[고체역학실험] 초음파 실험 결과보고서
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분야
doc(1) Experiment of Velocity
(2) Experiment of the specimen’s length
(3) Experiment of the Depth of Defect
2. Considerations
Poisson’s ratio 0.32
The resultant data(velocity) = 5666.7
From this formula, we could determine the modulus of elasticity,
Theoritical value of E of steel is 200GPa, error would be
Fig.1 Property of materials.
2. Considerations
We could figure out material's properties and method of finding defect of the specimen. Ultrasonic wave value was almost same with steel. Sonic speed value in steel is approximately 5.94km/s, and Ours is 5.67km/s.
Main reason of experimental error may be summarized as follows. 't' value which means 'time' is obtained by eye measurement in oscilloscope graph. So it could
