A multi-mechanism constitutive model for the dynamic failure of quasi-brittle materials. Part I: Amorphization as a failure mode

Qinglei Zeng, Andrew L. Tonge, K. T. Ramesh*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

22 引用 (Scopus)

摘要

This is the first part of a 2-paper series describing a generalized multi-mechanism constitutive model for the dynamic failure of quasi-brittle materials (e.g., ceramics and geomaterials), and focus on the poorly understood mechanism of amorphization. Amorphization has long been recognized as a significant deformation mechanism in a variety of quasi-brittle materials. In this part, we develop an amorphization model based on observations in both experiments and atomistic simulations. We consider the onset of amorphization bands and the deformation of amorphous phases inside the bands. The sliding along amorphization bands introduces damage to the materials, which eventually results in material failure, and the response of the failed material is described as granular flow. Using boron carbide (BC) as a representative material, we determine the material parameters and validate the model using plate impact experiments under different shock conditions. Finally, we use the model to predict the response of BC under dynamic Vickers indentation, and compare the simulation results with experiments from the literature to demonstrate the capability of the proposed model.

源语言英语
页(从-至)370-392
页数23
期刊Journal of the Mechanics and Physics of Solids
130
DOI
出版状态已出版 - 9月 2019
已对外发布

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Zeng, Q., Tonge, A. L., & Ramesh, K. T. (2019). A multi-mechanism constitutive model for the dynamic failure of quasi-brittle materials. Part I: Amorphization as a failure mode. Journal of the Mechanics and Physics of Solids, 130, 370-392. https://doi.org/10.1016/j.jmps.2019.06.012