考虑应变率和层理倾角的炭质板岩动力学特性及本构模型

doi:10.6040/j.issn.1672-3961.0.2023.240

摘要/Abstract

摘要： 为研究应变率和层理倾角对炭质板岩动力学特性的影响并建立其本构模型,基于分离式霍普金森压杆试验系统,对不同应变率和层理倾角的炭质板岩试样进行动态压缩试验,并分析其应力-应变曲线及破裂形态。在朱-王-唐模型的基础上,综合考虑层理倾角和应变率以及岩石损伤的影响,建立适用于炭质板岩的动态损伤本构模型,利用本构模型对试验数据进行拟合。结果表明:随着应变率的增大,试样的动态峰值强度与峰值应变均增大;随着层理倾角的增大,试样峰值强度呈现先减小后增大的趋势,应变峰值则是先增大后减小;本构模型拟合曲线与试验曲线一致性良好,从而证明该模型的正确性与适用性。

关键词: 动力学特性, 破裂形态, 本构模型, 应变率, 层理倾角

中图分类号:

TU452

胡涛涛,李禹,高咸超. 考虑应变率和层理倾角的炭质板岩动力学特性及本构模型[J]. 山东大学学报 (工学版), 2024, 54(5): 122-131.

HU Taotao, LI Yu, GAO Xianchao. Dynamic characteristics and constitutive model of carbonaceous slate considering strain rate and bedding inclination angle[J]. Journal of Shandong University(Engineering Science), 2024, 54(5): 122-131.

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