High-Rate In-Plane Shear Testing of IM7/8552 Using the Split Hopkinson Tension Bar

被引：8

作者：

Ledford, Noah ^{[1
]}

Imbert, Mathieu ^{[2
]}

May, Michael ^{[3
]}

机构：

[1] EMI, Ernst Mach Inst, Fraunhofer Inst High Speed Dynam, Space Technol Grp, D-79104 Freiburg, Germany

[2] EMI, Ernst Mach Inst, Fraunhofer Inst High Speed Dynam, Res Grp,Multimat Struct Grp, D-79104 Freiburg, Germany

[3] EMI, Ernst Mach Inst, Fraunhofer Inst High Speed Dynam, Mat & Simulat Methods, D-79104 Freiburg, Germany

来源：

AIAA JOURNAL | 2021年 / 59卷 / 10期

关键词：

STRAIN-RATE; FIBER ROTATION; SPECIMEN SIZE; STRENGTH; COMPRESSION;

D O I：

10.2514/1.J060269

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The high-rate in-plane shear properties of IM7/8552 carbon/epoxy composite material were investigated using a split Hopkinson tension bar featuring constant impedance mountings and semiconductor strain gauges in order to maximize the quality of the load signal. The in-plane shear response up to failure was evaluated using digital image correlation and correction terms for fiber rotation. The data confirmed previously determined experimental data reporting an increase of in-plane shear strength with increasing loading rate: In-plane shear strengths of 135 and 175 MPa were measured for strain rates of 320 and 2600 s(-1), respectively. The results indicate that a Johnson-Cook-type semilogarithmic scaling law can be used to describe the evolution of in-plane shear strength with increasing loading rate.

引用

页码：4257 / 4263

页数：7

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