Analytical Evaluation of Concrete Penetration Modeling Techniques

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dc.contributor.advisor Dr. Sami Rizkalla, Committee Member en_US
dc.contributor.advisor Dr. Murthy Guddati, Committee Member en_US
dc.contributor.advisor Dr. Emmett Sumner, Committee Chair en_US Bush, Blake Marshall en_US 2010-04-02T18:04:44Z 2010-04-02T18:04:44Z 2010-02-22 en_US
dc.identifier.other etd-12222009-125512 en_US
dc.description.abstract The resistance of concrete targets to penetration of high speed projectiles is a topic of high value in the national security and catastrophic design fields. Many methods have been developed to effectively analyze these types of problems. Currently there are a number of numerical codes and constitutive models used to analyze concrete impact and penetration with new methods developed continuously. This research evaluates the accuracy of four analysis codes and five concrete constitutive models. Two Lagrangian analysis programs, EPIC and LS-DYNA, as well as an Eulerian code, CTH, are compared in this work. A developmental version of the Material Point Method is also evaluated in order to study the effectiveness of Arbitrary Lagrangian Eulerian (ALE) modeling methods for concrete impact and penetration. The concrete models evaluated in this research include Holmquist Johnson Cook, Brittle Failure Kinetics, Osborn, Karagozian and Case, and Drucker-Prager. The modeling programs and constitutive models are evaluated by comparing simulation results to a series of concrete impact and penetration experiments. The experimental test data, provided by Sandia National Laboratories, comprises concrete targets of two compressive strengths (3.3 and 5.7 ksi) and two thicknesses and projectiles of two nose shapes. Extensive material testing of the experimental concrete is used to calibrate the constitutive models in each analysis package. An additional parametric study investigates the influence of experimental variables on the most promising analytical configuration. Observations from this research show that the EPIC and LS-DYNA analysis codes are currently best suited for concrete impact and penetration problems. Both codes contain features which allow for realistic modeling and produce accurate results for the experimental impact tests. Recommendations for improving analysis methods specific to concrete impact and penetration are presented. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dis sertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject concrete en_US
dc.subject impact en_US
dc.subject analysis en_US
dc.subject modeling en_US
dc.subject penetration en_US
dc.title Analytical Evaluation of Concrete Penetration Modeling Techniques en_US MS en_US thesis en_US Civil Engineering en_US

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