by a piezoceramic transducer are used to monitor the fatigue crack propagation. It shows that the first fatigue crack detected at the top of the beam is followed by a propagating mode-II crack. The cracks are detected earlier than that they are initiated at the mid-span of the beam.
An iterative finite element model is used to analyse the fatigue process. The aluminium plate is represented as a beam element. The ultrasonic guided waves are used to monitor the fatigue crack propagation. The analyses were performed at various locations along the beam. Results show that the first fatigue crack detected at the top of the beam is followed by a propagating mode-II crack. The cracks are detected earlier than that the cracks are initiated at the mid-span of the beam.
The paper presents the results of crack detection using a tri-axis, multi-position laser vibrometer in a plain strain condition. It also presents the results of crack detection in a finite element model, which simulates the crack initiation and progression in aluminium beams. The ultrasonic guided waves are used to monitor the fatigue crack propagation.
In addition, the results of crack detection using a tri-axis, multi-position laser vibrometer in a plain strain condition shows that the first fatigue crack detected at the top of the beam is followed by a propagating mode-II crack. The results are compared with those obtained from a finite element model, which simulates the crack initiation and progression in aluminum beams.
Monitoring the fatigue crack progression in metallic structures using ultrasonic guided waves has been challenging. For this reason, the use of laser vibrometry is a promising approach to crack monitoring in metallic structures. This study presents the results of crack detection in a finite element model and an experimental test using a tri-axis, multi-position laser vibrometer in a plain strain condition.
The ultrasonic guided waves can also be used to evaluate the final crack length in the beam. This study shows the potential of laser vibrometry for monitoring the fatigue process and the use of ultrasonic guided waves for crack detection.
Autodesk Map 3D 2007 is a standalone program intended for both design and manufacturing users. The program is integrated with Autodesk Civil 3D 2007, and Civil Design 3D and Civil Design Professional. Other programs, such as Autodesk Process and Autodesk Architectural Visualization, generate 2D or 3D drawings (2D or 3D CAD files) and work with Autodesk Map 3D 2007.
Civil3D is the premier 3D design software for civil engineering and infrastructure design, providing all the capabilities and features needed to support complex projects, including 3D design, construction and visualization for any project. Civil3D is the advanced 3D design and analysis software from PTC, and it helps you build, visualize and analyze the world’s most complex civil, infrastructure and geotechnical projects. Civil3D is built around the groundbreaking PTC Grasshopper 3D mobile collaboration, construction and virtual reality platform. 827ec27edc