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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

Finite element investigation of general yield fracture

Mackay, D. C. January 1983 (has links)
An Updated Lagrangian finite element formulation, valid for the analysis of large deformations in elastic and elasto-plastic materials, is derived and the structure of the associated computer program described. The formulation involves a Jaumann stress rate in the constitutive law. An eight-node isoparametric quadrilateral element is employed together with a procedure which repositions each mid-side node. Solutions to several structural examples are compared with analytical or experimental results. Both plane stress and plane strain conditions are assumed in a detailed study of a centre notch specimen under tensile loading. Comparison of results obtained using small and large strain programs show that the effect of crack tip blunting is greater in plane strain than in plane stress. Two fracture criteria are investigated. The effects of large scale plane strain yielding and crack tip blunting on the theoretical background to a criterion which requires a critical opening at a fixed distance behind the crack tip are assessed. The second criterion, based on the crack separation energy, had been employed previously to reproduce experimental results of stable crack growth despite differences between numerical and theoretical predictions. The present work confirms the theoretical predictions, in particular that the crack separation energy is zero for an infinitesimal crack advance. A mathematical analysis demonstrates that due to special circumstances in the previous numerical calculations, this criterion was in fact equivalent to a strain-related criterion.
72

Influence fields for beam, plate and shell structure

Duncan, B. J. January 1976 (has links)
No description available.
73

A finite element system for analysis and design

Campbell, J. S. January 1975 (has links)
No description available.
74

Quasi-static and dynamic transient nonlinear analysis of plates and arbitrary thin shells by use of the Semiloof element

Dinis, M. M. de J. S. January 1978 (has links)
No description available.
75

The design of syntactic foam structures by finite element analysis

Yeo, M. F. January 1974 (has links)
No description available.
76

Measurement of high temperature creep using Moiré technique

Jones, L. R. January 1971 (has links)
No description available.
77

Finite element analysis of reinforced earth with strip slip

Salem, A.-R. K. January 1979 (has links)
No description available.
78

Mechanical Behaviour of Granular Materials in Simple Shear Test Using DEM

Wang, Jian January 2009 (has links)
No description available.
79

Passive and Active Control of Wind Induced Bridge Vibration

Chang, Kuo-Wei January 2010 (has links)
No description available.
80

Impinging Leading Edge Vortex Induced OsauATiON (ILEVIO) in Bridge Aeroelasticity

Gu, Xiao Han Phrain January 2009 (has links)
No description available.

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