Accession Number : AD0766558

Title :   Nonlinear Crack Analysis with Finite Elements.

Descriptive Note : Research rept.,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s) : Armen,Harry , Jr. ; Saleme,Earnesto ; Pifko,Alan ; Levine,Howard

Report Date : JUL 1973

Pagination or Media Count : 49

Abstract : The paper is concerned with the use of finite element methods to provide a reasonably accurate and realistic analytic representation of the nonlinear behavior of arbitrary two dimensional bodies containing cracks. Specific methods are proposed that would provide capabilities necessary to obtain information concerning: An accurate description of the maximum, minimum, and residual near-tip stress and strain fields; The effects of crack closure on the near-tip behavior of the stress and strain field during cyclic loading into the plastic range; The stress-strain and displacement field behavior associated with a nonstationary crack; and the effects of large rotation near the crack-tip. (Modified author abstract)

Descriptors :   (*MATERIALS, CRACKS), (*AIRFRAMES, STRESSES), STRAIN(MECHANICS), PLASTIC PROPERTIES, CRACK PROPAGATION, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL INTEGRATION

Subject Categories : Aircraft
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE