1. 실험목적
피로시험기의 측정원리를 알고, 재료의 피로응력 사이클의 형태를 이해한다. 또, S-N곡선을 조사하고 응력비 R에 따라서 수명에 어떤 영향이 있는지 파악한다.
2. 피로파괴 이론
1) 피로파괴
단일 하중에 의해 일어나는 응력보다 낮은 하중은 반복해서 받을 경우에 발생되는 파괴로
The camera is moving toward an Indian city. We are high and far away, only the sound of the wind as we grow nearer and nearer, and through the passing clouds these words appear:
No mans life can be encompassed in one telling. There is no way to give each year its allotted weight, to include each event, each person who helped to shape a lifetime. What can be done is to be faithful in spirit to the
We sweep slowly across an endless tapestry of stars. Finally she comes into view: The U.S.S. AURIGA. A massive research vessel that sits majestically just beyond Plutos orbit.
WE TRACK ALONG the side of the ship, and...
INT. AURIGA
... along the silent, empty corridors, coming at last to a door with two guards standing rigid in front of it. Full armour, powerful shockrifles, expressions empty and
1. Objective 1)
PVA(poly(vinyl alcohol)) is prepared by hydrolysis of PVAc(poly(vinyl acetate)), which is synthesized by emulsion polymerization of vinyl acetate.
2. Theory
1) Monomer 7)
A monomer is an atom or a small molecule that may bind chemically to other monomers to form a polymer. The term "monomeric protein" may also be used to describe one of the proteins making up a multiprote
Significantly higher surface area and much narrower pore size distribution in the mesopore region
A large amount of amine-type CO2 capturing agent into its mesopores in a well dispersed manner
Synthesis of MA
PEI impregnation on MA
Amine grafting on MCM-41
Characterization of the materials prepared
CO2 adsorption-desorption measurement
Al(i-PrO)3 (41.68g)+ Alcohol solvent