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shear properties

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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
... for calculating the shear rate at the capillary wall for non-Newtonian fluids. Use of Cone and Plate and Parallel Plate Geometries in Melt Rheology Determination of a polymer melt’s viscoelastic properties can easily be categorized into two broad areas: steady-shear rheometry and dynamic oscillatory...
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
... is being displayed, it is usually convenient to use the ratios that are shown in Table 1 . For example, when the flow properties of a polymer are being described, the most common way of presenting the data are being displayed as viscosity (η) versus shear rate (γ̇), both of which are graphed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
.... Additionally, warp direction properties were input to the computer program. To complement the analysis, material properties were obtained in the hoop direction, normal to the laminate and in interlaminar double shear. If the predicted stresses exceeded the average material properties, then failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090988
EISBN: 978-1-62708-236-5
... Abstract A jack cylinder split open during simulated service testing. The intended internal test pressurization was reportedly analogous to typical service. The material and mechanical properties of the cylinder pipe were unknown, although subsequent testing showed that the pipe satisfied...
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
... with various regions of the viscosity curve. It discusses the concept of shear sensitivity, the nature of viscoelastic properties, and the electrical, chemical, and optical properties of different plastics. It also reviews plastic processing operations, including extrusion, injection molding, and thermoforming...
Image
Published: 01 January 2002
Fig. 12 Generic types of transfer wear behavior when semicrystalline polymers are slid on a hard smooth surface. In most of the cases there is a formation of transfer layer on the counterface though the shear, and adhesive properties of the transfer films will vary depending upon More
Image
Published: 15 May 2022
Fig. 11 Generic types of transfer wear behavior when semicrystalline polymers are slid on a hard, smooth surface. In most cases, there is a formation of a transfer layer on the counterface, although the shear and adhesive properties of the transfer films will vary depending on the mechanical More
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
... in Semicrystalline Polymers In semicrystalline polymers, the amorphous phase and the crystalline phase have different physical properties, as well as their mechanical response to an applied stress. If the testing temperature is greater than the T g of the polymer, the amorphous phase is rubbery, and shear...
Image
Published: 15 May 2022
Fig. 1 Interfacial wear processes. (a) Initial contact of the two surfaces. (b) Running-in process in which the soft polymer molecules are transferred to the hard counterface. (c) Steady-state wear process in which the wear and friction phenomena are influenced mainly by the shear and adhesive More
Image
Published: 01 January 2002
by the shear and adhesive properties of the transferred film. Reprinted with permission from Ref 1 More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
..., the area of the sheared surface over which fracture propagates when spalling occurs is thereby also increased, causing an increase in the striking force required to produce spalling. Fig. 11 Geometry of the chamfered and radiused edges used by Lodge Fig. 12 Position of the sheared surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089338
EISBN: 978-1-62708-224-2
.... The directionality of the features was found to be suggestive of shear overload. It was observed that fracture preferentially followed the nonmetallic inclusions. The fracture was revealed to be parallel to the direction of the manganese sulfide stringer inclusions. The presence of significant banding of the ferrite...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... property, K Ic . The underlying explanation for this observation follows from the preceding paragraph. Plane-strain conditions increase the hydrostatic stress and inhibit yielding. Under purely hydrostatic loading, no shear stresses exist, as is easily shown by examination of the three Mohr’s circles...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... Abstract A 2–3 mm thick electroformed nickel mold showed early cracking under thermal load cycles. To determine the root cause, investigators obtained monotonic and cyclic properties of electroformed nickel at various temperatures and identified possible fatigue mechanisms. With the help...
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
... change by several orders of magnitude due to chain extension and branching in the early stages of cure, followed by cross linking and development of elastic properties later in the curing process. Fig. 4 Viscosity as a function of shear rate for a highly filled uncured epoxy formulation. Source...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... be remembered that some parts are designed to fracture under certain circumstances. Not doing so may constitute the failure. Shear pins, for example, are commonly used to protect valuable equipment by acting as mechanical fuses. Stress directors in helicopter gearing are also designed so that if gear tooth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... propagation were needed be controlled. It was concluded that improved steel processing procedures, chiefly hot-working temperature and deformation control, were also required to optimize microstructure and properties. Chemical composition Ductile brittle transition Gas pipelines Steel making API 5L...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001596
EISBN: 978-1-62708-225-9
... spring diameter, d is the diameter of the wire, N is the number of turns, and G is the shear modulus. 5 The uncorrected shear stress is calculated from: (Eq 2) τ x = 8 P D m π d 3  in MPa  where P is the load in N . The corrected stress is obtained by multiplying...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001693
EISBN: 978-1-62708-228-0
... and down from the defect when the stress induced by filling reached a critical value for the steel, which had poor toughness properties. This steel had been used in the original construction of a tank in Ohio more than 40 years previously. The defect at which brittle fracture originated in the tank shell...
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
... shearing motions of ductile materials . Res. Mech . 23 , 223 – 238 ( 1988 ) 19. Xu Y.B. , Zhong W.L. , Chen Y.J. , Shen L.T. , Liu Q. , Bai Y.L. , Meyers M.A. : Microstructure and properties of magnesium–aluminum explosively welded composite plate . Mater. Sci...