Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

57significant strain damage in the metal. The eyebar was then allowed to cool slowly andthen surface ground to make the filler weld blend into the original eyebar.After surface grinding to a flush condition, Measurements Group CEA-06-250UN-350 type strain gages were placed on both faces of the shank of the eyebarconnections of Eyebars A and B. Figures 3.33 and 3.34 are photographs of the eyebarsafter being surface ground and directly before testing. The same fixture that was utilizedwith the MTS testing machine when testing the eyebar connection that had not beenrepaired was also used in testing Eyebar A and B.This fixture, which consisted of three thick plates that were bolted together, wasplaced in the upper grip of the testing machine. A 2 3 / 16 inch steel pin was placed throughtwo of these plates and hole in the eyebars. The bottom of the eyebar was then placed inthe bottom grip of the MTS testing machine. A two inch extensometer was then attachedat the shank of the eyebar connection above the lower grip with strong elastic bands.Figures 3.35 and 3.36 are front and side view photographs of Eyebar A immediatelybefore testing.The eyebar connections were then tested in the same manner than the eyeconnections that had not experienced any repair. The eye connections were initiallyloaded only in the elastic region of the stress-strain curve. In this test, load was applied ata fixed rate while the amount of strain in the specimen was recorded. The readings fromthe strain gages, extensometer, load cell and stroke were recorded during this test. Thistest was done at a rate of five thousand pounds per minute. The sample was only stresseduntil a stress of 10 ksi or less was reached in the shank of the specimen. This test wascompleted to ensure that the testing and data recording equipment was working properly.After the initial test, both Eyebar A and B were loaded completely until failure.The eye connections were pulled at a constant rate of 1/12 inch per minute until failure.The failure location of the eye connections was recorded along with the strain gage