MF - Chapter 4: Normal Stress Concepts

What is tensile stress?

• Tensile stress is the force per unit area experienced by a material when subjected to a twisting force

• Tensile stress is the pressure experienced by a material when compressed

• Tensile stress is the resistance of a material to bending

• Tensile stress is the force per unit area experienced by a material when subjected to a pulling force.

Define compressive stress.

• Compressive stress is the stress that occurs when an object is being stretched.

• Compressive stress is the stress that occurs when an object is being compressed or squashed.

• Compressive stress is the stress that occurs when an object is at rest.

• Compressive stress is the stress that occurs when an object is twisted.

Explain shear stress.

• Shear stress is the force per unit area that acts parallel to the surface of a material, causing it to deform or slide.

• Shear stress is the force acting perpendicular to the surface of a material.

• Shear stress is only applicable to liquids, not solids.

• Shear stress does not cause any deformation in materials.

How is bending stress defined?

• Tensile stress in a material

• Shear stress in a material

• Internal resistance of a material to deformation under bending moments.

• External resistance to deformation

What is torsional stress?

• Torsional stress is the stress caused by shearing forces acting on an object.

• Torsional stress is the stress caused by twisting forces acting on an object.

• Torsional stress is the stress caused by tensile forces acting on an object.

• Torsional stress is the stress caused by compressive forces acting on an object.

What is the formula to calculate tensile stress?

• Mass / Volume

• Length / Width

• Force / Cross-sectional area

• Pressure / Temperature

How is compressive stress calculated?

• Compressive Stress = Force - Area

• Compressive Stress = Force * Area

• Compressive Stress = Area / Force

• Compressive Stress = Force / Area

What are the units of shear stress?

• Kilograms

• Pascals (Pa) or newtons per square meter (N/m^2)

• Liters

• Meters

How is bending stress measured?

• Bending Stress = (P * L) / A

• Bending Stress = (M * c) / I

• Bending Stress = (F * d) / A

• Bending Stress = (T * r) / J

What factors affect torsional stress?

• Material properties, geometry, applied torque, length

• Temperature, pressure, volume

• Density, viscosity, surface tension

• Speed, acceleration, force