التصميم الميكانيكي :machine design

من طرف **admin** الأربعاء أبريل 21, 2010 3:18 am

التصميم الميكانيكي
machine design

الرابط التالي لموقع التصميم الميكانيكي مفيد لطلبة الدراسات الهندسية في اختصاص التصاميم وعلى كافة مراحل الدراسة ( البكالوريوس أو الماجستير أو الدكتوراه ) :
يتضمن الموقع :

INTRODUCTION NOMENCLATURE DESIGN
What is Design?; why do we design ?; how do we design -
problem statement, creating a bank of solution candidates, constraints
& criteria, practicalising the candidates, evaluating the
candidates, the feasibility study; where do we go from here?; more
advanced considerations.
Appendices - an improvement problem; analysis of a spring driven vehicle; springs as
energy stores; extract from JCH Roberts, Creativity.
STRESS, STRENGTH AND SAFETY
Safety factor; stress concentration; static indeterminacy; elementary load building blocks; stress & strain resolution; failure theories; putting it all together; design equations for static round shafts; power transmission shafts.
Appendix - indeterminate assemblies of multiple components.

MISCELLANEOUS STRENGTH TOPICS
Castigliano's theorem; curved beams; asymmetric bending;
contact stresses.

SPRINGS
Types of 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 control;
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
analysis; conclusion.
Appendix - the
compliant lap joint.

CYLINDERS
Axial stress; thin cylinders; thick cylinders;
design equations; strains; autofrettage; compound cylinders; torsional
loading.

PRESSURE VESSELS
Corrosion; welded joint efficiency; thin ****ls 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; acceleration; periodic loading.
Hydraulic couplings.
Appendix -
integration in practice.

V-BELT DRIVES
Overall geometry; kinetics; fatigue; drive
selection; effectiveness; approximate solutions; V-flat and pivoted
motor drives. Traction mechanics.
Appendix
- commercial selection tables.

BRAKES
System dynamics; linings. Brake analysis: translating
brakes - short and long shoes; drum brakes - short, long rigid and
hinged shoes; twin shoe brakes. The braked wheel; braking of vehicles;
wheel lock; the vehicle and brake control characteristics.

SPUR GEARS
Overall kinetics of a gear pair; epicyclic trains;
conjugate tooth action; the involute tooth; the generation process -
tooth systems; profile shift; gear meshing. Gear failure - reliability;
tooth forces; bending strength; pitting resistance; varying 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 &
CONVERSION FACTORS
PROGRAM DIRECTORY