Abstract
The tensile and compressive properties of polyformaldehyde（POM）under different strain rates at room temperature were tested to resolve the impact brittleness of the polymer under explosive cutting. The basic laws of tensile strength，compressive strength and fracture strain as a function of strain rate of domestic and imported POM were obtained，and the mechanism of strain rate strengthening and embrittlement of the material was revealed. The results show that with the increase of strain rate，POM shows an obvious increase in strength and a decrease in toughness，indicating that the material is strain rate-sensitive. The mechanism of strain rate strengthening and embrittlement of the material is the result of multiple orientations of POM in the amorphous and crystalline regions under external loads. It is feasible for domestic POM materials to replace imported materials.
| Translated title of the contribution | Effect of strain rate on dynamic mechanical properties of POM |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 22-27 |
| Number of pages | 6 |
| Journal | Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics |
| Volume | 42 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2025 |