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| PC/ABS在高应变率下的压缩大变形 |
| Compressive Large Deformation of PC/ABS at High Strain Rates |
| Received:May 02, 2017 Revised:May 10, 2017 |
| DOI：10.3969/j.issn.1674-6457.2017.03.005 |
| 中文关键词: PC/ABS 高应变率 大变形 本构模型 |
| 英文关键词: PC/ABS high strain rate large deformation constitutive model |
| 基金项目:国家自然科学基金（51125021） |
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| 中文摘要: |
| 目的 对PC/ABS在高应变率下的压缩大变形行为进行实验研究与模拟。方法 在应变率为1600~5000 s-1，温度为293~353 K的范围内，选用霍普金森压杆获取其在高应变率、高温下的大变形行为；选用DSGZ本构模型，模拟PC/ABS在高应变率下的大变形。结果 PC/ABS大变形行为强烈依赖于应变率和温度，屈服应力随应变率增加或温度降低而升高，大变形行为包括弹性、屈服、应变软化和应变硬化。结论 DSGZ本构可准确模拟PC/ABS在高应变率、高温下的大变形行为。 |
| 英文摘要: |
| A combined experimental and constitutive investigation has been performed to study the compressive large deformation behavior of the blends of polycarbonate (PC) and acrylonitrile–butadiene–styrene (ABS) at high strain rates. A split Hopkinson pressure bar(SHPB) was used to characterize the large deformation behavior of PC/ABS at high strain rates for high temperatures, the investigated strain rates ranged from 1600 to 5000 s−1, and the investigated temperatures ranged from 293 to 353 K. The experimental results indicate that large deformation behavior of PC/ABS strongly depends on the strain rate and temperature, and the yield stress increases with the increasing strain rate or the decreasing temperature. To predict the large deformation behavior of PC/ABS, the DSGZ constitutive model was employed, and it has been implemented into ABAQUS/Explicit through a user material subroutine VUMAT. In comparison with the experimental results, the DSGZ model can accurately predict the large deformation behavior of PC/ABS at high strain rates for high temperatures. |
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