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Questions and Answers
Which type of material is not considered a Metallic Material?
Which mechanical property is associated with a material's ability to resist being pulled apart?
Which of the following is not considered a mechanical property of a material?
Which type of force acts in such a way that one piece of the material moves relative to the other?
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Which of the following is considered a Non-Metallic Material?
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What is the formula for tensile stress?
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Which type of stress occurs when the force being resisted acts in the plane of the reacting area?
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What is the formula for average strain?
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What happens to a body when subjected to compressive stress?
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What does strain represent?
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Study Notes
Material Classification
- Non-metallic materials include plastics, ceramics, and composites, which lack metallic bonding and typically exhibit different electrical, thermal, and mechanical properties.
- Examples of non-metallic materials: rubber, glass, and wood.
Mechanical Properties
- The ability to resist being pulled apart is known as tensile strength, which indicates how much force a material can endure before failing.
- Mechanical properties often include tensile strength, compressive strength, ductility, hardness, and elasticity.
Force Types
- Shear force acts to cause layers of material to slide past each other, leading to deformation at an angle to the force applied.
Stress and Strain
- Tensile stress is calculated using the formula: Tensile Stress = Force / Cross-sectional Area.
- Shear stress occurs when applied forces act parallel to the surface of a material.
- Average strain is determined by the formula: Average Strain = Change in Length / Original Length.
Effects of Forces
- A body subjected to compressive stress typically shortens in length, which can lead to buckling or deformation.
- Strain represents the deformation of a material relative to its original length, reflecting how much a material stretches or contracts under applied stress.
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Description
Test your knowledge on the classification of engineering materials into metallic and non-metallic materials, as well as the properties of metallic materials such as physical, mechanical, and chemical properties.
