材料力学
节选
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《材料力学》是“十一五”国家级规划教材。内容有轴向拉伸与压缩，剪切与挤压，扭转，弯曲内力，弯曲应力，弯曲变形，应力应变变换与强度理论，组合变形，能量法，压杆稳定；在附录中有截面图形几何性质及型钢表。书中的例题较多，形式新颖；英语表述流畅。《材料力学》主要作高等学校材料力学双语教学的教科书，也可作研究生及工程技术人员的参考书。
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相关资料
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插图：1.1 THE TASK OF MECHANICS OF MATERIALSIn engineering practice, we are always dealing with structures. There are many examples of structures such as buildings, bridges, airplanes, boats, vehicles, trains and all kinds of machines. Structures are quite different in type, but they have a common character that all structures bear loads. For example, buildings bear wind toad, seismic load, and load from residents. Bridges carry wind load, earthquake load and the load from vehicles. Vehicles carry the load from tourists, etc. Structures consist of several main portions called members such as rods, beams, columns, plates, shells, shafts, bolts, wheels etc. In civil engineering, these members are called structural components, while in mechanical engineering, they are called component parts.MeChanics of materials studies members. Let us see what kind of requirements they should meet when members are working. First of all, they can not be broken otherwise the structures including these members will collapse. Bridges can not be damaged when vehicles are running on them. When a lathe is processing parts, its shafts can not be broken. If such things happen, disastrous consequences will occur. In other words, members have to have enough strength to bear the loads safely. Second, deformation or deflection of members should be limited within some allowable ranges. For example, the deflection of a crane beam should not be too large otherwise the card on the beam will be driven with difficulty. If the principal shaft of a lathe has large deformation, the accuracy of the parts being processed will not be guaranteed. That is, the members should have enough stiffness to resist deformation.The third, members have to have stability. Right now, we are not able to give the definition of stability, but we can give an example. We take a slender column with a compressive force exerted on top of it. If the force is sufficiently large, the column will bend. That is, the equilibrium state of the column with a straight-line shape becomes unstable, or the column loses its stability. Stability is also an important requirement for members. If a column of a building loses its stability, the building will collapse, the consequence is also catastrophic.
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本书特色
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《材料力学》是普通高等教育“十一五”国家级规划教材，高等学校双语教学课程教材之一。
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目录
LIST OF SYMBOLSSI Units1 Introduction1.1 The Task of Mechanics of Materials1.2 Basic Assumptions of Deformable Solid Bodies1.3 Geometrical Characteristics of the Members1.4 Analysis of Internal Forces; Stress1.5 Basic Forms of Rod Deformation2 Axially Loaded Bars2.1 Introduction2.2 Internal Forces2.3 Stresses on Cross-sections and Oblique-sections 2.4 Axial Deformation; Normal Strain2.5 Stress-strain Diagram in Tensile Test2.6 Stress-strain Diagram in Compressive Test2.7 Deformations of Rods under Axial Loading; Hooke’s Law2.8 Allowable Stress; Factor of Safety2.9 Statically Indeterminate Problems2.10 Problems Involving Manufacture Errors and Temperature Changes2.11 Stress Concentrations Problems3 Shearing and Bearing3.1 Introduction3.2 Shear Stress3.3 Bearing Stress Problems4 Torsion4.1 Introduction4.2 Torsion of Circular Shafts4.3 Design of Transmission Shatts4.4 Angle of Twist in the Elastic Range; Design of Transmission Shafts for Stiffness 4.5 Statically Indeterminate Shafts4.6 Torsion of Noncircular Members4.7 Thin-walled Hollow Shafts Problems5 Shear and Moment in Beams5.1 Introduction5.2 Supports and Loads5.3 Shear and Bending-moment Diagrams5.4 Relations among Load, Shear, and Bending Moment5.5 Moving Loads5.6 Internal-Force Diagrams of Rigid Frames and Curved Bars Problems6 Stresses in Beams 6.1 Introduction 6.2 Bending Stresses in Prismatic Beams in Pure Bending6.3 Economic Sections6.4 Shear Stress in Beams6.5 Design for Flexure and Shear6.6 Design of Fasteners in Built-up6.7 Shear Flow in Thin-Walled Beams6.8 Shear Center6.9 Unsymmetrical Bending6.10 Beams of Constant Strength Problems7 Deflection of Beams7.1 Introduction7.2 Equation of the Elastic Curve; Double Integration Method7.3 Method of Superposition7.4 Statically Indeterminate Beams7.5 Deflection of Beams in Unsymmetric Bending Problems8 Transformations of Stress and Strain8.1 Introduction8.2 Preliminary Discussion of Transformation of Stress8.3 Transformation of Plane Stress8.4 Mohr’s Circle for Plane Stress8.5 Absolute Maximum Shear Stress8.6 Theories of Failure8.7 Transformation of Strain; Mohr’s Circle for Strain8.8 The Strain Rosette8.9 Multiaxial Loading; Generalized Hooke’s Law Problems9 Stresses due to Combined Loads9.1 Introduction9.2 Thin-Walled Pressure Vessels9.3 Combined of Axial and Lateral Loads9.4 Eccentric Axial Loading9.5 Combination of Torsion and Bending; Design of Transmission Shafts Problems10 Energy Method10.1 Introduction10.2 Strain Energy and Strain Energy Density10.3 Impact Loading10.4 Design for Impact Loading 10.5 Work and Energy under Several Loads; Maxwell’s Reciprocal Theorem10.6 Castigliano’s Theorem 10.7 Statically Indeterminate Structures Problems11 Columns11.1 Introduction11.2 Euler’s Formula for Pin-Ended Columns11.3 Extension of Euler’s Formula to Columns with Other End Conditions11.4 Applicability of Euler’s Formula; Critical Stress Diagram11.5 Discount-Coefficient Method11.6 Optimization of Column Design for StabilityProblemsAppendix A Moments of AreasA.1 First moment of an area; CentriodA.2 Determination of the first moment and centroid of a composite areaA.3 Second moment, or moment of inertia, of an area; Radius of gyrationA.4 Parallel-axis theoremA.5 Determination of the moment of interia of a composite areaA.6 Product of inertia for an areaA.7 Moments of inertia for an area about inclined axesA.8 Mohr’s circle for moments of inertia ProblemsAppendix B Typical Properties of Selected Materials Used in EngineeringAppendix C Properties of Rolled-Steel Shapes ANSWERS
封面
书名:材料力学
作者:李尧臣
页数:413页
定价:¥47.0
出版社:同济大学出版社
出版日期:2010-07-01
ISBN:9787560842356
PDF电子书大小:77MB 高清扫描完整版