3.18 Exercises
97
Construct a Mohr’s circle and find the magnitudes and directions of principal
strains.
19. The following strains were measured in a structure during the test by means of
strain gauges
ε 0 = 650 × 10
−6
ε 60 = −200 × 10
−6
ε 120 = 250 × 10
−6
.
Determine the following
(a) Magnitude of principal strains
(b) Orientation of principal planes.
20. Using an equiangular strain rosette, the following strains were measured at a
point in a material.
ε 0 = 600 µm/ms, ε 60 = −200 µm/m, ε 120 = 300 µm/m.
Calculate the magnitudes and directions of principal strains.
97
Construct a Mohr’s circle and find the magnitudes and directions of principal
strains.
19. The following strains were measured in a structure during the test by means of
strain gauges
ε 0 = 650 × 10
−6
ε 60 = −200 × 10
−6
ε 120 = 250 × 10
−6
.
Determine the following
(a) Magnitude of principal strains
(b) Orientation of principal planes.
20. Using an equiangular strain rosette, the following strains were measured at a
point in a material.
ε 0 = 600 µm/ms, ε 60 = −200 µm/m, ε 120 = 300 µm/m.
Calculate the magnitudes and directions of principal strains.