# lec2 - 2.001 - MECHANICS AND MATERIALS I Lecture #2...

This preview shows pages 1–5. Sign up to view the full content.

∑∑ 2.001 - MECHANICS AND MATERIALS I Lecture #2 9/11/2006 Prof. Carol Livermore TOPIC: LOADING AND SUPPORT CONDITIONS STRUCTURAL ANALYSIS Tools we need: 1. Recall loading conditions (last time) a. Forces - (”Point Loads ”) Point of Application Magnitude Direction b. Moments From forces applied at a distance from a point. 2. Recall equation of static equilibrium (last time) F ± =0 F x ,F y z M ± 0 M x ,M y z 3. Distributed Loads - Force per unit length 4. Concentrated Moment - Moment applied at a point (EX: Screwdriver) 1

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

View Full Document
FREE BODY DIAGRAMS Draw like a mechanical engineer Fixed Support Cannot translate horizontally or vertically. Cannot rotate. Pinned Support - Cannot translate. - Free to rotate. Pinned on Rollers - Cannot translate in y. - Can translate in x. - Free to rotate. REACTIONS: (Forces applied by a support) 2
No ± ² can apply R x . ↑↓⇒ can apply R y . No rotate can apply M . So: Need R x ,R y ,M Need R x y 3

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

View Full Document
Need R y OTHERS: CABLE: SMOOTH SUPPORT: EXAMPLE: DIVING BOARD Find reactions from the supports for this structure.
This is the end of the preview. Sign up to access the rest of the document.

## lec2 - 2.001 - MECHANICS AND MATERIALS I Lecture #2...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online