1
, Chapter Outline
Terminology for Mechanical Properties
The Tensile Test: Stress-Strain Diagram
Properties Obtained from a Tensile Test
True Stress and True Strain
The Bend Test for Brittle Materials
Hardness of Materials
, Questions to Think About
• Stress and strain: What are they and why are they
used instead of load and deformation?
• Elastic behavior: When loads are small, how much
deformation occurs? What materials deform least?
• Plastic behavior: At what point do dislocations
cause permanent deformation? What materials are
most resistant to permanent deformation?
• Toughness and ductility: What are they and how
do we measure them?
• Ceramic Materials: What special provisions/tests
are made for ceramic materials?
3
, Stress-Strain Test
specimen
machine
4
, Chapter Outline
Terminology for Mechanical Properties
The Tensile Test: Stress-Strain Diagram
Properties Obtained from a Tensile Test
True Stress and True Strain
The Bend Test for Brittle Materials
Hardness of Materials
, Questions to Think About
• Stress and strain: What are they and why are they
used instead of load and deformation?
• Elastic behavior: When loads are small, how much
deformation occurs? What materials deform least?
• Plastic behavior: At what point do dislocations
cause permanent deformation? What materials are
most resistant to permanent deformation?
• Toughness and ductility: What are they and how
do we measure them?
• Ceramic Materials: What special provisions/tests
are made for ceramic materials?
3
, Stress-Strain Test
specimen
machine
4
