WorksheetsMaterial Indices (4 Questions)
Total questions: 4
Worksheet time: 4mins
The purpose of a material index is to ?
Confuse Students
Apply constraints to material selection in the Screening Stage
Select the correct ratio of two or more properties for the Ranking stage
Specify design dimensions
A suitable material index for strength limited design for an Elastic Hinge is,,?
Young's Modulus / Density
Yield Strength / Density
(Young's Modulus)1/2 / Density
Yield Strength / Young's Modulus
Rearrange the correct material index for a Strength limited Design for a Diaphragm. Then specify the y-axis & x-axis properties, and the slope of the material index line to maximise this ratio
Yield strength (y), Young's Modulus (x), 0.666 (slope)
Ultimate tensile strength (y), Young's Modulus (x), 1.5 (slope)
Young's Modulus (y), yield strength (x), 1.5 (slope )
Yield strength (y), Young's Modulus (x), 1.5 (slope)
CFRP has a fatigue strength of 225 MPa and a density of 1550 kg/m3. Its index value in a strength limited design, if acting as a beam in bending with section area free is ;
0.145
0.024
145,161
2.17
