Given your understanding of what initiates and controls failure in materials, which of the following will reduce the failure strength or lifetime of a test piece and why? (more than one answer is possible for this question. marks will only be awarded for the question if all the correct options are selected (i.e. 'all or nothing' marking scheme). a. Increasing its volume, greater likelihood of critical defects b. C. Decreasing the grain size, more grain boundaries to initiate failure ☐ d. Decreasing the loading frequency, the material will be at peak stress values for longer e. Increasing the difference between the maximum and minimum stress values, as this affects the stress concentration factor Raising the temperature above the BDTT, more plastic deformation in the lattice will cause it to fail faster

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Given your understanding of what initiates and controls failure in materials, which of the following will reduce the failure strength or lifetime of a
test piece and why?
a.
(more than one answer is possible for this question. marks will only be awarded for the question if all the correct options are selected (i.e. 'all or
nothing' marking scheme).
b.
LUS
C.
d.
Increasing its volume, greater likelihood of critical defects
Decreasing the loading frequency, the material will be at peak stress values for longer
Decreasing the grain size, more grain boundaries to initiate failure
Increasing the difference between the maximum and minimum stress values, as this affects the stress concentration factor
Recent M
Raising the temperature above the BDTT, more plastic deformation in the lattice will cause it to fail faster
G
Transcribed Image Text:Given your understanding of what initiates and controls failure in materials, which of the following will reduce the failure strength or lifetime of a test piece and why? a. (more than one answer is possible for this question. marks will only be awarded for the question if all the correct options are selected (i.e. 'all or nothing' marking scheme). b. LUS C. d. Increasing its volume, greater likelihood of critical defects Decreasing the loading frequency, the material will be at peak stress values for longer Decreasing the grain size, more grain boundaries to initiate failure Increasing the difference between the maximum and minimum stress values, as this affects the stress concentration factor Recent M Raising the temperature above the BDTT, more plastic deformation in the lattice will cause it to fail faster G
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