American Journal of Mechanical and Industrial Engineering

Volume 4, Issue 5, September 2019

  • A Comparative Study on Beam Divergence Angle and Wave Length Between Semiconductor Laser and Helium-Neon Laser

    Senamaw Mequanent Zgeye

    Issue: Volume 4, Issue 5, September 2019
    Pages: 69-75
    Received: 21 September 2019
    Accepted: 30 October 2019
    Published: 5 November 2019
    Abstract: In this experimental study, I have seen that a comparative study on semiconductor laser and Helium-Neon laser is presented using the experimental techniques and tried to compare the experimental value with that of the theoretical one. On this work the wave length and beam divergence angle of the two types of lasers up to ten number of trials in the... Show More
  • The Spatial and Temporal Distribution of Rock Breaking Effect of Explosion Stress Wave of Slotted Cartridge

    Yanbing Wang, Bingbing Yu, Ji Kong, Maike Wang

    Issue: Volume 4, Issue 5, September 2019
    Pages: 76-85
    Received: 19 September 2019
    Accepted: 29 September 2019
    Published: 6 November 2019
    Abstract: The propagation characteristics and rock breaking mechanism of explosive stress wave have aroused the interests of many researchers. This work proposed a method that separates the explosion stress wave from detonation gas and designed the testing unit accordingly. It combined the resistance ultra-dynamic strain test to conduct the strain measuremen... Show More