Define shear strength and indicate where this property is critical.

Define shear strength and indicate where this property is critical.

• A. The maximum tensile strength a material can withstand.
• B. The maximum shear stress a material can withstand before failure.
• C. The measure of hardness.
• D. The resilience under cyclic loading.

Answer: (B)

Shear strength is the maximum shear stress a material can withstand before it fails. It describes how well a material resists sliding between its layers when a force acts parallel to a surface. This is different from pulling apart (tensile strength) or from hardness or fatigue under cyclic loading. This property is most important where parts are joined and forces try to slide one piece past another—such as bolts and rivets in shear, welded joints, and joints in timber or metal where a load causes sliding across a plane. It also matters in gears, shafts, and other connections that transmit torque, where the interface must resist shear without slipping or breaking.

Shear strength is the maximum shear stress a material can withstand before it fails. It describes how well a material resists sliding between its layers when a force acts parallel to a surface. This is different from pulling apart (tensile strength) or from hardness or fatigue under cyclic loading.

This property is most important where parts are joined and forces try to slide one piece past another—such as bolts and rivets in shear, welded joints, and joints in timber or metal where a load causes sliding across a plane. It also matters in gears, shafts, and other connections that transmit torque, where the interface must resist shear without slipping or breaking.