多孔铁合金在高应变率下力学性能研究

Study on the Mechanical Behavior of Porous Iron Alloy at High Strain Rates

利用分离式霍普金森压杆实验装置(SHPB),对多孔铁合金在高应变率下的力学行为进行了研究,分析了材料的相对密度和应变率对其力学性能的影响。提出了一个能够描述多孔铁合金的力学行为的多参数唯象本构模型,并将本构模型预测的结果与实验结果进行了对比,其误差不超过10%,模型预测结果与实验结果吻合较好。本研究对多孔铁合金在工业设计和工程应用有一定的指导意义。

An experimental investigation on the mechanical behavior of porous iron alloy at high strain rates was carried out using SHPB apparatus in this study to explore the effects of rela- tive density and strain rate. Furthermore, a multi-parameter constitutive model, which is able to fully describe the behavior of porous bronze, was developed. The calculated and experimental re- sults were compared and the comparison showed that there is a good agreement （the error less than 10%） between the calculated and experimental results. This study has a guiding significance to the industrial design and application of porous iron alloy.