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عدد المساهمات : 19002 التقييم : 35506 تاريخ التسجيل : 01/07/2009 الدولة : مصر العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
| موضوع: كتاب An Engineering Companion to the Mechanics of Materials - A Systems Approach الجمعة 12 نوفمبر 2021, 12:42 am | |
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أخواني في الله أحضرت لكم كتاب An Engineering Companion to the Mechanics of Materials - A Systems Approach Christopher H. Jenkins, Sanjeev K. Khanna Mechanical & Industrial Engineering Department Montana State University
و المحتوى كما يلي :
CONTENTS Preface . ix Chapter 1 Fundamentals 1 Learning objectives . 1 Clarifications 1 Importance 1 1.0 Representative Problems . 2 1.1 Mechanics and materials 2 1.2 Loads and Structures 3 1.3 Strength and Stiffness . 16 1.4 Modeling and Analysis . 18 1.5 Structural Design . 20 1.6 C3 Clarified 24 1.7 Developing Engineering Intuition 25 1.8 Resources . 27 Chapter 2 Basic Structures Level I 29 Learning objectives . 29 Clarifications 29 Importance 29 2.0 Representative Problems . 30 2.1 Definitions . 32 2.2 Geometry, Boundary Conditions, and Loads 38 2.3 Equilibrium under Simple Loading 46 2.4 Uniaxial Material Response 57 2.5 Structural Design . 64 2.6 C3 Clarified 73 2.7 Developing Engineering Intuition 75 Chapter 3 Basic Structures Level II . 77 Learning objectives . 77 Clarifications 77 Importance 77x CONTENTS 3.0 Representative Problems 79 3.1 Body Loads and Axial Response . 80 3.2 Equilibrium under General Loading I . 83 3.3 Flexural Structure Deformation I 94 3.4 Material Response in Flexure . 98 3.5 Flexural Structure Deformation II . 101 3.6 Structural design . 106 3.7 C3 Clarified . 112 3.8Developing Engineering Intuition 114 Chapter 4 Basic Structures Level III . 115 Learning objectives 115 Clarifications . 115 Importance 115 4.0 Representative Problems 117 4.1 General State of Stress and Strain 118 4.2 Analysis of Thin-Walled Torsion Structures 128 4.3 Three-Dimensional Stress-Strain Relationship . 138 4.4 Combined Axial, Torsional and Flexural Loading 145 4.5 Structural Design under Combined Loading . 164 4.6 Design III 170 4.7 C3 Clarified . 174 Appendices A1. System of Units 177 A2. Free Body Diagrams . 179 A3. Centroid and Second Moment of Area 181 A4. Sign Conventions in Mechanics of Materials . 185 A5. Vectors and Tensors 195 Index 201 Index American Institute for Steel Construction (AISC), 17 Area moment of inertia, 42 Areas, sign conventions, 190 Axial structures, 32–37 compact compressive, 33 constitution, 58–59 equilibrium, 48–52 geometry and boundary conditions, 38–39 strength, 60–61 Beams, 8, 35 beam-column, 84 bending sign conventions, 192–193 cantilever, 37 prismatic, 42 Bending moment, 35 Basis vector, 197 Biaxial stress field, 168 Body loads, 3 and axial response, 80–83 Boundary conditions, 9–14 axial structure, 38–39 flexural structure, 42–45 torsion structure, 39–41 Buckling slender compressive axial structure, 33 Cables, 8 Cantilever beams, 37 Carrying loads, 5 Cartesian stress components, 174 Cauchy’s Stress Principal, 49, 50 Centroid, 183–184 Circular bending, 104 Co-axial loading, 45 Combined axial and flexural loading, 92–94 Combined loading stress analysis for, 145–151 structural design under, 164–169 Compact compressive axial structure, 33 Constitution axial structure, 58–59 flexural structure, 98–99 Coordinate degree of freedom (CDOF), 38, 40, 43 Coordinate sign convention, 188 Couple, 175 Crane(s) failure, 78 types of, 78 Deformation, 18–19, 124 elastic, 60 flexural structure, 94–98, 101–106 inelastic, 165 plastic, 165 stress/strain effects on, 127–128 uniaxial, 57–58 Density, 15, 24–25 Determinacy, 9–14 Direct stiffness method, 19 Displacement, 124 Dynamic loads, 4 Elastic curve, 101 Elastic deformation, 60 Elastic material, three-dimensional, 138–142 Elastic modulus, 59 Energetics, 142–145 Equilibrium, 2, 18, 20–23 axial structure, 48–52 flexural structure, 55–56, 83–92 global versus local, 73–74 under simple loading, 46–56202 INDEX stress/strain effects on, 127–128 torsion structure, 52–55 Euler-Bernoulli assumptions, 94–95 Experimental analysis, 19 Factor of safety (FS), 17, 64 Finite element method, 19 First moment of area, 183 Flexural energetics, 99–100 Flexural structures, 35–37 constitution, 98–99 deformation, 94–98, 101–106 equilibrium, 55–56, 83–92 geometry and boundary conditions, 42–45 Forces sign conventions, 188–190 Free