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ME 154
Mechanical Engineering Design
Course Outline
Weekly Topics
- Course organization, Introduction, Linkages, Degree of freedom, Kinematics
pairs, Design project discussion. (Ch 1&2 in DOM)
- 4-Bar mechanism, mechanism classification, transmission angle, graphical
synthesis; Motion generation mechanism (two & three positions), mechanical
advantage, toggle positions. (Ch 3 in DOM)
- Graphical synthesis: Path generation mechanism (three positions), synthesis
with prescribed timing, adding Dyad to mechanism, synthesis of a quick-return
mechanism. (Ch 3 in DOM)
- Analytical synthesis: complex polar notation, closed loop vector equation,
motion generation mechanisms (two to five position). Design project
discussion. (Ch 4&5 in DOM)
- Analytical synthesis: function & path generation mechanisms, analytical
analysis; Position, Velocity and Acceleration. Example problems. (Ch 4&5
in DOM)
- Forces on mechanisms: Matrix method, graphical method, project discussion, example problems.
(Ch 6, 7, 11 in DOM)
- Review of stress & strain, principal stresses. (Ch 4 in MD)
- Review of combined stresses: bending, torsion, column design. (Ch 4 in MD)
- Design of thin & thick walled cylinders, press and shrink fits, material
selection for design. (Ch 2&4 in MD)
- SPRING BREAK
- Failure theories for static loads: maximum shear stress theory, the
distortion-energy theory, modified Coulomb-Mohr theory (brittle
materials). (Ch 5 in MD)
- The concept of stress concentration, Failure theory for cyclic loads
(Fatigue), high cycle fatigue; S-N curve. (Ch 4&6 in MD)
- Effect of mean stress on fatigue life (Modified Goodman Diagram), combined
stresses, example problems. (Ch 6 in MD)
- Surface failure, contact stresses, design project discussion. (Ch 7 in MD)
- Bolted joint design: thread standards, stresses, bolt and member stiffness.
(Ch 14 in MD)
- Static & fatigue stress analysis, bolted joints in tensile and shear
loads, bolt preload and torque, design considerations. (Ch 14 in MD). Design project presentation and demonstration, course review - Project
report due date.
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