EVALUATION OF DEFORMATION-BEHAVIOR IN POLYAMIDE USING LASER EXTENSOMETRY

The laser extensometry was used to evaluate the focal deformation beha viour in injection moulded PA6- and PA66-composites as a function of t he fibre content under quasi-static tensile loading. Using this techni que the local and time dependent deformation behaviour can be analysed in the interested zones of the specimen. Through comparison between t he integral and local mechanical properties, the heterogeneity of the materials was diagnosed. The applicability of the laser extensometry o n investigating the fibre-adhesion behaviour was examined. Under focal strain controlled testing the deformation behaviour can be expectantl y better characterised than under integral strain controlled testing. (C) 1997 Elsevier Science Ltd.