In-plane compressive mechanics behavior and failure mechanism for SW200/ LWR-2 glass-woven composite

In order to investigate the in-plane compressive mechanics behavior of the SW200/LWR-2 glass-woven composite and establish the constitutive model, the in-plane compressive tests for this material were performed with the strain rates of 0. 001 s ^-1, 0. 1 s^-1, 500 s^-1 and a temperature range from - 55 ℃ to 100 ℃. The dynamic compressive tests were carried out using the SHPB technique, a constant loading strain rate was achieved with a waveform shaper, and it is also verified that the stresses on the two sides of the specimen are in balance. Experimental results show that the mechanical properties of the SW200/LWR-2 glass-woven composite are sensitive to the strain rate and temperature; its strength increases with increasing strain rate, and decreasing temperature. Macro- and microscopical observation reveals that the samples under quasi-static loading presents hearing failure mode , and the fibre bundles of the samples are extensively debonded and pulled out. The samples under dynamic loading present shearing and delamination modes with lots of rags, and at the same time the debonding of the fibre bundles is restrained. Finally, based on the damage mechanics theory, a compressive constitutive model including the strain rate and temperature effects for the SW200/LWR-2 composite is established, and the modeling results have good agreement with the experimental results.