Exam 3

Question 1

In regards to stress due to bending, when loads are applied perpendicular to the beam from the top of the part, ______ strain occurs at the top and ______ strain occurs at the bottom.

Answer 1

compressional, tensile

Question 2

In regards to shearing stress in beam, the maximum shearing stress is typically located at _______ of the part.

Answer 2

centroid

Question 3

If the beam is not section is NOT the same distance from the top and bottom surface, the magnitude of the maximum compressive stress would be equal to the maximum compressive stress would be equal to the maximum tensile stress? (True or false) (explain in detail)

Answer 3

False, in the equation sigma=Mc/I the C is the distance to the centroidal axis. So the distance for the top and bottom would be different; therefore, C is different while the M and I are constant. In conclusion, sigma is not equal for compression and tension.

Question 4

shear flow is a measure of

Answer 4

the amount of shear force caused by sliding between two parts. This is resisted by supports such as nails or screws.

Question 5

When the deflection is at the maximum, the slope is equal to 1 (True of false) (Explain in detail)

Answer 5

False; when deflection is at the maximum, the slope is zero. Slope does not have to equal 1 for deflection, but it can.