Shear Force (Leaving Cert Engineering): Flashcards
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Definition of shear force
Definition of shear force
Two opposing forces acting at different points on a material
Key characteristic of shear force
Key characteristic of shear force
Makes one part of material slide past another part
Type of failure caused by shear force
Type of failure caused by shear force
Sudden and catastrophic failure
Example of shear force
Example of shear force
Scissors cutting paper with opposing blade forces
3 components vulnerable to shear forces
3 components vulnerable to shear forces
Bolts/fasteners, drive shafts, structural joints
Why shear failure is particularly dangerous
Why shear failure is particularly dangerous
Occurs suddenly without warning signs
How materials fail under shear force
How materials fail under shear force
Fracture along line where opposing forces meet
Material selection challenge for shear forces
Material selection challenge for shear forces
Tension/compression performance doesn't predict shear performance
5 main types of forces in engineering
5 main types of forces in engineering
Tension, compression, bending, torsion, shear
What shear force creates internally
What shear force creates internally
Internal stress that can lead to fracture
When shear force causes fracture
When shear force causes fracture
When applied force exceeds material's shear strength
What distinguishes shear from other forces
What distinguishes shear from other forces
Creates sliding action vs uniform direction forces