Application of a PVDF-based stress gauge in determining dynamic stress-strain curves of concrete under impact testing

作者：Meng, Yi; Yi, Weijian^*

来源：Smart Materials and Structures, 2011, 20(6): 065004.

DOI：10.1088/0964-1726/20/6/065004

Polyvinylidene fluoride (PVDF) piezoelectric material has been successfully applied in many engineering fields and scientific research. However, it has rarely been used for direct measurement of concrete stresses under impact loading. In this paper, a new PVDF-based stress gauge was developed to measure concrete stresses under impact loading. Calibrated on a split Hopkinson pressure bar (SHPB) with a simple measurement circuit of resistance strain gauges, the PVDF gauge was then used to establish dynamic stress-strain curves of concrete cylinders from a series of axial impact testing on a drop-hammer test facility. Test results show that the stress curves measured by the PVDF-based stress gauges are more stable and cleaner than that of the stress curves calculated with the impact force measured from a load cell.

• 出版日期2011-6
• 单位湖南大学