Damping,Static,Dynamic,and Impact Characteristics of Laminated Beams Typical of Windshield Construction.

摘要

This eight section report contains the test plans, test results and analyses for a series of monolithic and laminated transparent beams which represent aircraft windshield segments. A method of imbedding strain gages, mounting strain gages, and the application of thermocouples is described. The method of data collection was assessed for data reduction that could provide stress-strain relationships. These relationships were used for the determination of energy transfer, dynamic response, and displacements due to applied loads. Selected portions of the test data were correlated with data output in a math model representation of test specimens noted in Section IX of AFFDL-TR-77-1. Eleven cantilevered damping specimens were tested at various levels in order to study the damping characteristics for each ply of the laminate utilizing strain recordings. The strain responses were checked for accuracy with respect to theoretical strains calculated as a function of the applied loads.