나노복합재료연구실 ( Nano Composite Research Lab.)
1. Purpose of this study
■ Measurement of Young's modulus using sonic resonant test
■ Measurement of Young's modulus using beam bending test
2. Introduction
Young's modulus is one of the important materials properties that is related with the bonding force between atoms or ions in materials. That will give a cle
I. Executive summary
We will answer this question.
Recently, a short video image on Youtube made south Korean shocked for the past week. It is about a senior couple’s tragic car accident that is now getting government attention.Sudden unintended acceleration has happened many times in Korea. But Hyundai, dominated car manufacturer, said that most reasons of problem are caused deriver’s
Introduction of Hyundai
Multinational automaker
headquartered in Seoul, South Korea
Hyundai was founded in 1967 and it, along with Kia,
together comprise the Hyundai Motor Group, which is
the world’s fourth largest automobile manufacturer
based on annual vehicle sales in 2010.
The company employs about 75,000
persons worldwide. Hyundai
vehicles are sold in 193 countries
t
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
Related Physical Principle
-Evaporation
Engineering Operation Principle
-Structure
-Circulation Steps
-Heat Exchange
Influencing Factor On Wind Power
Angle: Optimum Angle Exist
Number: 3~4 is general
Material: Strong but Light
Width: Wide
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