Title page for ETD etd-06062008-164322


Type of Document Dissertation
Author Lutz, Ernst
URN etd-06062008-164322
Title Design and analysis of a composite wire-socket attachment
Degree PhD
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
Morton, John Committee Chair
Meier, U. Committee Co-Chair
Griffin, Odis Hayden Jr. Committee Member
Henneke, Edmund G. II Committee Member
Johnson, Eric R. Committee Member
Loos, Alfred C. Committee Member
Ragab, Saad A. Committee Member
Keywords
  • Wire.
Date of Defense 1994-10-15
Availability restricted
Abstract

A detailed study of the feasibility of anchoring fiber reinforced plastic wires for civil engineering applications is presented. An experimental investigation using tensile testing machines is performed, testing anchorages of 1, 7 and 19 wires. Conventional strain gage and acoustic emission measurement techniques are used. The tests are essential in determining the failure load and failure mode. However, the experimental data alone do not provide enough information about the behavior of the anchorage to be used exclusively in the design process. The results are used to modify the design of the anchorage system. It is shown that for a successful anchorage system the choice of material for the load transfer medium is crucial. A solution is presented to overcome the high stress concentration at the load entry area of the wire into the anchor.

A finite element analysis of the anchors for 1 and for 19 wires is used to assess the stress and strain fields inside the anchor, to validate the analytical model, and to determine locations of possible high stress concentrations. Three-dimensional and one dimensional models, that utilize axisymmetry, are evaluated. The results of the numerical analysis are used to demonstrate the improvement as a result of a change in material choice or design of the anchor. It is shown that the modification of the load transfer medium results in a decrease of 30 % of the average stress level.

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