Full Field Measurement Techniques for High Strain Rate Testing of Composites

工程结构的设计必须能够在特性试验期间测量其组成材料的变形。传统上，这是通过将应变片粘在试样的特定位置来完成的。随着近年来数字成像技术和计算能力的快速发展，基于光学的全场测量技术的数值处理越来越受欢迎。该提案旨在为法国Chlons en香槟的ParisTech Arts et Mtiers（前身为ENSAM）的Raphael Moulart博士提供访问奖学金，以便在布里斯托大学工作，研究将此类全场技术应用于复合材料高应变测试的可行性。新的图像处理将用于识别和跟踪材料测试过程中出现的损伤，并提取材料特性。这在复合材料的情况下是重要的，因为它们可以表现出显著的速率依赖性。

It is important for design of engineering structures to be able to measure deformation of their constituent materials during characterisation tests. Traditionally this has been done using strain gauges glued onto specimens at specific locations. With recent rapid developments in digital imaging techniques and computing power, numerical processing of optically based full field measurement techniques is gaining popularity. This proposal seeks to fund a visiting fellowship for Dr Raphael Moulart from ParisTech Arts et Mtiers (formerly ENSAM) in Chlons en Champagne, France to work at the University of Bristol to investigate the feasibility of apply such full field techniques to high strain testing of composite materials. Novel image processing will be used to identify and track damage as it develops during the material tests and also extract material properties. This is important in the case of composite materials as they can exhibit significant rate dependence.