Đang chuẩn bị liên kết để tải về tài liệu:
Ebook Mechanics of materials (8th edition): Part 2 - James M.Gere, Bary J.Goodno

(BQ) Part 1 book "Mechanics of materials" has contents: Stresses in beams (advanced topics); analysis of stress and strain, applications of plane stress (pressure vessels, beams, and combined loadings), deflections of beams, statically indeterminate beams, columns, review of centroids and moments of inertia. | 77742_06_ch06_p524-607.qxd:77742_06_ch06_p524-607.qxd 6 2/22/12 7:39 PM Page 524 CHAPTER Stresses in Beams (Advanced Topics) A more advanced theory is required for analysis and design of composite beams and beams with unsymmetric cross sections. (© Can Stock Photo Inc./toneteam) I CHAPTER OVERVIEW In Chapter 6, we will consider a number of advanced topics related to shear and bending of beams of arbitrary cross section. First, stresses and strains in composite beams, that is beams fabricated of more than one material, is discussed in Section 6.2. First, we locate the neutral axis then find the flexure formula for a composite beam made up of two different materials. We then study the transformedsection method as an alternative procedure for analyzing the bending stresses in a composite beam Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. 77742_06_ch06_p524-607.qxd:77742_06_ch06_p524-607.qxd 2/22/12 in Section 6.3. Next, we study bending of doubly symmetric beams acted on by inclined loads having a line of action through the centroid of the cross section (Section 6.4). In this case, there are bending moments (My, Mz) about each of the principal axes of the cross section, and the neutral axis is no longer perpendicular to the longitudinal plane containing the applied loads. The final normal stresses are obtained by superposing the stresses obtained from the flexure formulas for each of the separate axes of the cross section. Next, we investigate the general case of unsymmetric beams in pure bending, removing the restriction of at least one axis of .