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tensile Hopkinson bar

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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003296
EISBN: 978-1-62708-176-4
... Abstract This article describes the techniques involved in measuring the high-strain-rate stress-strain response of materials using a split-Hopkinson pressure bar (SHPB). It focuses on the generalized techniques applicable to all SHPBs, whether compressive, tensile, or torsion. The article...
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Published: 01 January 2000
Fig. 7 “Top-hat” tensile split-Hopkinson bar sample design. Source: Ref 14 More
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Published: 01 January 2000
Fig. 8 Schematic of a tensile split-Hopkinson pressure bar test setup More
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Published: 01 November 2010
Fig. 13 Schematic diagram of specimen design and stress-wave propagation for (a) compressive and (b) tensile Hopkinson bar tests. Source: Ref 14 More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003298
EISBN: 978-1-62708-176-4
... testing is problematic or impossible, such as polymer foams. In the second case, FEM can provide a valuable tool to verify and validate sample geometry design where equilibrium considerations are paramount, such as tensile SHPB specimens. Unlike the compressive Hopkinson bar where right-regular sample...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003297
EISBN: 978-1-62708-176-4
... Fig. 3 Operation of the recovery tension Hopkinson bar. (a) Striker tube impacts transfer flange. (b) The resulting tensile pulse closes the preset precision gap. (c) The compression pulse, which reflects off the sample into the incident bar, reaches the transfer flange and is transmitted...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003293
EISBN: 978-1-62708-176-4
..., Bertram Hopkinson. Based on these contributions and also on an important paper by R.M. Davies, H. Kolsky invented the split-Hopkinson pressure bar, which allows the deformation of a sample of a ductile material at a high strain rate, while maintaining a uniform uniaxial state of stress within the sample...
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Published: 01 January 2000
Fig. 3 Operation of the recovery tension Hopkinson bar. (a) Striker tube impacts transfer flange. (b) The resulting tensile pulse closes the preset precision gap. (c) The compression pulse, which reflects off the sample into the incident bar, reaches the transfer flange and is transmitted More
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Published: 01 January 2000
Fig. 14 Split-Hopkinson bar test using threaded tension specimen. (a) Schematic of tensile loading apparatus. Source: Ref 48 . (b) Lagrangian diagram for tensile loading apparatus. CRO, cathode ray oscilloscope More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003294
EISBN: 978-1-62708-176-4
... Abstract This article reviews high strain rate compression and tension test methods with a focus on the general principles, advantages, and limitations of each test method. The compression test methods are cam plastometer test, drop tower compression test, the Hopkinson bar in compression...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003299
EISBN: 978-1-62708-176-4
... is described in the article “Recovery Hopkinson Bar Techniques” in this Volume. Upon impact of the striker, the momentum-trap design also introduces a tensile pulse following the traditional compression pulse into the incident bar. Moreover, once a specimen is subjected to the initial compression pulse, all...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003302
EISBN: 978-1-62708-176-4
... Abstract This article describes a method for determining the dynamic indentation response of metals and ceramics. This method, based on split Hopkinson pressure bar testing, can determine rate-dependent characteristics of metals and ceramics at moderate strain rates. For example, dynamic...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003295
EISBN: 978-1-62708-176-4
... −1 . Between strain rates of 10 2 and 10 4 s −1 , the torsional Kolsky (or split-Hopkinson) bar has proven to be a very convenient method of testing. Other methods of high strain rate shear testing include double shear and punching, which provide somewhat higher rates than the torsional Kolsky bar...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003315
EISBN: 978-1-62708-176-4
... Development of higher-frequency testing machines began early in the 20th century. Prior to 1911, the highest fatigue testing frequency was on the order of 33 Hz, using mechanically driven systems. Electrodynamic resonance systems appeared in 1911 when Hopkinson ( Ref 1 ) introduced a machine capable of 116 Hz...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005508
EISBN: 978-1-62708-197-9
...) tensile Hopkinson bar tests. Source: Ref 14 In the tension version of the test ( Fig. 13b ), the specimen is attached to incident and transmitted bars. The compressive stress pulse generated in the incident bar travels along the specimen until it reaches the end of the transmitted bar. After...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003330
EISBN: 978-1-62708-176-4
... concludes with a discussion on the split-Hopkinson pressure bar test. compression testing fatigue testing fiber-reinforced composites flexure testing interlaminar failure mechanical properties mechanical testing nondestructive techniques shear testing split-hopkinson pressure bar test strain...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009010
EISBN: 978-1-62708-185-6
... Rate Testing” in Mechanical Testing and Evaluation , Volume 8 of the ASM Handbook , 2000, p 427). For strain rates from 100 to 1000 s −1 , the Hopkinson (Kolsky)-bar method is used. This article and the following discussions only consider isothermal conditions and strain rates below 0.1 s −1 , where...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003308
EISBN: 978-1-62708-176-4
... DYNAMIC FRACTURE occurs under a rapidly applied load, such as that produced by impact or by explosive detonation. In contrast to quasi-static loading, dynamic conditions involve loading rates that are greater than those encountered in conventional tensile tests or fracture mechanics tests. Dynamic...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003276
EISBN: 978-1-62708-176-4
... and Hopkinson pressure bar methods) Abrasion tests Erosion tests The more common types of hardness tests are the indentation methods, described in previous articles in this Section. These tests use a variety of indentation loads ranging from 1 gf (microindentation) to 3000 kgf (Brinell). Low...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006384
EISBN: 978-1-62708-192-4
... tests such as split-Hopkinson pressure bar (SHPB) tests. Split-Hopkinson pressure bar tests allow an estimation of the strain rate sensitivity ( Ref 67 ) that can be included in FEM simulations using a model such as the Johnson-Cook plasticity model in which a logarithmic dependency of flow stress...