Experimental and numerical investigation on dynamic fracture behavior of a ZrB2-SiC composite ceramic

IF 2.1 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Mechanics of Time-Dependent Materials Pub Date : 2023-11-08 DOI:10.1007/s11043-023-09645-5

Kuikui Yang, Zhou Hu, Lingling Wang, Runyun He

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Abstract

The effect of the loading rate on the dynamic fracture behavior of a ZrB₂-SiC ceramic was investigated using a split Hopkinson pressure bar on a single-edge notch beam. The dynamic fracture toughness was measured, and the failure mode of the ZrB₂-SiC ceramic was identified. The rate-dependent constitutive model of JOHNSON_HOLMQUIST II (JH-II) was utilized to analyze the effect of the loading rate on the stress intensity factor and the failure process of the ZrB₂-SiC ceramic. Results show that the dynamic fracture toughness and the energy dissipation rate increase with the increase of the loading rate. The dynamic fracture toughness improved from 9.92 MPa⋅m\(^{1/2}\) at 6.68×104 MPa⋅s⁻¹ to 31.5 MPa⋅m\(^{1/2}\) at 28.26×104 MPa⋅s⁻¹. The JH-II model was found suitable to model the dynamic fracture behavior of the ZrB₂-SiC ceramic. Both experimental and numerical results showed that the fracture process of the ZrB₂-SiC ceramic showed dependence on the loading rate. The crack first initiated from the plane of the notch induced by the tensile stress applied near the crick tip. At high loading rates, the ZrB₂-SiC ceramic specimen absorbed more energy and fractured to a larger number of small fragments than at a lower rate.

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ZrB2-SiC 复合陶瓷动态断裂行为的实验和数值研究

在单边缺口梁上使用分体式霍普金森压力棒研究了加载速率对 ZrB2-SiC 陶瓷动态断裂行为的影响。测量了动态断裂韧性，并确定了 ZrB2-SiC 陶瓷的破坏模式。利用与速率相关的 JOHNSON_HOLMQUIST II（JH-II）构成模型分析了加载速率对 ZrB2-SiC 陶瓷应力强度因子和破坏过程的影响。结果表明，动态断裂韧性和能量耗散率随着加载速率的增加而增加。动态断裂韧性从 6.68×104 MPa⋅s-1 时的 9.92 MPa⋅m （^{1/2}\）提高到 28.26×104 MPa⋅s-1 时的 31.5 MPa⋅m （^{1/2}\）。JH-II 模型适用于模拟 ZrB2-SiC 陶瓷的动态断裂行为。实验和数值结果都表明，ZrB2-SiC 陶瓷的断裂过程与加载速率有关。裂纹首先从缺口平面开始，由施加在缺口尖端附近的拉应力诱发。在高加载速率下，ZrB2-SiC 陶瓷试样吸收的能量更大，断裂成的小碎片数量也比低速率下更多。

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来源期刊

Mechanics of Time-Dependent Materials 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.