Martinec-ContinuumMechanics.pdf
... zero or infinite volume. Another implication of this axiom is that the matter is impenetrable, that is, one portion of matter never penetrates into another. In other words, a motion caries every volume into a volume, every surface onto a surface, and every curve onto a curve. In practice, there are ...
... zero or infinite volume. Another implication of this axiom is that the matter is impenetrable, that is, one portion of matter never penetrates into another. In other words, a motion caries every volume into a volume, every surface onto a surface, and every curve onto a curve. In practice, there are ...
Elastic and Inelastic Shock Compression of Diamond and Other
... deformation above the elastic limit. The idealized model of total strength loss beyond the elastic limit is termed elastic-isotropic, in the sense that compression to the elastic limit is one of elastic uniaxial strain, while compression beyond the limit produces states of isotropic stress and strai ...
... deformation above the elastic limit. The idealized model of total strength loss beyond the elastic limit is termed elastic-isotropic, in the sense that compression to the elastic limit is one of elastic uniaxial strain, while compression beyond the limit produces states of isotropic stress and strai ...
Short-time Dynamics of Frictional Strength in Dry Friction
... transforms the initially uniform profile of A(x) to a highly non-uniform one. As shown in [10], large changes in A(x) are generated by each precursor. The highly non-uniform A(x) profile, formed in this way, is retained even after multiple stick-slip events. In Figure 2b we present the loading curve ...
... transforms the initially uniform profile of A(x) to a highly non-uniform one. As shown in [10], large changes in A(x) are generated by each precursor. The highly non-uniform A(x) profile, formed in this way, is retained even after multiple stick-slip events. In Figure 2b we present the loading curve ...
Chapter 10 Elasticity & Oscillations
... structure's natural mode of vibration to produce rapid periodic motion. Flutter can occur in any object within a strong fluid flow, under the conditions that a positive feedback occurs between the structure's natural vibration and the aerodynamic forces. That is, that the vibrational movement of the ...
... structure's natural mode of vibration to produce rapid periodic motion. Flutter can occur in any object within a strong fluid flow, under the conditions that a positive feedback occurs between the structure's natural vibration and the aerodynamic forces. That is, that the vibrational movement of the ...
Persson2006-Contact_mechanics_for_randomly_rough_+
... When two solids are squeezed together they will in general not make atomic contact everywhere within the nominal (or apparent) contact area. This fact has huge practical implications and must be considered in many technological applications. In this paper I briefly review the basic theories of conta ...
... When two solids are squeezed together they will in general not make atomic contact everywhere within the nominal (or apparent) contact area. This fact has huge practical implications and must be considered in many technological applications. In this paper I briefly review the basic theories of conta ...
Chapter 10 Elasticity & Oscillations
... structure's natural mode of vibration to produce rapid periodic motion. Flutter can occur in any object within a strong fluid flow, under the conditions that a positive feedback occurs between the structure's natural vibration and the aerodynamic forces. That is, that the vibrational movement of the ...
... structure's natural mode of vibration to produce rapid periodic motion. Flutter can occur in any object within a strong fluid flow, under the conditions that a positive feedback occurs between the structure's natural vibration and the aerodynamic forces. That is, that the vibrational movement of the ...
Biomimetic design of materials and biomaterials inspired by the
... Considerable work has been carried out on the measurement of the mechanical properties of nacre. One of the first works with such extensive experiments was reported by Currey (1977) on a variety of bivalves, gastropods and cephalopods, where values of tensile, compressive and bending strength, modulu ...
... Considerable work has been carried out on the measurement of the mechanical properties of nacre. One of the first works with such extensive experiments was reported by Currey (1977) on a variety of bivalves, gastropods and cephalopods, where values of tensile, compressive and bending strength, modulu ...
Piezo-Fundamentals.pdf
... This chapter is concerned with piezoelectric materials and their properties. We begin the chapter with a brief overview of some historical milestones, such as the discovery of the piezoelectric effect, the invention of piezoelectric ceramic materials, and commercial and military utilization of the te ...
... This chapter is concerned with piezoelectric materials and their properties. We begin the chapter with a brief overview of some historical milestones, such as the discovery of the piezoelectric effect, the invention of piezoelectric ceramic materials, and commercial and military utilization of the te ...
Structure and Mechanical Properties of Fe-Mn Alloys
... Materials for automobile applications need both the high strength and good ductility. A combination of these beneficial mechanical properties requires sustained high strain hardening rate throughout the course of plasticity. Fe-Mn alloys are a good example of demonstrating such exceptional mechanical ...
... Materials for automobile applications need both the high strength and good ductility. A combination of these beneficial mechanical properties requires sustained high strain hardening rate throughout the course of plasticity. Fe-Mn alloys are a good example of demonstrating such exceptional mechanical ...
