THE FLEXIBILITY OF A TUBULAR WELDED JOINT IN A VEHICLE FRAME

Automotive frames frequently consist of thin-tube members thick enough for much of the structure to be modeled adequately by bar elements. However, previous results show that a typical welded joint cannot be handled by the classical "rigid joint" assumption of frame analysis. Those results include tests of a joint type common in passenger car frames, and establish errors of over 60% in analytical predictions for some of the lower natural frequencies. The present paper attempts to see how much improvement can be achieved by simply accounting for the actual tubular shape in the vicinity of the joint, without allowing for the flexibility of the weld line itself. The study uses the NASTRAN computer program. The joint region is treated as a small substructure in a model otherwise composed of bar elements. This procedure is economical because only those portions which really have to be analyzed using plate elements are so treated.

Media Info

  • Pagination: p. 250-255

Subject/Index Terms

Filing Info

  • Accession Number: 00264154
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 740340Proceeding
  • Files: TRIS
  • Created Date: Dec 31 1974 12:00AM