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75-mm Hopkinson system

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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003301
EISBN: 978-1-62708-176-4
... techniques in detail. It illustrates a 75-mm Hopkinson system, particularly designed to test large samples of concrete, rock, polymeric composites, and other materials with relatively coarse microstructures. The article also provides information on the pneumatic pressure vessel for a 75-mm Hopkinson bar test...
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Published: 01 January 2000
Fig. 1 Photograph of a 75 mm (3 in.) diam Hopkinson bar test system More
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Published: 01 January 2000
Fig. 2 Schematic of a 75 mm (3 in.) diam Hopkinson bar test system More
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Published: 01 January 2000
Fig. 3 Photograph of a pneumatic pressure vessel for a 75 mm (3 in.) Hopkinson bar test system More
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Published: 01 January 2000
Fig. 4 Schematic of a pneumatic pressure vessel for a 75 mm (3 in.) Hopkinson bar test system. t , thickness; D , diameter; OD, outside diameter More
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
... without a concomitant decrease in the specimen and bar diameters. The use of small diameter bars (<6 mm) to achieve higher strain rates is a common practice in split-Hopkinson pressure bar testing ( Ref 3 ). Pulse Shaping Because the value of t from Eq 17 has a practical minimum...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003303
EISBN: 978-1-62708-176-4
... including Dieter ( Ref 46 ), Zukas ( Ref 40 ), Duvall ( Ref 51 ), Graham ( Ref 36 ), Fowles ( Ref 47 ), and McQueen ( Ref 49 ). Explosive-driven shock-loading systems offer the advantage of shock loading very large sample assemblies and components. Impact velocities up to approximately 6 mm/μs ( 15 64...
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 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...
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
... to about 10 2 s −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...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003300
EISBN: 978-1-62708-176-4
... the test. The technique is a variation of a technique proposed by Kolsky ( Ref 2 ), in which the specimen is loaded in compression. It is described in the article “Classic Split-Hopkinson Pressure Bar Testing” in this Volume. Fig. 1 Dynamic aspects of material testing. Source Ref 1 Fig...
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
... 0.28 89 77 73 68 64 59 55 50 46 41 37 32 28 23 18 14 10 0.30 88 76 71 66 61 56 52 47 42 37 32 27 23 18 13 9 3 0.31 88 75 70 65 60 55 50 45 40 35 30 25 20 18 10 5 0 Dimension B , mm Dimension A , mm 1.0 1.5 2.0 2.5 3.0 3.5 4.0...
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
... damage. The article 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...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.9781627082907
EISBN: 978-1-62708-290-7
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
... at indicated load mm in. 3000 kgf 1500 kgf 500 kgf 1.6 1 16 602 301 100 3.2 1 8 301 150 50 4.8 3 16 201 100 33 6.4 1 4 150 75 25 8.0 5 16 120 60 20 9.6 3 8 100 50 17 Microindentation...
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
... In the same conditions previously given ( p ∞ = 10 5 Pa, p v = 2300 Pa, ρ = 1000 kg/m 3 ) and for a bubble of initial radius R 0 = 1 mm (0.04 in.), the collapse time is τ = 92 μs. This estimate shows that the lifetime of a cavitation bubble is generally quite small, which is consistent with the high...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006306
EISBN: 978-1-62708-179-5
... 7 ). These compression tests were performed by applying a split Hopkinson bar method to simulate the conditions observed during chip formation at high cutting speed. Grade 1 ADI has a more pronounced strain-hardening behavior when compared to the other SGIs, because the austenite in austempered...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005808
EISBN: 978-1-62708-165-8
... approximately 0.1 mm (0.004 in.) ( Ref 25 ), so it is appropriate for laser direct metal deposition (LDMD). In turn, the microstructure is a function of the thermal gradients and cooling rates during solidification and is related to the cooling rate by the Kurz and Fischer relationships ( Ref 26 ), which can...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... and advancing within the nominal range of 10 −5 to 10 −3 mm/cycle, [1] the crack growth rate, da/dN , can be expressed as a function of the stress intensity factor K ( Ref 15 , 31 , 32 ): (Eq 1) d a d N = C ( Δ K ) m where a is the distance of fatigue crack advance, N...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006495
EISBN: 978-1-62708-207-5
..., for example, by means of a conveyor belt. By controlling these parameters, the continuous casting process can yield a wide range of foam densities (0.11 to 0.55 g/cm 3 ) and thicknesses (12.7 to 88.9 mm, or 0.5 to 3.5 in.) with significant volume output. A schematic picture of this process is shown in Fig. 2...