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1、Chapter 6 Stresses in Beams(Advanced Topics)Mechanics of MaterialsIntroductionWelcome to mechanics of materials.This chapter continues the study of the bending of beams by examining several specialized topics,relating to the analysis and design of composite beams.Firstly,an introduction of this chap
2、ter is given in this section.ReviewsLimitations:isotropic,homogeneous,and linearly elastic materials obeying Hooks law.These specialized topics relating to the analysis and design of composite beams covered in this chapter are based upon the fundamental topics discussed previously in Chapter 5topics
3、 such as curvature,*normal stresses in beams(including the flexure formula),and*shear stresses in beams.*However,these preceding discussion of the bending of beams assumed that the beam is constructed of an isotropic,homogeneous and linearly elastic material which followes Hookes law.Thus,the analys
4、is is highly idealized.Beams need not be composed of one material posite timber-steel beamsHowever,beams need not be composed of one material only,*like a composite steel-wooden beams shown in the picture.Beams are not required to have a plane of symmetry in which transverse loads must be applied.Ae
5、rofoil of Airbus A350And,the beams are not required to have a plane of symmetry in which transverse loads must be applied.*like an non-symmetrical aerofoil of Airbus A350.A more advanced theory is required for analysis and design of composite beams,thin-wall beams,and beams with unsymmetric cross se
6、ctions,those specialized topics will be discussed in this chapter.6.1 Introduction6.2 Composite Beams6.3 Transformed-Section Method6.4 Doubly Symmetric Beams with Inclined Loads6.5 Bending of Unsymmetric Beams6.6 The Shear-Center Concept6.7 Shear Stresses in Beams of Thin-Walled Open Cross Sections
7、6.8 Shear Stresses in Wide-Flange Beams 6.9 Shear Centers of Thin-Walled Open Sections 6.10 Chapter Summary and Review Outline Here is the main topics of this chapter,including a simple introduction for composite Beams,Transformed-Section Method,Doubly Symmetric Beams with Inclined Loads,Bending of Unsymmetric Beams,and the Shear-Center Concept,Shear Stresses in Thin-Walled Beams and Wide-Flange Beams,and Shear Centers of Thin-Walled Open Sections.End of this section.End