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Full-Text Articles in Engineering
The Arched Flexure Vsa: A Compact Variable Stiffness Actuator With Large Stiffness Range, Joseph M. Schimmels, Daniel Garces
The Arched Flexure Vsa: A Compact Variable Stiffness Actuator With Large Stiffness Range, Joseph M. Schimmels, Daniel Garces
Mechanical Engineering Faculty Research and Publications
The high stiffness of conventional robots is beneficial in attaining highly accurate positioning in free space. High stiffness, however, limits a robot's ability to perform constrained manipulation. Because of the high stiffness, geometric conflict between the robot and task constraints during constrained manipulation can lead to excessive forces and task failure. Variable stiffness actuators can be used to adjust the stiffness of robot joints to allow high stiffness in unconstrained directions and low stiffness in constrained directions. Two important design criteria for variable stiffness actuation are a large range of stiffness and a compact size. A new design, the Arched …
Effect Of Nd:Yag Laser Parameters On The Penetration Depth Of A Representative Ni–Cr Dental Casting Alloy, Youssef S. Al Jabbari, Theodoros Koutsoukis, Xanthoula Barmpagadaki, Ehab A. El-Danaf, Raymond Fournelle, Spiros Zinelis
Effect Of Nd:Yag Laser Parameters On The Penetration Depth Of A Representative Ni–Cr Dental Casting Alloy, Youssef S. Al Jabbari, Theodoros Koutsoukis, Xanthoula Barmpagadaki, Ehab A. El-Danaf, Raymond Fournelle, Spiros Zinelis
Mechanical Engineering Faculty Research and Publications
The effects of voltage and laser beam (spot) diameter on the penetration depth during laser beam welding in a representative nickel–chromium (Ni–Cr) dental alloy were the subject of this study. The cast alloy specimens were butted against each other and laser welded at their interface using various voltages (160–390 V) and spot diameters (0.2–1.8 mm) and a constant pulse duration of 10 ms. After welding, the laser beam penetration depths in the alloy were measured. The results were plotted and were statistically analyzed with a two-way ANOVA, employing voltage and spot diameter as the discriminating variables and using Holm–Sidak post …