The objective of this sensitivity study was to determine the effect of moving the open-hole on frame that had been drilled
close to anexisting bolt (high stress area) further from its initial location in order to determine if main taining a certain
distance from the high stress area will be identified to prevent fatiguefailure.In Fig. 11, description of design iterations
performed for sensitivity study is shown.The frame open-hole was move dalong‘‘X’’ direction in multiple increments and
the distribution of stress concentration near open-hole was studied.It is to be noted that frame holes are often drilled to
mount brackets and for routing of hydraulics and electrical wires.This study helps identify no-drill zone based on both safe
life and fracture mechanic sperspective.