Accession Number : AD0475040


Title :   THE BEHAVIOR AND DESIGN OF BRITTLE STRUCTURES.


Descriptive Note : Final rept. 15 Jan 64-15 Jul 65,


Corporate Author : IIT RESEARCH INST CHICAGO IL


Personal Author(s) : Barnett, Ralph L ; Costello, James F ; Hermann, Paul C ; Hofer, Kenneth E , Jr


Report Date : Sep 1965


Pagination or Media Count : 240


Abstract : A re-examination of the weakest link hypothesis led to the establishment of a conservative design and analysis capability which is applicable to any isotropic brittle material. Associated with this capability are several new fundamental approaches including statistical estimation theory and proof testing which are thoroughly exploited in this report. An improved data base is established for further work in statistical fracture theory through the use of a 'nine element study' involving two thousand hydrostone plaster specimens. A number of techniques were developed to extend the scope of our design algorithm to include thermal shock and random loading problems. Preliminary elevated temperature data were obtained for alumina and titanium diboride. (Author)


Descriptors :   *REFRACTORY MATERIALS , *BRITTLENESS , *CERAMIC MATERIALS , MATHEMATICAL PREDICTION , STRUCTURAL PROPERTIES , STATISTICAL ANALYSIS , FRACTURE(MECHANICS) , FAILURE(MECHANICS) , LOADS(FORCES) , THERMAL STRESSES , MODEL TESTS , ISOTROPISM , ALUMINUM COMPOUNDS , OXIDES , TITANIUM COMPOUNDS , BORIDES , HIGH TEMPERATURE , LEADING EDGES , AEROSPACE CRAFT


Subject Categories : Ceramics, Refractories and Glass
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE