◎압전기 효과
압전기 효과에는 압전기 직접효과와 압전기 역효과가 있다. 전자의 압전기 직접효과란 압전소자에 외부응력, 진동변위 등을 가하면, 그 출력단에 전기 신호가 발생하는 현상을 말한다. 또한 후자의 압전기 역효과란 압전소자에 외부로부터 전압을 가하면 소자가 기계적 변위를 일
3.2.The first product (2007 - present)
3.2.1.Main article: Mastretta MXT
Mastretta (est. 1989) first announced production of their MXT through Automóvil Panamericano magazine in May 2007. Even though up to a year will have passed, September 2008 will see the production version of the first ever fully Mexican designed and engineered serial-produced sports car, the Mastretta MXT, an automo
of thermoplastic material to form layers as the material hardens immediately after extrusion from the nozzle.
The nozzle can be moved in both horizontal and vertical directions by a numerically controlled mechanism.
SLA - Stereolithography
An additive manufacturing process by curing a photo-reactive resin
Liquid ultraviolet curable photopolymer and an ultraviolet laser to build layers
T
of 800*800mm2 in cross-sectional area and 1800mm in depth.
V-shaped promoter were located on the test surface 1200mm downstream from the plate edge.
*Measurements
Promoter : the length of the side B, the height H, the attack angle α
B=20mm(fixed) / H=2.5,5,10,20 and 30 mm / α=180,150,120,90,60 and 30 degrees)
2-3. Results & Discussion
When α=90° and H=10 mm is the optimal condition.