| Effects of crack (damage)
patterns of the vibration and Mechanical properties
of components |
Principal
Investigator |
Hamid
Nayeb-Hashemi
Professor
Mechanical and Industrial Engineering |
|
|
Research
Abstract |
Structural components are often subjected to cyclic
loadings and various hazardous environmental conditions.
These loadings and environmental conditions lead to
degradations of these components. The degradation could
be in form of multiple cracks, stress corrosion cracking,
corrosion, etc. The structural integrity of these components
depends on the distribution of these damages throughout
the component. For two damages far apart from each other,
the structural integrity is controlled by the worst
damage. However, for two damages that are close to each
other, the structural property is controlled by both
damages.
In this research we are interested to understand effects
of different crack pattern distributions on overall
structural integrity of the component. Inorder to understand
the effect of damage pattern on the overall structural
integrity of components, various specimens with different
crack patterns will be manufactured. Before conducting
any destructive test, we will investigate the effect
of these patterns on the vibration characteristic of
these components. Destructive test will be followed
upon completion of vibration tests. Furthermore we will
induce identical damage by impacting specimens at different
locations. The material for this part of experiment
will be metal matrix composites. We will try to characterize
damage by using Scanning electron microscope. The effects
of these damages on vibration characteristic, damping
behavior and mechanical properties of components will
be investigated. We will also try to simulate the effect
of these defects on the vibration characteristics of
these components by using commercial software ANSYS. |
| Research
Activities/
Experience |
We will prepare all necessary samples and will
show students how to use equipment. We expect these
students to make a good record keeping of all aspects
of the experimentation. This is extremely important
for good understanding of the subject and our research
results. |
| Helpful
skills or interests |
Laboratory data acquisition, Familiarity with Excel
and MS word is essential. |
Suggested
literature to review prior to program |
Please review some books on mechanical behavior
of material, especially simple tensile tests, and
review some elementary materials on vibration and
damping of the materials. |
Download |
PDF |