Determination of Actual Friction Factors in Metal Forming
... factor in the metal forming processes. However, it is inadvisable to use generic friction maps and tables independent of the type of material and operating conditions, as demonstrated by several authors in the scientific literature [7,18]. Particularly, during any transient metal forming operation, ...
... factor in the metal forming processes. However, it is inadvisable to use generic friction maps and tables independent of the type of material and operating conditions, as demonstrated by several authors in the scientific literature [7,18]. Particularly, during any transient metal forming operation, ...
combined effects of interstitial and laplace pressure in hot isostatic
... Sintering of precompacted metallic and ceramic micro and nanopowders is a complex problem influenced by several factors. We quantify the influence of both local capillary stresses acting at the surface of one pore or particle (usually referred to as Laplace pressure) and the gas pressure in pores du ...
... Sintering of precompacted metallic and ceramic micro and nanopowders is a complex problem influenced by several factors. We quantify the influence of both local capillary stresses acting at the surface of one pore or particle (usually referred to as Laplace pressure) and the gas pressure in pores du ...
Dislocation density evolution upon plastic deformation of Al-Pd
... by two orders of magnitude between the deformations at T ˆ 695 and 8208 C is found. Figure 3 (a) shows a typical bright-® eld electron micrograph of the sample deformed at 7308 C by " plast ˆ 5:2%, which shows the highest deformation-induced dislocation density. Figures 3 (b) and (c) show typical ex ...
... by two orders of magnitude between the deformations at T ˆ 695 and 8208 C is found. Figure 3 (a) shows a typical bright-® eld electron micrograph of the sample deformed at 7308 C by " plast ˆ 5:2%, which shows the highest deformation-induced dislocation density. Figures 3 (b) and (c) show typical ex ...
The impact behaviour of silk cocoons
... our understanding of the material and biochemical properties of their silk fibres (Porter and Vollrath, 2009). More applied silkworm research tends to focus on methods to best extract the silk from the cocoons of the domesticated silkworm Bombyx mori or from wild cocoons (Gheysens et al., 2011; Kund ...
... our understanding of the material and biochemical properties of their silk fibres (Porter and Vollrath, 2009). More applied silkworm research tends to focus on methods to best extract the silk from the cocoons of the domesticated silkworm Bombyx mori or from wild cocoons (Gheysens et al., 2011; Kund ...
Effects of the Laplace pressure and of gas pressure on isostatic
... to get the relationship between the porosity and the Laplace pressure (also denoted as sintering stress)are revisited; furthermore, the model for obtaining such a pressure based on the microscopic dissipation is shown to be compatible with the incompressibility of the matrix if and only if the mater ...
... to get the relationship between the porosity and the Laplace pressure (also denoted as sintering stress)are revisited; furthermore, the model for obtaining such a pressure based on the microscopic dissipation is shown to be compatible with the incompressibility of the matrix if and only if the mater ...
Mechanical Impacts of Corrosion Damage
... work addresses the CM selection criteria, validation of these CMs, and impact of corrosion damage on mechanical properties for relevant alloys. Established pitting, intergranular and exfoliation corrosion models were selected from the literature and validation experiments were carried out on coupons ...
... work addresses the CM selection criteria, validation of these CMs, and impact of corrosion damage on mechanical properties for relevant alloys. Established pitting, intergranular and exfoliation corrosion models were selected from the literature and validation experiments were carried out on coupons ...
Mechanical Properties of Pedal Mucus and Their Consequences for
... breaking strain is approximately 0.035, much lower than the 5-6 typical of hydrated pedal mucus. Accompanying this change in failure parameters is a change in the long term solidity of the mucus. A creep test performed on the mucus at 11.3% hydration (Fig. 1) shows that the compliance of the materia ...
... breaking strain is approximately 0.035, much lower than the 5-6 typical of hydrated pedal mucus. Accompanying this change in failure parameters is a change in the long term solidity of the mucus. A creep test performed on the mucus at 11.3% hydration (Fig. 1) shows that the compliance of the materia ...
structural implications of ultra-high performance fibre
... obtained from a developed finite element model. Using theoretical results and experimental data it is demonstrated that pre-peak behaviour and bending strength are mainly governed by multimicrocracking. The propagation of the macrocrack provides only a minor additional contribution to bending streng ...
... obtained from a developed finite element model. Using theoretical results and experimental data it is demonstrated that pre-peak behaviour and bending strength are mainly governed by multimicrocracking. The propagation of the macrocrack provides only a minor additional contribution to bending streng ...
ElaStic: A universal tool for calculating elastic constants from first
... Elastic properties play a key role in materials science and technology. The elastic tensors at any order are defined by the Taylor expansion of the elastic energy or stress in terms of the applied strain. In this paper, we present ElaStic, a tool which is able to calculate the full second-order elas ...
