Failure Due To Overload - Chapter 2 Quiz

Overload failure can result in either distortion or fracture depending on the magnitude and type of the applied load.

Distortion is a deformation in the part with separating into pieces..

Fracture is a separation of a body into pieces due to the applied stress..

Elastic deformation occurs when a material is subjected to a load that does not exceed its ultimate strength.

Elastic distortion can be induced by a load and affected by a change in temperature .

Selection of a material with a sufficiently high modulus can prevent elastic deformation, especially in the event of an unexpected change in temperature.

Yielding failure is also known as gross plastic deformation.

Ceramics and very hard metals are inherently ductile materials.

Buckling occurs when a material subjected to tensile or shear stresses can no longer support the load.

Strength and hardness properties indicate a material’s susceptibility to buckling.

Buckling is more likely to occur at lower temperatures where the modulus of elasticity is lower.

Fracture mechanism consists of three steps.

Brittle fracture occurs when mechanical loads exceed a material’s ultimate compressive strength.

Yielding failure is typical in brittle materials such as ceramics and very hard metals.

Buckling may occur in simple shapes such as bars, tubes, and columns but not in complex geometries like I-beams.

Ductile fracture occurs when a material undergoes plastic deformation before the fracture.