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ENGR2140 Final Bonus

QuestionAnswer
W-section shape I-beam but flanges are much wider than the beam
What three assumptions must be satisfied in order to apply the bending moment equations discussed in class? - Beam is initially straight and prismatic (uniform cross-section) - Linear stress-strain relationship (Hooke's Law applies) - At least one axis of symmetry
Saint Venant's principle & corresponding assumption Assume that the object is very long compared to its width and that long members are required
Normal strain % elongation along a given axis
Shear strain change in a reference angle
What does it mean for a material model to be elastic perfectly-plastic? The material is assumed to have no residual elasticity after yielding. It still has elasticity, but the stress-strain curve is flat after yield
When could 2d plane stress occur in a 3d solid when a surface element has no external load
Isotropic To possess identical mechanical properties in all directions (yield strength, stiffness (Young's Modulus), toughness)
Axial strain Dimensionless ratio calculated by the change in length over total length
Lateral strain Dimensionless ratio calculated by change in diameter over diameter
Created by: ephemeral
 

 



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