The Effect of Specimen Length in φ75 mm Split Hopkinson Pressure Bar Experiment
LI Sheng-lin
LIU Dian-shu
LI Xiang-long
KANG Hou-jin
WANG Li-bin
Abstract：A φ75 mm Hopkinson split pressure bar was used to test a series of concrete speci-mens of different strengths and lengths.The effect of specimen length was investigated.The resuIts show that specimens shorter than 25 mm give results where friction effects have a sig-nificant effect.Specimens longer than 90 mm are clearly Subject to reflex bending and do not reflect the true dynamic mechanical properties of the material.Over the range from 30 to 75mm(an aspect ratio,L/D,of 0.4 to 1.0)specimen length is not a factor and the results accu-rately reflect the dynamic mechanical properties of the specimen.
Keywords：dynamic propertiesSHPB techniquesize effectconcrete
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 93-97 )