CHAPTER 6: MECHANICAL PROPERTIES

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• Tensile strain:ENGINEERING STRAINδ/2• Lateral strain:• Shear strain:θ/2δ L /2w oδ/2δ L /2L oπ/2 - θγ = tan θStrain is alwaysdimensionless.π/2θ/28
7.2 STRESS-STRAIN TESTING• Typical tensile specimen• Typical tensiletest machineAdapted from Fig. 6.2,Callister 6e.gaugelength(portion of sample with=reduced cross section)• Other types of tests:--compression: brittlematerials (e.g., concrete)--torsion: cylindrical tubes,shafts.Adapted from Fig. 6.3, Callister 6e.(Fig. 6.3 is taken from H.W. Hayden,W.G. Moffatt, and J. Wulff, TheStructure and Properties ofMaterials, Vol. III, MechanicalBehavior, p. 2, John Wiley and Sons,New York, 1965.)9
Page 2: CHAPTER 7:MECHANICAL PROPERTIESISSU
Page 5 and 6: 7.2 COMMON STATES OF STRESS• Simp
Page 7: OTHER COMMON STRESS STATES• Bi-ax
Page 11: ELASTIC DEFORMATIONS7.3 Stress-stra
Page 14 and 15: c07f08
Page 16 and 17: 7.4 ANESLATICITYAssumed:Time-indepe
Page 18 and 19: E(GPa)10 9 Pa1200100080060040020010
Page 20 and 21: II. MECHANICAL BEHAVIOR—METALS
Page 22 and 23: II. PLASTIC (PERMANENT) DEFORMATION
Page 24 and 25: • YIELD STRENGTH, σ yStress at w
Page 26 and 27: 7.6 TENSILE STRENGTH, TSMaximum pos
Page 28 and 29: 7.6 DUCTILITY, %ELDegree of plastic
Page 30 and 31: Stress-strain of iron at several te
Page 32 and 33: 7.6 TOUGHNESS• Ability to absorb
Page 34 and 35: 7.7 True stress & strainHARDENING:
Page 36 and 37: 7.8 Elastic Recovery After Plastic
Page 38 and 39: III. MECHANICAL BEHAVIOR—CERAMICS
Page 40 and 41: 7.11 Elastic Behavior (forceramics)
Page 42 and 43: IV MECHANICAL BEHAVIOR—POLYMERS7.
Page 44 and 45: 7.14 Macroscopic DeformationSemicry
Page 46 and 47: 7.15 Viscoelasticity DeformationLoa
Page 48 and 49: Polystyrene configurationsAlmost to
Page 50 and 51: c07tf05
Page 52 and 53: c07tf06b
Page 54 and 55: Correlation between Hardness and Te
Page 56 and 57: 7.18 Tear Strength & Hardness of Po
Page 58 and 59:
7.20 DESIGN/SAFETY FACTORS• Desig
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CHAPTER 6: MECHANICAL PROPERTIES

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