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Difficulty: EasyTypes of Stress and Strain

Two overlapping steel plates are fastened together by a single rivet. If opposing lateral forces pull the two plates in opposite directions away from each other, what type of internal stress is primarily experienced by the rivet?

  1. Shear stressAnswer
  2. B
    Tensile stress
  3. C
    Compressive stress
  4. D
    Torsional stress

Answer

Shear stress
The forces from the plates act in parallel but opposite directions across the cross-section of the rivet. This attempts to slide the top half of the rivet off the bottom half, which perfectly describes shear stress (similar to how a pair of shears cuts paper).

Step-by-Step Solution

1
Analyze the direction of the external forces acting on the joint.
The plates are being pulled in opposite directions, parallel to their mating surfaces.
Identifying the force vectors is necessary to determine how they interact with the fastener.
2
Determine how these forces translate to the rivet.
The top plate pushes against the top half of the rivet in one direction, while the bottom plate pushes against the bottom half in the opposite direction.
This cross-sectional cutting action defines the type of stress on the internal component.
3
Match the physical action to the definition of structural stresses.
Forces causing internal layers of a material to slide past each other create shear stress.
Applying the standard definition of shear stress in mechanical systems yields the final answer.

Key Concept

Types of Stress and Strain
Estimated Time:30s
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Topics

Types of Stress and Strain

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