Kavan Weekly Update 7/20/16

1. Finalized the single crystal paper and submitted to KT. We are planning to submit the paper by Thursday.
2. Worked with REAP students. We performed 3-point bending test in the Dental School at University of Maryland to measure mechanical properties of the new composites we are making for tooth filling application.
3. Preparing myself for Innovation Engineering 3 hours lecture which is going to be held July 20.

Protected: Meng Weekly Update(07/20/2016)

This content is password protected. To view it please enter your password below:

Protected: Meng Weekly Update(07/13/2016)

This content is password protected. To view it please enter your password below:

Kavan weekly update: June 30, 2016

1. Annealed single crystal and performed compression test. The objective is to investigaate the effect of I1 fault on c+a dislocation nucleation.
2. Worked on the single crystal paper. I am rewriting the drag regime section with an appropriate schematic that can be used to explain the idea beer. This will be done by tomorrow.
3. Visited University of Alabama in Huntsville

Kavan Weekly Update: April 20, 2016

1. Worked with Haitham El Kadiri on Mg single crystal results. The objective is to understand the twin boundary interaction with c+a dislocation from the TEM, EBSD and DIC  results. Inspiring from the strain rate effect of twin variant selection, we are also looking in the effect of pre-existing dislocation in twin variant selection under quasi-static regime.
2. Worked with Charles on the idea of the effect of the thermal fatigue on the observable traits of the planetary bodies. We found some correlation between thermal inertia and the particle size distribution of the regolith that can be justified by thermal fatigue induce disaggregation.

Kavan Weekly Update 4/13/2016

1. Attended to the MACH conference
2. Final edit on Magnesium single crystal paper
3. Worked with Charles to find a correlation between astroids thermal inertia and composition of the chondrite analogue.

Protected: Meng Weekly Update(03/30/2016)

This content is password protected. To view it please enter your password below:

Andrew Weekly Update

1.) Zeroing in on a piezo electric actuator for dynamic applications. Specifically, our application is defined in the industry as a dynamic, pulsed drive operation.

  • This mode is commonly used for valves and switch relays in practice
  • For pulsed applications, there are piezo effects, and drive system effects (electrical drivers)
    • Piezo Effects:
      • The inertia of the actuator itself can lead to overshoot, and subsequent tensile stresses. Tensile stresses are not handled well by piezoelectric ceramics. These effects can be suppressed by the addition of resistance springs to mitigate overshoot.
      • Heat buildup in the piezo. This is probably not an issue for us because we are only doing a single isolated pulse so the dissipation factor (~0.5% heat loss) of the PZT will not play a role.
    • Electrical Component Effects:
      • the maximum velocity of the actuator depends on the peak current of the power supply
      • maximum acceleration depends on the slew rate of the power supply

2.) Writing a outline for the literature review of the the thesis


Protected: Meng Weekly Update (02/23/2016)

This content is password protected. To view it please enter your password below: