Recently, a pin-and-hanger connection on a heavily traveled truck route in the Midwest showed visual indications of being deficient. The pins in this connection were replaced and field contact ultrasonic inspections were performed on the remaining pin connections. The field inspections indicated that a number of the pins contained cracks and/or significant wear grooves at the pin shear planes. These pins were replaced and were sent to the Federal Highway Administration's Nondestructive Evaluation Validation Center for further testing. The testing included further ultrasonic studies using an immersion tank, radiographic studies, and computed tomography. The results of all four types of testing correlated well. The contact and immersion tank ultrasonic studies provided nearly identical results. The radiographic and tomographic investigations also provided conclusive evidence of the location and severity of defects present in the pins. Specifically, two pins were found to contain transverse cracks at the level of a shear plane, with one of these cracks encompassing a majority of the pin cross-section.

  • Availability:
  • Supplemental Notes:
    • This entry in the TRIS database is made from the hardback copy of the conference proceedings, which are also available on CD-ROM.
  • Corporate Authors:

    Technomic Publishing Company, Incorporated

    851 New Holland Avenue, Box 3535
    Lancaster, PA  United States  17604
  • Authors:
    • Graybeal, B A
    • Walther, R A
    • Washer, G A
  • Conference:
  • Publication Date: 2000


  • English

Media Info

  • Features: References;
  • Pagination: p. 261-266

Subject/Index Terms

Filing Info

  • Accession Number: 00793134
  • Record Type: Publication
  • ISBN: 1566769493
  • Files: TRIS, ATRI
  • Created Date: May 8 2000 12:00AM