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The effect of chemical exposure on the degradation of material properties is important to material evaluation and selection for both commercial and military products. Described here are a set of enhancements to a traditional chemical-material compatibility database that were required to support the early selection of chemically resistant materials in a concurrent engineering environment. This initial phase in the development of an integrated chemical-material compatibility system included: organization of tests into a comprehensive scheme, test selection for the initial screening tests in the scheme, the increased standardization of test procedures and reports required to support database queries, and the control of data set flow from the test laboratory directly to the database. Emphasized here is the design of modular database files based on material, chemical, and test specification descriptors that are indexed to the resulting test properties database module. ASTM Committee E49 formats were employed where available. The polymeric material documentation has been implemented by development of a menu-driven laboratory database version of ASTM Guide for the Identification of Polymers (Excludes Thermoset Elastomers) in Computerized Material Property Data-bases (E 1308-92). Examples are provided from the screening test found in the initial section of the test method scheme. One is able to execute a rapid paperless transfer of predictive and experimental screening results to the chemical-material compatibility database, query the results to eliminate a substantial fraction of materials and rank a more limited set of candidate materials to provide a useful “deselection” capability.
chemical-material compatibility, computers, computerized test reports, computerized material property databases, data systems, materials databases
Research chemist, SCBRD-RTC, Aberdeen Proving Ground, MD