Lecture # 5 and 6

1 / 13

# Lecture # 5 and 6 - PowerPoint PPT Presentation

Lecture # 5 and 6. Mechanicial Properties of Materials. Objectives:. 1): Relating Stress to Strain using experimental method. 2): Plotting Stress verses Strain (Stress – Strain diagram) 3): Extracting mechanical properties from  – diagram. The Tension and Compression Test.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Lecture # 5 and 6' - mele

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Lecture # 5 and 6

Mechanicial Properties of Materials

Objectives:

1): Relating Stress to Strain using experimental method.

2): Plotting Stress verses Strain (Stress – Strain diagram)

3): Extracting mechanical properties from – diagram.

The Tension and Compression Test

Typical steel specimen with

attached strain gauge.

Electrical-resistance

Strain gauge.

The Stress – Strain Diagram

Conventional and true stress-strain diagrams

for ductile material (steel) (not to scale).

True Stress – Strain Diagram

Stress-Strain diagram for mild steel

Percent elongation =

Percent reduction of area =

Stress – Strain Behavior of

Ductile and Brittle Materials

 (mm/mm)

Hooke’s Law

Typical Stress-Strain

curve showing

modulus of resilience, MR.

Typical Stress-Strain

diagram showing

modulus of toughness, MT.

Poission’s ratio.

• Lateral contraction for a bar in tension with
• Cross-sectional dimensions.

• Undeformed bar and
• Bar subject to axial force showing deformation.

(in.) or (mm.)