Out-of-Plane Distortion Crack Growth at a Girder Web Gap (Time-Lapse)

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By Luke Snyder1, Julie Whitehead1, Robert J. Connor1

Purdue University

This video supplements Purdue University's Steel Bridge Research, Inspection, Training, and Engineering (S-BRITE) Center report Fatigue and Fracture Library for the Inspection, Evaluation, and Repair of Vehicular Steel Bridges.

Version 1.0 - published on 03 Jun 2015 doi:10.4231/R7W9573Z - cite this Archived on 25 Oct 2016

Licensed under Attribution 3.0 Unported

Description

This video illustrates the growth of a fatigue crack at a detail susceptible to out-of-plane distortion cracking. (Note: Cracking is not observed until after 70,000 cycles are applied.) As expected, once cracking is initiated, growth is relatively fast and accelerates with extension of the crack. During the test, the detail was cycled both in and out of plane (i.e., the loading produced by the actuator resulted in positive and negative applied stresses at the weld toe.) However, only images that recorded the opening of the crack are used to show the extension of the crack.

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