Understanding Stress in Engineering

What is the formula for normal stress in a two-force member under axial loading?

• s = P / A

• s = A / P

• s = P * A

• s = P + A

What is the average shearing stress over a section when equal and opposite transverse forces are applied?

• t_ave = P / A

• t_ave = A / P

• t_ave = P * A

• t_ave = P + A

What is the definition of the factor of safety?

• Factor of safety = ultimate load / allowable load

• Factor of safety = allowable load / ultimate load

• Factor of safety = ultimate load + allowable load

• Factor of safety = ultimate load - allowable load

What happens to the distribution of stresses in a member subjected to eccentric axial loading?

• The distribution is uniform

• The distribution is not uniform

• The distribution is constant

• The distribution is linear

What is the maximum normal stress in a two-force member under axial loading when the angle is zero?

• s_m = P / A_0

• s_m = P * A_0

• s_m = A_0 / P

• s_m = P + A_0

Materials that fail in tension at relatively low values of strain are classified as

• brittle materials
• elastic materials
• composite materials
• ductile materials

Axial elongation of bars loaded in tension is accompanied by lateral contraction; the ratio of lateral strain to normal strain is known as;

• Young's modulus
• Shear modulus
• Poisson's ratio
• Bulk modulus

The factor of safety is established with respect to ________ of the structure.

If a material has the same composition (and hence the same elastic properties) at every point, we call it as:

• anisotropic
• composite
• heterogeneous
• homogeneous