Week 1: Introduction Flashcards
Where there are three forces, F, G and H, how are these described in their component form in the equilibrium condition?
F + G + H = 0
(ni+nj) + (ni+nj) + (ni+nj) = 0
Online T194 Part 2: Forces Chapter 5
How is the engineer’s theory of bending expressed mathematically?
Where:
M = bending moment
I = second moment of area
E = Young’s modulus
R = radius of curvature
σ = bending stress
y = perpendicular distance of a point in the beam from the neutral axis
What is the equation which relates lateral strain, normal strain and Poisson’s ratio?
ν = -(εy/εx) = -(εz/εx)
Online - Part 1 introduction - Stress and strain - Poisson’s Ratio
Book 1 page 13
By convention, which type of stress is assigned a positive value, and which type of stress is assigned a negative value?
Positive - Tensile
Negative - Compressive
Book 1 page 7
Describe, in words, Poisson’s ratio?
Relates the change in length of a component under load (the normal strain) to the change in width (the lateral strain)
Book 1 page 11
How can the relationship between stress and strain for an axial load be described in each of the three coordinate axes?
Book 1 page 16
