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Overload failure can result in either distortion or fracture depending on the magnitude and type of the applied load.
True
Distortion is a deformation in the part with separating into pieces..
False
Fracture is a separation of a body into pieces due to the applied stress..
True
Elastic deformation occurs when a material is subjected to a load that does not exceed its ultimate strength.
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Elastic distortion can be induced by a load and affected by a change in temperature .
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Selection of a material with a sufficiently high modulus can prevent elastic deformation, especially in the event of an unexpected change in temperature.
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Yielding failure is also known as gross plastic deformation.
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Ceramics and very hard metals are inherently ductile materials.
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Buckling occurs when a material subjected to tensile or shear stresses can no longer support the load.
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Strength and hardness properties indicate a material’s susceptibility to buckling.
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Buckling is more likely to occur at lower temperatures where the modulus of elasticity is lower.
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Fracture mechanism consists of three steps.
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Brittle fracture occurs when mechanical loads exceed a material’s ultimate compressive strength.
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Yielding failure is typical in brittle materials such as ceramics and very hard metals.
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Buckling may occur in simple shapes such as bars, tubes, and columns but not in complex geometries like I-beams.
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Ductile fracture occurs when a material undergoes plastic deformation before the fracture.
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