Makine Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1944

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Author: search.filters.author.Fu, XingDepartment: search.filters.department.Mühendislik Fakültesi, Makine Mühendisliği Bölümü

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  • Conference Object
    Laser-Generated Surface Acoustic Wave-Based Study and Detection of Surface Cracks
    (Int. Sc. & Tech. Conf. Beam technologies & Laser Applications, 2015) Chen, Kun; Dorantes, Dante; Li, Tingting; Dorantes-Gonzalez, Dante Jorge; Li, Yanning; Wu, Sen; 02.03. Department of Mechanical Engineering; 02. Faculty of Engineering; 01. MEF University
    Monitoring cracks to check the integrity of engineering materials by Non- Destructive Testing (NDT) in industry is significant in industry. And within the NDT techniques, Laser-Generated Surface Acoustic Wave technique (LSAW) has shown to be a promising technique. To further develop non-contact and accurate testing strengths of this method, models for analyzing the generation, propagation and tracking of surface acoustic waves (SAW’s) changes in S45C steel samples with distributed cracks are developed by using Finite Element Method (FEM). Time and frequency domain analyses are used to process the acoustic wave signals after the interaction with cracks. The simulation results and preliminary analyses reveal the good potential LSAW’s have to monitor cracks. First results in developing an experimental setup for crack detection are also provided.
  • Article
    Citation - WoS: 5
    Citation - Scopus: 5
    Simulation Study and Guidelines To Generate Laser-Induced Surface Acoustic Waves for Human Skin Feature Detection
    (Elsevier, 2015) Chen, Kun; Dorantes, Dante; Wu, Sen; Li, Yanning; Li, Tingting; Fu, Xing; Dorantes-Gonzalez, Dante Jorge; Hu, Xiaotang; 02.03. Department of Mechanical Engineering; 02. Faculty of Engineering; 01. MEF University
    Despite the seriously increasing number of people contracting skin cancer every year, limited attention has been given to the investigation of human skin tissues. To this regard, Laser-induced Surface Acoustic Wave (LSAW) technology, with its accurate, non-invasive and rapid testing characteristics, has recently shown promising results in biological and biomedical tissues. In order to improve the measurement accuracy and efficiency of detecting important features in highly opaque and soft surfaces such as human skin, this paper identifies the most important parameters of a pulse laser source, as well as provides practical guidelines to recommended proper ranges to generate Surface Acoustic Waves (SAWS) for characterization purposes. Considering that melanoma is a serious type of skin cancer, we conducted a finite element simulation-based research on the generation and propagation of surface waves in human skin containing a melanoma-like feature, determine best pulse laser parameter ranges of variation, simulation mesh size and time step, working bandwidth, and minimal size of detectable melanoma.