One-dimensional wave theory analysis of factors and characteristics influencing errors in two-wave method data processing in SHPB

作     者：Minghui Ma Guangfa Gao 马铭辉;高光发

作者机构：School of Mechanical EngineeringNanjing University of Science and TechnologyNanjing 210094China 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.U2341244,12172179,and 11772160) the Postgraduate Research&Practice Innovation Program of Jiangsu Province 

出 版 物：《Acta Mechanica Sinica》 (力学学报(英文版))

年 卷 期：2025年第41卷第1期

页      码：128-140页

摘      要：A simplified calculation of the specimen’s stress-strain curve is generally conducted using the two-wave method by the split Hopkinson pressure bar(SHPB),which aligns the onset of the transmitted and reflected ***,this approach neglects the travel time of elastic waves within the *** the travel time of elastic waves,this study quantitatively investigates the error characteristics and patterns of stress,strain,and strain rate in the specimen under different conditions using the theoretical two-wave method,and compares the results with those obtained using the onset-aligned twowave *** study reveals that the stress-time curves derived from the theoretical two-wave method are lower than the actual stress curves,whereas those obtained from the onset-aligned two-wave method are consistently higher than the actual stress curves,with the stress deviation approximating a constant value when the dimensionless time exceeds *** starting point of the stress-strain curves obtained by the theoretical two-wave method is not zero but a point on the strain axis,whereas the onset-aligned two-wave method always starts at ***,the slopes of the stress-strain curves obtained by both methods differ from the actual Young’s modulus of the material,and functional relationships between the slopes and the actual Young’s modulus are *** research offers theoretical guidance for the refined design of SHPB experiments and the accurate processing of data.

主 题 词：SHPB Stress wave effect Assumption of stress uniformity Dynamic stress-strain curve 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1007/s10409-024-24169-x

馆 藏 号：203143716...