پديدآورندگان :
Azadi M. m_azadi@semnan.ac.ir Assistant Professor, Faculty of Mechanical Engineering, Semnan University, Semnan, Iran; , Sayar H. M.Sc. student, Faculty of Mechanical Engineering, Semnan University, Semnan, Iran , Alizadeh M. M.Sc. student, Faculty of Aerospace Engineering, Semnan University, Semnan, Iran , Raeisi N. M.Sc. student, Faculty of Aerospace Engineering, Semnan University, Semnan, Iran , Moosavian A. Engine Tests and Validation Department, Irankhodro Powertrain Company, Tehran, Iran , Ghasemi-Ghalebahman A. Assistant Professor, Faculty of Mechanical Engineering, Semnan University, Semnan, Iran , Jafari S. M. Assistant Professor, Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, A.C., Tehran, Iran , Shakouri M. Assistant Professor, Faculty of Aerospace Engineering, Semnan University, Semnan, Iran
كليدواژه :
Carbon , Epoxy Composite , Acoustic Emission , Vibration Analysis , Failure Mechanisms Detection.
چكيده فارسي :
Nowadays, the use of carbon/epoxy composites is vast in industries, according to their high ratios of the strength to the weight. These composite structures are exposed to failures under mechanical loadings. Therefore, to detect such failures in such structures is important for engineers. There are different methodologies for the detection of failure mechanisms. In the present research, the acoustic emission method and the vibration analysis have been utilized to detect failure mechanisms in carbon/epoxy laminated composites under tensile loadings. In addition, a comparison has been performed between the detection accuracy of these diagnostic approaches. Besides, results of these methods have been compared to images by the scanning electron microscopy. For such objective, the open-hole standard specimen was used for tensile testing. The acoustic emission sensor and also the accelerometer have been installed on specimens. Obtained results showed that two methods could reliably detect failure mechanisms in carbon/epoxy composites. But the accuracy of the acoustic emission approach was more desirable, compared to results of the vibration analysis in the detection of the type of failure mechanisms and their amounts in carbon/epoxy composites.
