[
    {
        "id": "authors:742vy-xfe40",
        "collection": "authors",
        "collection_id": "742vy-xfe40",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150505-155152527",
        "type": "publication_deliverable",
        "title": "Hydrostatic Tensile Fracture of a Polyurethane Elastomer",
        "author": [
            {
                "family_name": "Lindsey",
                "given_name": "Gerald H.",
                "clpid": "Lindsey-G-H"
            }
        ],
        "abstract": "The investigation of fracture of polymeric materials in\nhydrostatic tensile fields constitutes an avenue of approach to the study of fracture in more general three-dimensional environments. The advantages created by the symmetry of the stress field are considerable and, in one of the cases studied, facilitates a theoretical\ntreatment that includes large deformations, which are\ncharacteristic of this class of materials.\n\nThe analysis is developed through the concept of fracture\noriginating from a flaw, which in this instance is taken to be a spherical cavity. Through the application of energy principles, a theoretical prediction of ultimate strength is made for hydrostatic tensile fields.\n\nExperiments were conducted to demonstrate the existence\nof such flaws and to evaluate the theory. Results of the tests on specimens containing both residual flaws and artificially inserted ones indicate a fundamental difference in behavior as contrasted\nwith cracks.\n\nAn explanation is given linking experimental results and\ntheoretical predictions. It is based on the concept that a flaw \"grows\" in the material under load using the cavity as a nucleating point. Upon this hypothesis is built a theory of rupture in which planar cracks grow radially from the center of the cavity in the form of Saturn-ring cracks.",
        "publisher": "United States Air Force",
        "publication_date": "1966-02"
    }
]