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The Advanced Composites Repair Analysis Tool (ACRAT) has been under development for the USAF Advanced Composites Program Office under an Ogden ALC Design Engineering Program (DEP) Contractual Engineering Task (CET) Order. ACRAT is an integrated prototype software system consisting of commercial-off-the-shelf (COTS) and public domain CAE simulation codes and customized databases. The objective has been to develop Beta versions of this computer aided composite repair design and assessment engineering tool following the provisions and procedures of the ASTM Standard E 1340-90 (Reference 1). The standard guide produces working models early in the development cycle, which allows users and developers to learn functional requirements and appropriate system design details by actually interacting with a series of prototypes. Two Beta versions, of a planned six Beta cycle development effort (three-year program), have been completed to-date.