Ratcheting behaviour of aluminum under cyclic axial load
Abstract
An experiment about uniaxial ratcheting of Aluminum was investigated and
particular attention was paid to ratcheting behavior under different cyclic loading. The
effect of amplitude stress and mean stress on the ratcheting behavior of Aluminum
was also analyzed. Before uniaxial ratcheting test is start, a monotonic tension test
will be carried out to determine the stress-strain curve characteristic of Aluminum. A
series of uniaxial ratcheting tests were conducted by cyclic tension at several step of
the maximum to minimum stresses. Three steps for each condition are being done to
review their respect performance in predicting the ratcheting strain measured
experimentally. The uniaxial ratcheting of the material was found to depend strongly
on the value of the mean stress, amplitude stress and on their histories. From the result
obtained, it can be summarize that the ratcheting strain and ratcheting rate of
Aluminum increases with increasing amplitude stress or mean stress correspondingly.