Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5205756 | Polymer Testing | 2016 | 24 Pages |
Abstract
The mechanical properties of composite modified double base (CMDB) propellant significantly depend on the strain rate. In particular, the yield stress increases dramatically at higher strain rates. To study this behaviour, low, intermediate and high strain rate compression testing (1.7Â ÃÂ 10â4 to 4Â ÃÂ 103Â sâ1) of CMDB propellant at room temperature was conducted by using a universal testing machine, a hydraulic testing machine and a split Hopkinson pressure bar (SHPB) system, respectively. The yield stress was observed to increase bilinearly with the logarithm of strain rate, with a sharp increase in slope at a strain rate of 5Â ÃÂ 101Â sâ1, which was supported by dynamic mechanical analysis (DMA) testing. The Ree-Eyring model, involving two rate-activated processes, was employed to predict the yield behaviour of CMDB propellant over a wide range of strain rates. The predictions are in excellent agreement with the experimental data.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Long Yang, Ningfei Wang, Kan Xie, Xin Sui, Shipeng Li,