Effect of Loading Parameters on Fatigue of Composite Laminates: Part IVInformation Systems

摘要

Damage tolerance, damage resistance and durability assessments of aircraftcomposite structures are essential components of certification. The certification procedure requires lengthy experimental validation of those assessments, although much research has been conducted to understand the behavior of polymer matrix composites under service conditions. A fair amount of data is available together with a number of analytical models in these areas of research. However, because of the vast number of parameters involved, a generic model is rather difficult to develop. The ultimate goal of this study is the identification of design parameters to be used in the development of information system tools that can help engineers synthesize different sets of data efficiently. In the information system developed in the current work for structural behavior with damage, all parameters that have been studied are available for the user to choose as input. The output contains design parameters such as compression strength after impact, dent depth, and damage area as well as literature references, raw data, tables and plots. The information systems is constituted in a relational database environment and tools from expert system technology are incorporated so that low confidence input can be captured and flexibility can be maintained in similarity assessments. With this system it is also possible to conduct parametric studies to determine the effect of each design parameter or a combination of parameters on the damage behavior. Case examples are included to demonstrate practical uses of the information system for both data retrieval and similarity studies.