Lecture+10

# Lecture+10 - 440:221 Intro to Engineering Mechanics:...

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440:221 Intro to Engineering Mechanics: Statics Instructor: Alberto Cuitino TA: Pam Carabetta and Jingru Zhang Lecture 10 Fall 2009 1 Based on Textbook Material: Engineering Mechanics Statics, 12 th Edition, R.C. Hibbeler, Pearson 2010.

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440:221 Lectures opics to be covered Topics to be covered • Is possible to reduce (simplify) a force/couple system? • Is there any advantages in doing so? • What is the procedure? hat is an equivalent system? What is an equivalent system? • When do we use equivalent systems? School of Engineering, Fall 2009 2
440:221 Lectures reliminary Questions 1. A general system of forces and couple moments acting n a rigid body can be reduced to a Preliminary Questions on a rigid body can be reduced to a ___ . A) single force ) single moment B) single moment C) single force and two moments ) single force and a single moment D) single force and a single moment 2. The original force and couple system and an D) single force and single moment equivalent force-couple system have the same _____ effect on a body. B) external School of Engineering, Fall 2009 A) internal B) external C) internal and external D) microscopic

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440:221 Lectures quivalent Systems Equivalent Systems What are the resultant effects on the person’s hand when the load is applied in these two different ways? Why is understanding these difference important when designing various load-bearing structures? School of Engineering, Fall 2009
440:221 Lectures quivalent Systems pplications Equivalent Systems -- Applications Several forces and a couple moment are acting on this vertical section of an I-beam. For the process of designing the I-beam, it would be very helpful if ou could replace the various | | ?? you could replace the various forces and moments as just one force and one couple moment at School of Engineering, Fall 2009 point O with the same external effect? How will you do that?

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implification of a Force and Couple System When a number of forces and ouple moments are acting on a Simplification of a Force and Couple System couple moments are acting on a body, it is easier to understand their overall effect on the body if they are combined into a single force and couple moment having the same external effect. The two force and couple systems are called equivalent systems since they have the same external effect on the body. School of Engineering, Fall 2009
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## This note was uploaded on 09/12/2011 for the course ENG 221 taught by Professor P.sannuti during the Fall '09 term at Rutgers.

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Lecture+10 - 440:221 Intro to Engineering Mechanics:...

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