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elastic moduli

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001606
EISBN: 978-1-62708-226-6
... to the ratio of the elastic moduli of the two materials. If titanium were substituted for stainless steel, the stresses would be reduced by a factor of 116 to 220, their elastic moduli ratio. When this is combined with the much higher yield stress of the titanium alloy, 800 MPa (116 ksi) compared with just 250...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... cleaning may be well known within specific medical device companies, judging by the number of problems observed by the authors, this issue does not appear to be common knowledge across the entire medical device industry. The natural frequency of a given structure is a function of its elastic moduli...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006941
EISBN: 978-1-62708-395-9
... ultimately, one of fracture. If the material is a solid, then the simplest relationship between force and deformation is one in which the applied stress is proportional to the total resultant strain. The proportionality factor is referred to as a modulus of elasticity in the solid material; it may be used...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006919
EISBN: 978-1-62708-395-9
... of a component to failure due to stresses applied at high rates. The two most significant concepts in this definition are those of failure due to mechanical stress and high rates of loading. Failure of a plastic component can take many forms. There are situations in which excessive elastic deformation...
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
... is measured as the sample is heated. Properties measured include the storage and loss moduli and tan δ (the ratio of the loss modulus to the storage modulus, which is a measure of the damping capability of a material). Measurements prior to gelation can be made on thermoset samples coated onto a wire mesh...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006928
EISBN: 978-1-62708-395-9
... properties of plastics Material(a) Tensile strength Elongation, % Modulus of elasticity Compressive strength Modulus of rupture Hardness MPa ksi GPa 10 6 psi MPa ksi MPa ksi Thermosets EP, reinforced with glass cloth 350 51 … 175 25 410 59 485 70 … MF, alpha...
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
..., angular velocity On the other hand, pure deformation, which is appropriate for describing how solids behave (elastic behavior), is denoted by a spring in rheology textbooks. The behavior exhibited by solids is shown in Fig. 2 , which shows that for solids, the force exerted by the operator...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... <xref rid="a0003541-ref3" ref-type="bibr">(Adapted from Ref 3)</xref> Under circumstances in which metals may be regarded as purely elastic, polymers may deform nonelastically; that is, in a viscoelastic fashion. Their stress-strain response is nonlinear with time-dependent (creep) deformation; consequently, their fracture behavior...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... + 1 − v 2 2 E 2 (Eq 2) p x = p 0 1 − x / a 2 where P is the normal linear loading acting on the rolls; R 1 and R 2 are the radii of the rolls, respectively; E 1 and E 2 are Young’s moduli of the materials of the rolls, respectively; v 1...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006865
EISBN: 978-1-62708-395-9
...-weight distribution and the associated averages. This is discussed in more detail in the article “ Characterization of Plastics in Failure Analysis ” in this Volume. Deformation and Fracture Under circumstances in which metals may be regarded as purely elastic, polymers may deform nonelastically...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006931
EISBN: 978-1-62708-395-9
... is the elastic, or storage, modulus ( G ′); the out-of-phase response is the viscous, or loss, modulus ( G ″). The relationship between the two moduli, G ″/ G ′, is the loss tangent, or dissipation factor, commonly known as tan δ ( Ref 30 , 31 ), and is related to the ability of the polymer to dissipate...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
... properties as well. For example, Apicella and Nicolais ( Ref 41 ) show the epoxy-resin system DGEBA cured with tetraethylenetriamine (TETA) then conditioned in water at 20 and 50 °C (68 and 120 °F), absorbs 2.96 and 3.22 wt.% water, respectively, resulting in a decrease in elastic moduli by 5.9 and 6.6 MPa...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
... in the parallel (O P ) orientation ( Ref 32 ). A cyclic wear model based on volume fraction of fiber ( V f ), wear resistance, and elastic moduli of its constituents shows a very good matching of experimental data with the calculated one ( Ref 34 ). The wear model developed for FRPs ( Ref 31 ) also shows good...
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
..., and addresses related considerations such as melt viscosity and melt strength, crystallization, orientation, die swell, melt fracture, shrinkage, molded-in stress, and polymer degradation. composition elastic modulus engineering plastics polymer properties polymer structure shear rate...
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
.... Polymers are viscoelastic, that is, they respond to stress as if they were a combination of elastic solids and viscous fluids, but not always in a stable 50–50 proportion. The balance of the storage and loss components of a polymer is important in determining its melt processibility and functionality...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
... F c πb 1 − v 1 2 E 1 + 1 − v 2 2 E 2 / 1 R 1 + 1 R 2 t where v 1 and v 2 are, respectively, the Poisson’s ratios of the materials for cylinders 1 and 2; E 1 and E 2 are, respectively, Young’s moduli of materials...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
..., as measured by modulus, as a function of temperature or time. Polymeric materials display both elastic and viscous behavior simultaneously, and the balance between the elastic recovery and viscous flow changes with temperature, time, and frequency ( Ref 6 ). Measurements can be made in several modes...
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.a0006932
EISBN: 978-1-62708-395-9
... with lower glass moduli, or lower the CTEs. Decrease convective heat transfer, that is, air cool instead of ice cool. Increase thermal diffusivity. This results in more homogeneous cooling. It has been reported, for example, that thermal stresses are reduced by the incorporation of small amounts...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... on a microscopic scale may have components of ductile or brittle crack propagation, but the macroscopic process of fracture is characterized by little or no work being expended in the form of permanent (i.e., plastic) deformation. The macroscopic behavior is essentially elastic up to the point of failure...