Test Your Fatigue Knowledge

Did you know that the number of structural failures due to fatigue is much larger than due to static overload? Managing and preventing problems due to metal fatigue should be considered a key capability of a structural engineer. Do you want to know how your fatigue knowledge is? Do the Fatigue Knowledge Test.

1 / 8

What is the effect of notches compared to unnotched material?

Lower fatigue strength and unchanged tensile strength.

Lower fatigue strength and lower tensile strength.

Unchanged fatigue strength and unchanged tensile strength.

2 / 8

What is the stress concentration factor of a circular hole in an infinite sheet under tension?

2.5

2.73

3.0

3.36

4.0

3 / 8

What is decisive for fatigue?

Mean stress

Stress amplitudes

4 / 8

Fatigue cracks initiate much easier at the surface than in the core of a material.

True

False

5 / 8

Fatigue failures are characterized by a large amount of plastic deformation.

True

False

6 / 8

What is the effect of mean stresses on the fatigue limit?

The fatigue limit decreases with increasing mean stress

The fatigue limit increases with increasing mean stress

There is no effect

7 / 8

The stress concentration factor of a hole in a finite width sheet loaded in tension is larger than the stress concentration factor in an infinite sheet.

True

False

8 / 8

Compressive residual stresses at a critical location are favourable for the fatigue behaviour.

True

False

Your score is

Are you happy with the result or are you disappointed? We offer courses to improve your fatigue knowledge. Have a look at the Fatec Academy.