{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# 3501-14 - Thermal Stresses in Materials Fact 1 Most...

This preview shows pages 1–3. Sign up to view the full content.

Thermal Stresses in Materials Fact: 1) Most materials tend to ________ with an increase in temperature and tend to _________ with a decrease in temperature. 2) Changes in temperature will cause changes in ___________ and/or induced thermal _________ in a structural element. Thermal Stress Analysis Involves the computation for: 1) The changes in ________ 2) The induced thermal _________ Basic Principle If the temperature of a bar of length L is raised from t o to t, the thermal expansion is: δ t = α L (t - t o ) = α L t where: α - coefficient of thermal expansion ( / º F or / º C) Thermal strain: ε t = δ t / L = α∆ t COEFFICIENT OF THERMAL EXPANSION ( α ) Concrete 4 - 8 X 10 -6 / ºF Concrete made w/ FL limestone 4.5 - 6.7 X 10 -6 / ºF Steel 6.5 X 10 -6 / ºF Aluminum 12 X 10 -6 / ºF Copper 9 X 10 -6 / ºF Wood (pine) parallel to grain 3 X 10 -6 / ºF perpendicular to grain 2 X 10 -6 / ºF

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Thermal expansion due to a temperature change of t for a bar of length L If the bar is restrained from movement at the two ends, there
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

3501-14 - Thermal Stresses in Materials Fact 1 Most...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online