body diagram (FBD), 19, 48, 55, 86, 87, 90, 181–182, 193–194 Gravity loads, 80–83 Hooke’s Law, 59, 63, 98–99, 113, 138 Hyatt Regency walkway collapse, 29 Inelastic deformation, 165 Inertia, 184 Kinetic energy, 61 Lagrangian mechanics approach, 61 Line-forming elements (LFEs), 6–8 Line load, 24 Load(s/ing), 45–46 body, 3 carrying, 5 co-axial, 45 dynamic, 4 gravity, 80–83 line, 24 orientation of, 4, 5 path, 25–27 point, 24 simple, 45, 46–56 static, 3–4 steady-state, 4 structural, 3–5 surface, 3 transient, 4 transverse, 35 Load and resistance factor design (LRFD), 17 Mass, 15–16 Materials, properties of, 14–16 Materials science, 2 Maximum moment from beam theory, 89 by statics alone, 86–89 Maximum shear stress theory, 166–169 Mechanics, 2 Mechanics of materials, 24 sign conventions in, 187–195 Modulus of toughness, 144 Mohr’s circle, for plane stress problems, 151–160 Moment of inertia (MOI), 73, 184–185 Moments, 174–175 diagram, 86 sign conventions, 188–190 Multi-axial stresses, yielding under, 164–165 Newtonian mechanics, 19 Normal force, 121 Normal strain, 124–125 Normal stress, 190 Oblique plane, stresses on, 148 Parallel Axis Theorem, 184 Plane stress, 146 problems, Mohr’s circle for, 151–160 stress transformation in, 147 in three-dimensional stress state, 161–164INDEX 203 Plastic deformation, 165 Plates, 8 Point load, 24 Polar moment of inertia, 39, 54 Position vector, 197 Potential energy, 61 Primary structure, 1 Principal normal stress, 149 Principle of minimum potential energy, 63 Principle of superposition, 5, 144 Prismatic beams, 42 Representative problems, 2 Rods, 8 Secondary structure, 1 Second moment of area (SMoA), 73, 184–185 Shear deformation, 105 diagram, 86 flow, in thin-walled torsion structures, 129–131 force, 74, 121 strain, 125–126 stress, 50, 191 Shell, 8 Sign conventions in mechanics of materials, 187–195 areas, 190 coordinate sign convention, 188 forces and moments, 188–190 stress sign convention, 190–195 Simple loading, 45 equilibrium under, 46–56 Slender compressive axial structure, 33 Static loads, 3–4 Steady-state loads, 4 Stiffness, 16–17, 58 Strain, 46 at a point, general states of, 124–127 effects on equilibrium and deformation, 127–128 energy, 61, 142–145 energy density, 143–145 engineering, 57, 59 extensional, 96 measurement of, 74 normal, 124–125 shear, 125–126 Strain-curvature relationship, 97, 101 Strain–displacement relation, 57 Strength, 16–17 design problems, 30–31 Stress, 46, 175 analysis, for combined loading, 145–151 at a point, general states of, 118–124 Cartesian components of, 122 effects on equilibrium and deformation, 127–128 engineering, 59 failure, 60 invariants, 161, 162 measurement of, 74 normal, 50, 190 shear, 50, 191 sign convention, 190–195 vector, 74 yield, 166 Stress-couple, 101 Stress–strain relations, 19 Structural analysis characteristic tasks in, 18 methods of, 18–20 Structural design, 20–23, 64–73 stiffness, 106–112, 113 Structural elements, 7 Structural loads, 3–5 Structure(s), 3, 24 axial. See Axial structures definition of, 1 flexural. See Flexural structures primary, 1 secondary, 1 taxonomy of, 5–8 torsion. See Torsion structures204 INDEX Superposition, principle of, 5, 144 Surface-forming elements (SFEs), 7, 8 Surface loads, 3 System of units, 177–179 Tacoma Narrows Bridge, torsion collisions of, 35 Taxonomy of structures, 5–8 Tensors, 46, 121, 200–201 strain, 127 Thin-walled torsion structures, 128–137 closed cross-section, shafts of, 131–134 open cross-section, shafts of, 136–137 shear flow in, 129–131 torsional shape factor, 134–135 Three-dimensional stress–strain relationship, 138–145 elastic material, 138–142 energetics, 142–145 Torque, 174–175 Torsional shape factor, 134–135 Torsion constant, 132 Torsion structures, 34–35 equilibrium, 52–55 geometry and boundary conditions, 39–41 Traction vector, 74 Transient loads, 4 Transverse load, 35 Two concentrated loads, 90–92 Uniaxial deformation, 57–58 Uniaxial energy, 61–64 Uniaxial material response, 57–64 axial structure constitution, 58–59 axial structure strength, 60–61 uniaxial deformation, 57–58 uniaxial energy, 61–64 Unit vector, 197 Vectors addition of, 198 basis, 197 definition of, 197 multiplication by scalar, 198–199 position, 197 product of two vectors, 200 subtraction of, 198 unit, 197 Volume force, 74 Weight, 15 Yielding criteria, 165–166 under multi-axial stresses, 164–165 Yield stress, 166
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