Charles C. Roberts, Jr., Ph.D., P.E.,
( firstname.lastname@example.org) is president of C.
Roberts Consulting Engineers, Inc.,
which provides professional engineering
services in accident reconstruction,
failure analysis, fire causation, explosion
analysis, and biomechanics.
The condition of the mechanical components shown in Figures 2 and 3 is characteristic of fretting fatigue. Fretting fatigue
is wear on a mechanical surface caused
by relative motion (vibration, road condition variation) and drive train loading
that causes micro pitting of the metallic
surfaces, increased roughness and reduction of metal fatigue strength. This occurs
over a period of time and is not the result
of a single incident. This was not a result
of impact with the deer, but a form of mechanical failure.