Test 1.1 Average stress

Welcome to your ST 1.1 Average stress

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You can measure stress directly with an instrument the way you measure temperature with a thermometer.
There can be only one normal stress component acting on the surface of an imaginary cut.
If a shear stress component on the left surface of an imaginary cut is upward, then on the right surface it will be downward.
If a normal stress component puts the left surface of an imaginary cut in tension, then the right surface will be in compression.
The correct way of reporting shear stress is = 70 kips.
The correct way of reporting positive axial stress is = +15 MPa.
1 GPa equals 106 Pa.
1 psi is approximately equal to 7 Pa.
A common failure stress value for metals is 10,000 Pa.
Stress on a surface is the same as pressure on a surface as both quantities have the same units.

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