CTC / MTC 222 Strength of Materials

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CTC / MTC 222Strength of Materials

• Review
• Chapters 1 - 3

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Test 1 10/18/11

• 20 of grade
• Graded on the basis of 20 points in increments of
  ½ point
• Open book plus two sheets of notes
• Equations, definitions, procedures, no worked
  examples
• Work problems on separate sheets of engineering
  paper
• Hand in test paper, answer sheets and notes
  stapled to back of answer sheets
• Will allow 2 hours

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Course Objectives

• To provide students with the necessary tools and
  knowledge to analyze forces, stresses, strains,
  and deformations in mechanical and structural
  components.
• To help students understand how the properties of
  materials relate the applied loads to the
  corresponding strains and deformations.

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Chapter One Basic Concepts

• SI metric unit system and U.S. Customary unit
  system
• Unit conversions
• Basic definitions
• Mass and weight
• Stress, direct normal stress, direct shear stress
  and bearing stress
• Single shear and double shear
• Strain, normal strain and shearing strain
• Poissons ratio, modulus of elasticity in tension
  and modulus of elasticity in shear

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Chapter Two Design Properties

• Basic Definitions
• Yield point, ultimate strength, proportional
  limit, and elastic limit
• Modulus of elasticity and how it relates strain
  to stress
• Hookes Law
• Ductility - ductile material, brittle material

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Chapter Three Direct Stress

• Basic Definitions
• Design stress and design factor
• Understand the relationship between yield stress
  and design stress, allowable stress or working
  stress
• Understand the relationship between design
  factor, factor of safety and margin of safety
• Design / analyze members subject to direct stress
• Normal stress tension or compression, tensile
  stress on gross area, tensile stress on net area
• Shear stress shear stress on a surface, single
  shear and double shear on fasteners
• Bearing stress bearing stress between two
  surfaces, bearing stress on a fastener

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Chapter Three Axial Deformation and Thermal
Stress

• Elastic deformation of a member due to an axial
  load
• Design axially loaded members to limit their
  deformation
• Define coefficient of thermal expansion
• Thermal deformation due to temperature change if
  a member is unrestrained
• Thermal stress in a member due to temperature
  change if the member is restrained
• Stress in components of a composite structure
  made of more than one material