everything.study
2.72

Elements of Mechanical Design

3-3-6 units · Undergraduate

Advanced study of modeling, design, integration, and best practices for use of machine elements, such as bearings, bolts, belts, flexures, and gears. Modeling and analysis is based upon rigorous application of physics, mathematics, and core mechanical engineering principles, which are reinforced via laboratory experiences and a design project in which students model, design, fabricate, and characterize a mechanical system that is relevant to a real-world application. Activities and quizzes are directly related to, and coordinated with, the project deliverables. Develops the ability to synthesize, model and fabricate a design subject to engineering constraints (e.g., cost, time, schedule). Students taking graduate version complete additional assignments. Enrollment limited.

Spring 2009

Topics

  • Principles: overview, assessment, group formation
  • Fundamentals: mechanics, dynamics, heat transfer, matrices, and errors
  • Shafts & ways: deformation, stresses, and integration
  • Fatigue: fundamentals and modeling methods
  • Structures: architectures, homogeneous transfer matrices, and system models
  • Constraints I: constraint-based design, alignment, preloading, and stability
  • Constraints II: rolling and sliding element bearings
  • Constraints III: flexure bearing elastomechanics & dynamics
  • Connections I: alignment interfaces
  • Connections II: bolted joints
  • Drives I: screw drives
  • Gears II: mechanics and selection
  • Actuators: DC motors, piezos, magnet-coil, and hydraulics
  • Actuators: thermal and electrostatic microactuators
  • Vibrations: machine dynamics and damping
  • Linkages: degrees of freedom and kinematics
  • Friction elements: clutches and brakes
  • Project work
  • Project report outline
  • Carriage errors
  • Project report 1 st draft
  • Project report
  • Last day of class overview, demonstrations and assessment

Readings

  • [S&M] = Shigley, Joseph, Charles Mischke, and Richard Budynas. Mechanical Engineering Design . Boston, MA: McGraw-Hill, 2003. ISBN: 9780072921939.
    Listed reading
  • SES #: 4 · TOPICS: Fatigue: fundamentals and modeling methods · READINGS: None
    Reading assignment
  • SES #: 5 · TOPICS: Structures: architectures, homogenous transfer matrices, and system models · READINGS: None
    Reading assignment
  • [S&M], chapter 11
    Listed reading
  • Reading assignment
  • Listed reading
  • Skim the rest of chapter 6
    Listed reading
  • [S&M], chapter 8
    Listed reading
  • SES #: 10 · TOPICS: Connections II: bolted joints · READINGS: [S&M] 8.2
    Reading assignment
  • [S&M], chapters 13 and 17
    Listed reading
  • Skim the rest of chapter 17
    Listed reading
  • [S&M], chapter 14
    Listed reading
  • Skim the rest of chapter 14
    Listed reading
  • SES #: 13 · TOPICS: Gears II: mechanics and selection · READINGS: None
    Reading assignment
  • SES #: 14 · TOPICS: Actuators: DC motors, piezos, magnet-coil, and hydraulics · READINGS: Chen, Skim, Shih-Chi, and Martin L. Culpepper. “Design of a six-axis micro-scale nanopositioner - µHexFlex.” Precision Engineering 30 (2006): 314-324.
    Reading assignment
  • SES #: 15 · TOPICS: Actuators: thermal and electrostatic microactuators · READINGS: None
    Reading assignment
  • SES #: 16 · TOPICS: Vibrations: machine dynamics and damping · READINGS: Skim gear selection reading
    Reading assignment
  • SES #: 17 · TOPICS: Linkages: degrees of freedom and kinematics · READINGS: None
    Reading assignment
  • SES #: 18 · TOPICS: Friction elements: clutches and brakes · READINGS: [S&M] 14.1-14.7, 16.2, 16.6, 16.9
    Reading assignment
  • SES #: 19-25 · TOPICS: Project work · READINGS: None
    Reading assignment
  • SES #: 26 · TOPICS: Last day of class overview, demonstrations and assessment · READINGS: None
    Reading assignment

Prerequisites & course information

Subject meets with 2.720 Prereq: 2.008 and ( 2.005 or 2.051); Coreq: 2.671 U (Spring) 3-3-6 units

Sources