rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Finite element analysis of superplastic metal forming processes
  name:
    name part: Chandrasekaran, Namasivayam
    name part: 1952-
    role:
      role term: creator
  name:
    name part: Allen, D. H.
    role:
      role term: degree committee member.
  name:
    name part: Bradley, W.
    role:
      role term: degree committee member.
  name:
    name part: Goforth, R. E.
    role:
      role term: degree supervisor.
  name:
    name part: Haisler, W. E.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1986
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xii, 128 leaves : illustrations ; 29 cm
  abstract: The commercial development of superplastic materials has provided opportunities for producing complex components using new forming techniques. The available analyses are restricted to specific shapes and other simplified assumptions. There is a great need for a generalized analytical technique which will be independent of material characteristics and geometry, and also flexible enough to accommodate more rigor in the analyses. Finite element displacement method has been used in this research to meet such a strong industrial need. The finite element method involves finite deformations with large rotations of material particles, contact conditions with or without frictional effects, and non-conservative pressure loadings. The contact problem is solved using a new method which is very attractive to metal forming problems. The algorithm imposes geometric constraints on the pseudo equilibrium configuration, defined as a configuration at which the compatibility conditions are violated. The frictional conditions of sticking, slipping, rolling or tension release are determined from the relative magnitudes of the normal and tangential global nodal forces. For problems involving superplastic materials, a finite element equation has been developed based on the principle of virtual work, and is solved using an updated Lagrangian method with velocity as the primary solution variable. Since the sheet metal forming processes feature finite strain accompanied by considerable spin of the principal axes, a rotation-invariant rate of deformation tensor is used in the constitutive equation. The incompressibility condition is imposed through the use of a penalty parameter with integration on the appropriate integrals. The non-conservative pressure loading is evaluated by continually updating the load bearing surface within each load step. Example problems to demonstrate the applicability of the contact algorithm to a range of boundary value problems for a variety of material models, hav…
  note: "Major subject: Mechanical Engineering."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1986
  note: Includes bibliographical references (leaves 116-122).
  subject:
    topic: Finite element method
  subject:
    topic: Sheet-metal
  subject:
    topic: Superplastic forming (Metal-work)
  subject:
    topic: Major mechanical engineering
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-21193
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-21193
  record info:
    record content source: TXA
    record creation date: 880510
    record change date: 20220104090800.0
    record identifier: in00000013252
    language of cataloging:
      language term: eng