Mechanical Tests and Failure Analysis on Selected Components of the Class 60 Armored Vehicle Launched Bridge (AVLB) During the Class 70 Modification Program 9781423574811

Mechanical Tests and Failure Analysis on Selected Components of the Class 60 Armored Vehicle Launched Bridge (AVLB) During the Class 70 Modification Program

ISBN-10: 1423574818
ISBN-13: 9781423574811
PUBLISHER: Storming Media
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Note: Not guaranteed to come with supplemental materials (access codes, CDs, DVDs)
Product Description: The current Class 60 armored vehicle launched bridge (AVLB), with an overall length of 63 ft, is capable of carrying Class 60 (military load classification MLC - 60 tons) tracked and wheeled loads over a 60-ft-wide gap. The heavier, wider M1A1 main battle tank (Class 70 load) can cross the AVLB over a 50-ft-wide gap with precautions. Several modifications were proposed to upgrade a number of AVLBs from Class 60 to Class 70 for the 60-ft clear span crossings. The objective of the work was to conduct necessary mechanical tests on selected AVLB components to obtain pertinent data to verify their load carrying capability and the proposed modifications. Various AVLB components were cut or removed from several AVLBs as samples for a variety of mechanical and special tests. Special test jigs were designed and built to test the samples of the components on the testing machine. Failure analyses were performed on the components that failed during the special tests or the fatigue tests of the modified AVLBs undergoing the simulated crossings. Two Class 60 AVLBs were converted to Class 70, with extensive modifications to the bottom chords, and then were tested. One of them was deliberately tested to failure by static overloading to observe the mode of failure. The bridge buckled in the top chords at about 190 tons. The modified bottom chords did not fail by cracking, indicating the success of the Class 70 modification program to upgrade the AVLB.

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PAGES: 138

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