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Zorluk: OrtaTypes of Stress and Strain

Match each mechanical action or scenario to the primary type of internal stress it induces on the object or material.

  • A pneumatic press crushing and flattening a scrap car.Compressive stress
  • A power drill driving a long, thick screw into a wooden beam.Torsional stress
  • A chain hoist suspending a heavy engine block in mid-air.Tensile stress
  • A pair of aviation snips cutting through a sheet of aluminum.Shear stress

Cevap

The pneumatic press causes Compressive stress; the power drill causes Torsional stress; the chain hoist causes Tensile stress; and the aviation snips cause Shear stress.
Each scenario correctly matches the fundamental definition of the applied stress. The press pushes inward (compression), the drill twists the fastener (torsion), the hoist pulls outward on the chain (tension), and the snips cut by applying parallel opposing forces (shear).

Adım Adım Çözüm

1
Analyze the forces acting on the scrap car in the pneumatic press.
The press pushes the car from opposite sides, squeezing it.
Identifying the direction of force determines the stress type. Pushing forces create compressive stress.
2
Analyze the forces on the screw being driven by a power drill.
The drill twists the screw along its longitudinal axis.
Twisting forces create torsional stress.
3
Analyze the forces on the chain hoist suspending the engine block.
The chain is pulled apart by the weight of the engine downward and the support upward.
Pulling forces that stretch an object create tensile stress.
4
Analyze the forces acting on the aluminum sheet when cut by aviation snips.
The blades push the material in opposite directions along a single plane, slicing it.
Parallel opposing forces that cause material to slide or cut create shear stress.

Anahtar Kavram

Different types of mechanical stress are defined by how forces are applied to a material: pulling (tension), pushing (compression), sliding or cutting (shear), and twisting (torsion).
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Konular

Types of Stress and Strain

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