Papers by Md Eftaykharul Islam
Md Mazharul Islam , 2019
Lamb wave is widely recognized as one of the most promising tools used in solid plates, composite... more Lamb wave is widely recognized as one of the most promising tools used in solid plates, composite materials and structural characteristics for quantitative identification damage. Lamb waves are regarded as a pioneer in this field of non-destructive testing (NDT). In this study, ANSYS and LS-DYNA software are used to generate the Lamb wave simulation by finite element modeling. Explicit dynamics (LS-DYNA Export) analysis has been used in ANSYS analysis system. Sinusoidal load was applied at the edge of one end of the rectangular plate for the loading case. Lamb wave dispersion curve was calculated in steel plate. The theoretical dispersion curve was derived from the internet source and experimental dispersion curve was attained by numerical simulation. Both theoretical and experimental results are almost identical.
Md Eftaykharul Islam , 2019
Today there is a rapid increase in technological development and the use of CNC machine. CNC plot... more Today there is a rapid increase in technological development and the use of CNC machine. CNC plotter machine is a 2D plotter machine powered by 3D that uses a pen to draw text or image or any solid surface. This project's aim is to model the plotter and develop open source software for machine control. Essentially, this plotter machine's system is designed to operate with three axes stepper motors (like X, Y and Z axes) using solid work technology, these three stepper motors are operated by CNC shields for motion (X, Y and Z axes). Travel length means the linear motion of stepper motors which control point-to-point X, Y and Z axes. The left and right movement is controlled by the stepper motor of the X axis, front-back movement is controlled by the stepper motor of the Y axis and the pen is up-down controlled by the stepper motor of the Z axis. This is low-cost CNC machine production and reduced cost and complexity. Also G-codes are used for commands or instructions on this computer. To control the pen, the computer uses this G-code.
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Papers by Md Eftaykharul Islam