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shear rate

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Published: 15 May 2022
Fig. 7 Viscosity and shear stress versus shear rate for PDMS (polydimethylsiloxane) from rotational rheometry More
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Published: 15 May 2022
Fig. 4 Viscosity as a function of shear rate for a highly filled uncured epoxy formulation. Source: Ref 11 More
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Published: 15 May 2022
Fig. 6 Steady-state viscosity as a function of shear rate for an epoxy resin with various levels of silica filler. Source: Ref 12 More
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Published: 15 May 2022
Fig. 8 Viscosity versus shear rate for a commercial polymer with varying molecular weights. Mw, molecular weight More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... corresponding to soft-and-weak, soft-and-tough, hard-and-brittle, and hard-and-tough plastics and temperature-modulus plots representative of polymers with different degrees of crystallinity, cross-linking, and polarity. It explains how viscosity varies with shear rate in polymer melts and how processes align...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006930
EISBN: 978-1-62708-395-9
... for shear testing and often-used ratios Table 1 Machine parameters and their corresponding fundamental rheological parameters for shear testing and often-used ratios Machine parameter Corresponding rheological parameter Symbol Units Velocity, angular velocity Shear rate γ ˙ 1...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006849
EISBN: 978-1-62708-395-9
... (extrusion plastometer, ASTM D1238-13, Ref 8 ); however, the data generated are influenced by preheating time, test chamber temperature, and applied load (shear force and shear rate) as well as preparatory cleaning and charging of the polymer pellets into the test orifice (ungloved hand oils acting...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006924
EISBN: 978-1-62708-395-9
... of curing ( Ref 6 ). Many thermoset formulations are highly filled, and the dispensing performance prior to curing is a critical process step. Parallel-plate rheological testing allows the viscosity versus shear rate to be determined. During curing, oscillatory parallel-plate measurements, combined...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006934
EISBN: 978-1-62708-395-9
... how the applied stress, strain and/or strain rate, and temperature influence the rate of creep and stress relaxation and produce yielding. In addition, the effects of thermal and mechanical history must be considered. Polymers deform by two primary mechanisms: shear flow and crazing ( Ref 1...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... that can cause specimen-scale shear banding is the combination of minimum strain hardening and negative strain rate hardening. A second case in which the central fibrous zone is (apparently) absent has been reported in an HY-100 steel. Both cases are discussed in this article. When edge- or center...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... that can cause specimen-scale shear banding is the combination of minimum strain hardening and negative strain-rate hardening. A second case in which the central fibrous zone is (apparently) absent has been reported in an HY-100 steel. Both cases are discussed in this article. When edge- or center...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
... under high strain rate compression . Mater. Sci. Eng. A 527 , 7565 – 7570 ( 2010 ) 10.1016/j.msea.2010.07.102 14. Backman M.E. , Finnegan S.A. : In metallurgical effects at high strain rate . Plenum Press , New York ( 1973 ) 15. Walley S.M. : Shear localization...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001723
EISBN: 978-1-62708-221-1
... content. Although the degree of ductility shown in the standard tensile and bend tests was satisfactory, the material was highly notchsensitive, brittle fracture occurring under conditions involving loading at a slow rate, as in bending, and also under impact; and even during a shearing operation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001438
EISBN: 978-1-62708-224-2
... Abstract A crane hook of 200T rated capacity failed suddenly at an indicated load of 143T, while the crane was undergoing a load test. Fracture took place through the intrados of the hook at the region of maximum stress. The jib and other portions suffered subsequent damage following the sudden...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006944
EISBN: 978-1-62708-395-9
... and strain-rate ( ε ̇ ) constants. The criterion for craze initiation was obtained by using a PS specimen that was stressed in the tension-compression quadrant ( Ref 32 ). Figure 16 presents the locus for crazing stress (in red) and the von Mises locus (in blue) for shear yielding. It is interesting...
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Published: 01 December 2019
Fig. 15 Theoretic curves (Ashby–Verrall model) of logarithm of yield stress/shear modulus versus logarithm of strain rate considering different grain sizes as well as for the steel investigated ( dashed line ) More
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Published: 01 January 2002
Fig. 12 Schematic illustration of transition from flat (tensile mode) fatigue crack propagation to growth on a slant plane (shear mode). Propagation on a slant plane can occur in relatively thin, tough materials at high growth rates. Source: Ref 14 More
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Published: 15 January 2021
Fig. 12 Schematic illustration of transition from flat (tensile mode) fatigue crack propagation to growth on a slant plane (shear mode). Propagation on a slant plane can occur in relatively thin, tough materials at high growth rates. Source: Ref 14 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... rolled below the reported annealing range for the alloy. In a similar alpha-beta alloy, shear band formation has been shown to be a function of processing temperature, microstructure, and deformation rate for a given tool geometry [ 5 ]. Considering the above evidence, it was not surprising that all...