Lecture+21-22

Lecture+21-22 - 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 21 and 22 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 ternal Forces Internal Forces School of Engineering, Fall 2009 2
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440:221 Lectures opics to be covered Topics to be covered • What is a beam? • What are internal forces? • What are internal forces important in structural analysis? School of Engineering, Fall 2009 3
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440:221 Lectures eading Quiz . In a multiforce member, the member is generally subjected to an internal Reading Quiz 1. In a multiforce member, the member is generally subjected to an internal _________. A) Normal force B) Shear force C) Bending moment D) All of the above. D) 2. In mechanics, the force component V acting tangent to, or along the face of, the section is called the _________ . A) Axial force B) Shear force ) Normal force D) Bending moment School of Engineering, Fall 2009 C) Normal force D) Bending moment B)
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440:221 Lectures pplications Beams are structural embers designed to support Applications members designed to support loads applied perpendicular to their axes. Beams are often used to support the span of bridges. They can be thicker at the upports than at the center of supports than at the center of the span. Why are the beams tapered? Internal forces are important in making such a design decision. In this lesson, you will learn about these forces and how determine them School of Engineering, Fall 2009 to determine them.
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440:221 Lectures pplications (cont ) A fixed column supports this ctangular billboard. Applications (cont.) rectangular billboard. Usually such columns are wider/thicker at the bottom than t the top Why? at the top. Why? School of Engineering, Fall 2009
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pplications (cont ) Applications (cont.) The shop crane is used to move heavy machine tools around the shop. The picture shows that an additional
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Lecture+21-22 - 440:221 Intro to Engineering Mechanics:...

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