http://www.iaeme.com/IJCIET/index.asp 24 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 11, Issue 8, August 2020, pp. 24-36, Article ID: IJCIET_11_08_003 Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=11&IType=8 Journal Impact Factor (2020): 11.3296 (Calculated by GISI) www.jifactor.com ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scope Database Indexed NUMERICAL INVESTIGATION OF STRESSES IN STEEL PLATE USING LAMB WAVES Atef Eraky Professor, Structural Engineering, Civil Engineering Department, College of Engineering, Zagazig University, Egypt Walid El-Deeb Assistant Professor, Electronics & Communications Engineering Department, College of Engineering, Zagazig University, Egypt Shimaa Emad Assistant Lecture, Civil Engineering Department, College of Engineering, Zagazig University, Egypt ABSTRACT This paper detects, through numerical simulations, the stress in structures using lamb waves. The finite element model of steel plate was developed using the commercial finite element programs ABAQUS and ANSYS. Dynamic models were run for Lamb wave propagation in steel plate under the effect of different compressive and tensile stresses. The simulations have revealed that with the variation of stress there is no effect of time of flight. In the case of compressive stress, it's found that the amplitude of received wave is increased slightly with increasing of compressive stress. In otherwise of tensile stress, the amplitude of received wave is also decreased slightly with increasing of tensile stress. Keywords: Stress, Acoustoelasticity and Lamb wave Cite this Article: Atef Eraky, Walid El-Deeb and Shimaa Emad, Numerical Investigation of Stresses in Steel Plate using Lamb Waves International Journal of Civil Engineering and Technology, 11(8), 2020, pp. 24-36. http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=11&IType=8 1. INTRODUCTION Detection of stress in structural elements especially in vital structures such as bridges is very important because stress concentration can cause damage or failure of the structure. Ultrasonic stress measurement is one of the non-destructive evaluation (NDE) methods that depends on acousto-elastic theory [1]. Measurement of stresses using non-destructive technology provides early indications of failure without destroying the structures [2]. Ultrasonic and X-rays are the main methods of non-destructive evaluation that can reveal substantial subsurface flaws in materials. Other techniques such as magnetic particle eddy