In this study, the strain rate-dependent dynamic tensile behavior of \(\hbox {ZrB}_{\mathrm {2}}\)-20%SiC ceramic composite was investigated using experimental and numerical approaches. The split Hopkinson pressure bar apparatus was used to measure the dynamic splitting tensile response at strain rates of 17–67 \(\hbox {s}^{\mathrm {-1}}\). The experiment results demonstrate a significant strain rate dependence of the dynamic tensile behavior of the \(\hbox {ZrB}_{\mathrm {2}}\)–SiC ceramic composite. The dynamic tensile strength increased linearly with the strain rate, from 288 MPa at 17 \(\hbox {s}^{\mathrm {-1}}\) to 654 MPa at 67 \(\hbox {s}^{\mathrm {-1}}\). Moreover, a strain rate-dependent tensile strength was introduced into a modified JH-2 model to describe the dynamic tensile behavior and fracture process of \(\hbox {ZrB}_{\mathrm {2}}\)–SiC ceramics. The numerical results of dynamic tensile strength agree well with the experimental result. Moreover, the fracture process of \(\hbox {ZrB}_{\mathrm {2}}\)–SiC ceramics under dynamic tension was further studied by combining high-speed images and numerical results. The effect of strain rate on the fracture process and failure patterns of the \(\hbox {ZrB}_{\mathrm {2}}\)–SiC ceramic composite could be verified by the modified JH-2 model.

在这项研究中，使用实验和数值方法研究了\（\ hbox {ZrB} _ {\ mathrm {2}} \）- 20％SiC陶瓷复合材料的应变速率相关的动态拉伸行为。分裂霍普金森压力棒设备用于测量应变率为17–67 \（\ hbox {s} ^ {\ mathrm {-1}} \）下的动态分裂拉伸响应 。实验结果表明\（\ hbox {ZrB} _ {\ mathrm {2}} \）- SiC陶瓷复合材料的动态拉伸行为具有显着的应变率依赖性。动态拉伸强度随应变率线性增加，从17 \（\ hbox {s} ^ {\ mathrm {-1}} \）时的288 MPa 增加到67 \（\ hbox {s} ^ {\ mathrm}时的654 MPa。  {-1}} \）。此外，将应变率相关的拉伸强度引入到改进的JH-2模型中，以描述\（\ hbox {ZrB} _ {\ mathrm {2}} \）– SiC陶瓷的动态拉伸行为和断裂过程。动态拉伸强度的数值结果与实验结果吻合良好。此外，结合高速图像和数值结果，进一步研究了\（\ hbox {ZrB} _ {\ mathrm {2}} \）– SiC陶瓷在动态张力下的断裂过程。修改后的JH-2模型可以验证应变速率对\（\ hbox {ZrB} _ {\ mathrm {2}} \）- SiC陶瓷复合材料的断裂过程和破坏模式的影响。