Dynamic flexural strength of Aluminosilicate glass with a perspective of impulsive and quasi-impulsive responses:An experimental-numerical coupled evaluation

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外文摘要：The flexural strength of glass is a critical design parameter for applications encountering impact loadings.However,the micro defects,specimen geometry,loading rate,and load transfor-mation from a quasi-dynamic to quasi-impulsive state may influence the measurement accuracy.Due to the stochastic and amorphous nature of the material,an accurate determination of the flex-ural strength remains a challenge.In this two-fold study,a coupled experimental-numerical strategy was devised to evaluate the dynamic flexural strength.In the first phase,three-point bending exper-iments were conducted on a novel"Electromagnetic Split Hopkinson Pressure Bar(ESHPB)".The incident stress signal and fracture time were recorded from experimental data,while the flexural strength was indirectly computed from a numerical algorithm.A quantitative comparison of the flexural strength with those in existing literature established the accuracy of the proposed method-ology.Results of the study indicate that the specimen response became independent of the support conditions under impulsive loading.That being said,the specimen behaved like it had an infinite span length,and the measured flexural strength remained the same whether the specimen was sup-ported or not.Besides,the specimen also maintained contact at the interfaces of the incident bar and fixture supports for the entire loading duration.In the second part of this study,the computed flexural strength was used to calibrate the existing JH-2 model.Numerical prediction of the damage propagation corroborated with that obtained from reprography images,though qualitatively.This work presents a precise and robust methodology to determine the dynamic flexural strength of brit-tle ceramics like Aluminosilicate glass over traditional experimental procedures to facilitate its adoption.

外文关键词：

Dynamic flexural strengthDamage mechanismFlexural fractureNumerical simulationAluminosilicate glass

作者：

Muhammad Aamir RAZA、Tao SUO、Uzair Ahmed DAR、Muhammad ATIF、Muhammad Zakir SHEIKH

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作者单位：

School of Aeronautics and Institute of Extreme Mechanics,Northwestern Polytechnical University,Xi'an 710072,China

Joint International Research Center of Impact Dynamics and Its Engineering Application,Northwestern Polytechnical University,Xi'an 710072,China

Shaanxi Key Laboratory of Impact Dynamics and Engineering Application,Northwestern Polytechnical University,Xi'an 710072,China

National Key Laboratory of Strength and Structural Integrity,Northwestern Polytechnical University,Xi'an 710072,China

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出版年：

2024

DOI：

10.1016/j.cja.2024.07.009

中国航空学报(英文版)

中国航空学会

中国航空学报(英文版)

CSTPCDEI

影响因子：0.847

ISSN：1000-9361

年,卷(期)：2024.37(12)