A new multilength scale plate theory with delamination

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Laminated composite plates and shells are potential candidates for many demanding structural applications. A natural choice of analytical/numerical model for the analysis of such structures are equivalent two-dimensional (2D) plate and shell theories. These types of theories provide an efficient and potentially accurate alternative to the use of a three-dimensional finite element (FE) analysis. To effectively model the behavior of composite structures a plate theory must be able to accurately model a variety of inherent history-dependent phenomena. These phenomena include plasticity, viscoplasticity, viscoelasticity, constituent damage within lamina, delamination, and local (sublaminate) and global buckling of the plate. Delamination and local ... continued below

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10 p.

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Williams, T.O. November 1, 1997.

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Laminated composite plates and shells are potential candidates for many demanding structural applications. A natural choice of analytical/numerical model for the analysis of such structures are equivalent two-dimensional (2D) plate and shell theories. These types of theories provide an efficient and potentially accurate alternative to the use of a three-dimensional finite element (FE) analysis. To effectively model the behavior of composite structures a plate theory must be able to accurately model a variety of inherent history-dependent phenomena. These phenomena include plasticity, viscoplasticity, viscoelasticity, constituent damage within lamina, delamination, and local (sublaminate) and global buckling of the plate. Delamination and local buckling operate at length scales on the order of the lamina thickness. The global buckling and overall motion of a plate can be associated with dimensions of the order of the laminate thickness. A new type of laminated plate theory is presented. It is based on a generalized displacement framework obtained from a superposition of global and local displacement fields. The functional forms of the global and local displacements are arbitrary. The theory represents a novel two length scale or local-global approach to plate analysis. The theory incorporates delamination and/or nonlinear elastic or inelastic interfacial behavior in a unified fashion through the use of interfacial constitutive relations. The theory accounts for nonlinearities in the von Karman sense to allow for the analysis of buckling behavior. Thus, the theory represents a general framework for obtaining any order and type of displacement based plate theory in the presence of delamination, buckling, and/or nonlinear material behavior as well as the interactions between these effects.

Physical Description

10 p.

Notes

OSTI as DE98001457

Source

  • 39. AIAA/ASME/ASCE/ASH/ASC structures conference, Long Beach, CA (United States), 20-23 Apr 1998

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  • Other: DE98001457
  • Report No.: LA-UR--97-3307
  • Report No.: CONF-980419--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 642752
  • Archival Resource Key: ark:/67531/metadc695878

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  • November 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • May 5, 2016, 7:38 p.m.

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Williams, T.O. A new multilength scale plate theory with delamination, article, November 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc695878/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.