... Elastic properties play a key role in materials science and technology. The elastic tensors at any order are defined by the Taylor expansion of the elastic energy or stress in terms of the applied strain. In this paper, we present ElaStic, a tool which is able to calculate the full second-order elas ...
Bounding the plastic strength of polycrystalline solids by linear
... resulting surface (3.8) bounds from the outside the strength domain of all polycrystals belonging to that particular subclass—see Nebozhyn et al. (2001). In turn, the computation of the functions v (r) in v requires the solution of the optimization problem (3.3). Since the P (r) are closed convex se ...
... resulting surface (3.8) bounds from the outside the strength domain of all polycrystals belonging to that particular subclass—see Nebozhyn et al. (2001). In turn, the computation of the functions v (r) in v requires the solution of the optimization problem (3.3). Since the P (r) are closed convex se ...
high strain rate behaviour of woven composite
... The thesis centres on the dynamic behaviour of woven composite materials. The increase in the use of these materials in the aerospace industry demands a reliable constitutive damage model to predict their response under high strain rate loading. The current available models do not include rate effec ...
... The thesis centres on the dynamic behaviour of woven composite materials. The increase in the use of these materials in the aerospace industry demands a reliable constitutive damage model to predict their response under high strain rate loading. The current available models do not include rate effec ...
THE EFFECT OF CRYSTALLOGRAPHIC ORIENTATION ON
... Figure 2.9: Variation of the elastic modulus around the (011) crystal face of silicon. The elastic modulus in the [110] and [111] directions are 170 GPa and 190 GPa, respectively. The [111] direction is at an angle of 54.74° from the [100] direction. ................................................. ...
... Figure 2.9: Variation of the elastic modulus around the (011) crystal face of silicon. The elastic modulus in the [110] and [111] directions are 170 GPa and 190 GPa, respectively. The [111] direction is at an angle of 54.74° from the [100] direction. ................................................. ...
Chapter 10 ELASTICITY AND OSCILLATIONS
... Conceptual Questions 1. Young’s modulus does not tell us which is stronger. Instead, it tells us which is more resistant to deformation for a given stress. The ultimate strength would tell us which is stronger—i.e., which can withstand the greatest stress. 2. The pendulum should be lengthened to inc ...
... Conceptual Questions 1. Young’s modulus does not tell us which is stronger. Instead, it tells us which is more resistant to deformation for a given stress. The ultimate strength would tell us which is stronger—i.e., which can withstand the greatest stress. 2. The pendulum should be lengthened to inc ...
On small deformation interfacial debonding in composite materials
... the macroscopic constitutive behavior of high explosive materials subjected to hydrostatic tension. In a separate study, they extended their method to the case of uniaxial tension.25,26 Carpinteri et al.27 investigated snapback instabilities in microstructured composites under uniaxial displacement ...
... the macroscopic constitutive behavior of high explosive materials subjected to hydrostatic tension. In a separate study, they extended their method to the case of uniaxial tension.25,26 Carpinteri et al.27 investigated snapback instabilities in microstructured composites under uniaxial displacement ...
20101007-FNAL-poster - CLASSE Cornell
... that the design of the TPC endplate simultaneously achieves rigidity and stability while minimizing the material contribution upstream of the endcap calorimeter. The requirement for rigidity and stability is driven by the momentum resolution. The unprecedented requirement for charged particle moment ...
... that the design of the TPC endplate simultaneously achieves rigidity and stability while minimizing the material contribution upstream of the endcap calorimeter. The requirement for rigidity and stability is driven by the momentum resolution. The unprecedented requirement for charged particle moment ...
me337_s17
... involves changes in material properties. These changes, which often are adaptive, may be brought about by alterations in modulus, internal structure, strength, or density. for example, bones, and heart muscle may change their internal structures through reorientation of trabeculae and muscle fibers, ...
... involves changes in material properties. These changes, which often are adaptive, may be brought about by alterations in modulus, internal structure, strength, or density. for example, bones, and heart muscle may change their internal structures through reorientation of trabeculae and muscle fibers, ...
Fatigue (material)
In materials science, fatigue is the weakening of a material caused by repeatedly applied loads. It is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. The nominal maximum stress values that cause such damage may be much less than the strength of the material typically quoted as the ultimate tensile stress limit, or the yield stress limit.Fatigue occurs when a material is subjected to repeated loading and unloading. If the loads are above a certain threshold, microscopic cracks will begin to form at the stress concentrators such as the surface, persistent slip bands (PSBs), and grain interfaces. Eventually a crack will reach a critical size, the crack will propagate suddenly, and the structure will fracture. The shape of the structure will significantly affect the fatigue life; square holes or sharp corners will lead to elevated local stresses where fatigue cracks can initiate. Round holes and smooth transitions or fillets will therefore increase the fatigue strength of the structure.