In this paper, the crack detection and depth ratio estimation method are presented in beamlikestructures using Elman Networks. For this purpose, by using the frequencies of modes asinput, crack depth ratio of each element was detected as output. Performance of the proposedmethod was evaluated by using three numerical scenarios of crack for fixed-simply supportedbeam consisting of a single crack...

In this study, the natural frequencies and mode shapes of beams without cracks and cracked Timoshenko beams is calculated with different boundary conditions using finite element method. The energy method is used to solve the equations. Hardness and softness matrices for Timoshenko beam without crack are obtained by solving the potential and kinetic energy equations. Then for investigation of cr...

The pulley frame of a rotary drilling rig is located at the top mast and plays role changing direction wire rope movement. For certain type rig, front cover plate main was cracked damaged during working process, vibration signal tested under relevant conditions using test method. 3D computer-aided design (CAD) modelling performed Creo software, from PTC [1]. CAD model used to create finite elem...

This paper presents the mixed mode I/II stress intensity factors (SIFs) of slanted cracks/notches under tension loading. A two-dimensional finite element analysis (FEA) was employed using ABAQUS program. Based on literature survey, there is a lack solutions for SIFs cracks in plane plates. The strain energy approach (SEA) adopted to analyze notched cases. Mode I and II are derived via SEA metho...

In this study, the fatigue behavior of composite patched and non-patched Al 5083 aluminum plates was numerically investigated. Aluminum with semi-circular notched (2, 3 4 mm long cracked) "V" (30°, 45° 60° angled) were used in analyzes. Mechanical properties plate, DP460 type adhesive produced by 3M [0°]8 glass fiber reinforced patch material for study. The Finite Element Method applied numeric...

The authors Nuri F. Ince, Post-Doctoral Associate and Ahmed H. Tewfik , Professor, are with Department of Electrical and 5 Computer Engineering, University of Minnesota, Minneapolis, MN, USA. Ibrahim Onaran, PhD Student, and A. Enis Cetin, 6 Professor, are with Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey. Habil Kalkan, PhD 7 Student, and Yasemin Yard...