본 보고서는 2008-2학기 기계요소설계 강의에서 학습한 내용을 바탕으로 Carbon Steel 재질의 Fully reversed loading shaft(축) 설계 프로젝트를 진행한 결과물이다. 주어진 조건을 가지고 ASME Method와 S-N Diagram을 이용하여 축의 정역학적 구조를 해석하였으며 그에 따라 구한 직경과 기본물성을 바탕으로 축의 양 끝
● Definition of plasma
Plasma is one of the four fundamental states of matter, along with solid, liquid, and gas. It is an ionized gas consisting of a collection of charged particles, including ions, electrons, and neutral atoms or molecules. Plasma can be found naturally in the universe in the form of stars, lightning, and auroras, but it can also be artificially created and controlled for
Introduction (What is plasma?)
1. Definition of plasma
Plasma is one of the four fundamental states of matter, along with solid, liquid, and gas. It is an ionized gas consisting of a collection of charged particles, including ions, electrons, and neutral atoms or molecules. Plasma can be found naturally in the universe in the form of stars, lightning, and auroras, but it can also be artif
temperature transformation diagram): 온도, 시간, 변태곡선
3) 표면 경화법
① 화학적 표면 경화법
ⅰ) 침탄법: 고체(목탄, 코우크스), 가스(CO,CO2,메탄,에탄,프로판), 침탄깊이 0.5~2mm
ⅱ) 시안화법: KCN, NaCN (청화법)
ⅲ) 질화법: NH3, 50~100 Hr, 자동차의 크랭크축, 캠, 펌프축 등에 사용. 질화층 0.4~0.8mm
* 특징
temperatures vary from about 30°C to 20 degrees;
There are 5000km of coastline, 450km of barrier reef and 250 islands.
1.2 People/Language
Madagascar has been populated by successive waves of migrants from various corners of the Indian Ocean, each bringing their own customs and beliefs.
In 2013, the population of Madagascar was estimated at just over 22 million, 90 percent of whom live o
Ⅰ. 서론
인류 삶의 진정한 모체는 이 대지를 뒤덮고 있는 녹색식물이다. 식물의 잎사귀 이면에는 공기구멍이 있는데, 식물은 이를 통해 이산화탄소를 들이마시고 산소를 내뿜는다. 잎사귀들이 매일 같이 광합성 작용으로 인간과 동물들에게 산소와 먹이를 제공해 주고 있다 식물은 또 다목적 댐의
Background of Experiment
□ Al-Si Alloy
AI + Si = Al-Si Alloy
1. Low melting point
2. light
3. Large heat capacity
4. Insoluble to each other
.
.
.
Result and Analysis - EDS
□ Composition Analysis
Al, Si is almost insoluble to each other at rsoom temperature.
All solid phase will have either 100% Al phase or 100% Si phase.
Fatigue Failure Process
균열발생 단계(Crack-Initiation Stage)
공업재료는 연성이며 제조한 상태대로는 균열이 존재하지 않지만, 일반적으로는 입자, 함유물 등을 포함하고 있다고 가정한다. 미시적 크기에서 금속은 균질하지도 않고 등방성도 아니다. 또한 기하학적으로 응력집중(노치)이 되는 부분이 있다
2.7 Shrinkage
- Theoretical value: (a=35, : Maximum Shrinkage Strain Ratio)
- The process of finding 'a'
1. Arranging excel data
2. Finding 'a' with using a grapher program
(Converting Excel data into graph shape)
(Standardization of graph through regression analysis)-회귀분석을 통한 그래프 평균화
(Finding 'a' with using shrinkage equation)
3. Finding 'a'
-Conclusion & Discussion
Poisson's ratio is derived by dividing the horizontal strain modulus by perpendicular strain modulus. Poisson's ratio is a characteristic value of materials, and concretes have 0.16∼0.22 of it. The Poisson's ratio from the first experiment is 0.18 and this is comprised in the range of theory, and the value from the second experiment is 0.16 which also comes under th