ENCN221 Engineering Materials Pop Quiz 1| Ques ons
and answers | Updated RATED A+
Force
Interac on between two bodies that when le unopposed will change momentum
Components of Displacement
Rigid body mo on, rota on, deforma on
Deforma on
Changes in distance between material points and changes in angles between material fibres
What does an applied force produce?
A deforma on that is dependent on the geometry of a structure (thickness/length) and its
material
Homogeneous
The same in space - uniform throughout.
Heterogeneous
Different in space - visually dis nguishable components
How to scale force for change in area or length
(control force) x (deltaL) = ((control L/A) / (changed L/A)) x (changed force) x (deltaL)
Generalised formula for force scaling
(control force) x (deltaL) = ((control A) / (changed A)) x (force changed) x ((control L) / (changed
L)) x (deltaL)
Stress (sigma) formula (eng)
sigma = F/Aref
Strain (epsilon) formula (eng)
epsilon = deltaL / L ref
Stress strain rela onship
and answers | Updated RATED A+
Force
Interac on between two bodies that when le unopposed will change momentum
Components of Displacement
Rigid body mo on, rota on, deforma on
Deforma on
Changes in distance between material points and changes in angles between material fibres
What does an applied force produce?
A deforma on that is dependent on the geometry of a structure (thickness/length) and its
material
Homogeneous
The same in space - uniform throughout.
Heterogeneous
Different in space - visually dis nguishable components
How to scale force for change in area or length
(control force) x (deltaL) = ((control L/A) / (changed L/A)) x (changed force) x (deltaL)
Generalised formula for force scaling
(control force) x (deltaL) = ((control A) / (changed A)) x (force changed) x ((control L) / (changed
L)) x (deltaL)
Stress (sigma) formula (eng)
sigma = F/Aref
Strain (epsilon) formula (eng)
epsilon = deltaL / L ref
Stress strain rela onship
