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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 Notes on Design Analysis of Machine Element - Douglas Wright السبت 06 يناير 2018, 10:12 pm | |
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أخوانى فى الله أحضرت لكم كتاب Notes on Design Analysis of Machine Element Douglas Wright
ويتناول الموضوعات الأتية :
CONTENTS What is Design ?; why do we design ?; how do we design ?; problem statement; generation of ideas; criteria & con straints; practicalising the candidates; evaluating the candidates; the feasibility study; where do we go from here ?; more advanced considerations. Appendices A - improvement problem; B - tube end problem; C - lessons in frustration; D - analysis of a spring driven vehicle; E - springs as energy stores; F - JCH Roberts on Creativity. STRESS, STRENGTH AND SAFETY Safety factor; stress concentration; static indeterminacy; elementary load building blocks; stress resolution; strain resolution; failure theories; putting it all together; design equations for static shafts; power transmission shafts. Appendix - indeterminate assemblies of multiple components. MISCELLANEOUS STRENGTH TOPICS Castigliano's theorem; thin curved beams; thick curved beams; asymmetric bending; contact stresses. SPRINGS Close coiled round wire helical compression springs; the spring characteristic; stresses & stiffness; buckling; wire materials; presetting; fatigue loading; spring design. Appendix - presetting a torsion bar. THREADED FASTENERS Thread geometry; screw thread mechanics; static failure; loads in an elastic bolted assembly; preload and its con trol; fluid pressurised joints; bolt fatigue; non-uniformly loaded bolt groups. WELDED JOINTS Fillet welded joints; geometric properties of lines; traditional analysis; throat stresses and joint safety; unified anal ysis; resolution. Appendices - the compliant lap joint; extract from AWRA, Technical Note No. 8. CYLINDERS Axial stress; thin cylinders; thick cylinders; design equations; thin cylinder errors; strains; autofrettage; compound cylinders; torsional loading. PRESSURE VESSELS Corrosion; welded joint efficiency; thin shells of revolution - heads; compensation; pipes and flanges; inspection openings; supports; design. SQUIRREL CAGE MOTORS Characteristics of a steady load and of a motor; matching a motor to a given steady load; periodic loading; acceler ation; hydraulic couplings. Appendix - integration in practice. V-BELT DRIVES Overall geometry; kinetics; fatigue; effectiveness; drive selection; approximate solutions; V-flat and pivoted motor drives. Traction mechanics. Appendix - commercial selection tables. BRAKES System dynamics; linings; brake shoe analysis - short translational shoe; long translational shoe; short rotational shoe; shoe figures of merit; long rigid shoe; long hinged shoes; twin shoe brakes. The braked wheel; braking of vehicles; wheel lock - vehicle characteristic; brake control characteristic. SPUR GEARS Overall kinetics of a gear pair; epicyclic trains; conjugate tooth action; the involute tooth; the generation process - tooth systems and profile shift; gear meshing. Gear failure - reliability; tooth forces; bending strength; pitting resis tance; periodic duty. Appendices - continued fractions; geometry of the involute gear tooth. BUCKLING Buckling of thin walled structures; stability of equilibrium; effects of imperfections; submerged pipelines; practical columns - design equations. FRACTURE MECHANICS Fatigue of ductiles; stress concentration; linear elastic fracture mechanics; plasticity; yielding fracture mechanics - the R6 technique; fatigue crack growth. Crack growth kinetics. FINITE ELEMENTS Linear 1-networks; extension to 2- and 3-networks. The Rayleigh-Ritz method. Finite element theory applied to elasticity - equilibrium of the discretised body; element stiffness. Implementation; condensation and bandwidth; discretisation. Appendices - the refining process; 'FEM1' User's Guide. UNITS, DIMENSIONS AND CONVERSION FACTORS
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