Physical mesomechanics of materials

Panin, V. E.; Коротаев, А. Д.; Макаров, П. В.; Kuznetsov, V. M.

doi:10.1007/bf02508720

Cited by 37 publications

(30 citation statements)

References 15 publications

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“…Meso-scale was first introduced by Panin et al [8] as an approach of modeling properties (density, young modulus, shear modulus, poisson ratio, etc) and the deformation and failure mechanisms of structural and functional materials at different scale levels, with different loads. In meso-scale continuum mechanics size matters, as plastic flow processes in crystalline solids are inherently size dependent over a scale that ranges from a fraction of a micrometer to 100 mm.…”

Section: Meso-scale Modelingmentioning

confidence: 99%

Meso-scale Modeling of the Drilling of Carbon Fibre Reinforced Plastic: Geometry and Numerical Analysis

Al-wandi¹,

Pan²,

Ding³

et al. 2016

ujme

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This paper discussed the 3D finite element modeling (FEM) of the drilling of uni-directional Carbon Fibre Reinforced Plastic (CFRP). Most of the real life parts of CFRP are modeled with single layer shell element and can be modeled as composite by assigning a composite property to it. A Meso-Scale (Laminate Level) approach has been developed to extract displacements, overall stiffness behavior, and detailed stresses and strains. The objective of this study is to implement a ply-based modeling technology to model the laminates and to analyze the interaction mechanisms between the drilling tool and material to validate if the meso-scale approach would be the ideal solution to characterize the drilling induced damage. Results show the model has proved its ability to correctly estimate the thrust force and torque.

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Section: Meso-scale Modelingmentioning

confidence: 99%

Meso-scale Modeling of the Drilling of Carbon Fibre Reinforced Plastic: Geometry and Numerical Analysis

Al-wandi¹,

Pan²,

Ding³

et al. 2016

ujme

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“…Since numerical modeling of the anisotropy of the physicochemical properties of crystals and the conditions at their boundaries involves some difficulties, it is necessary to develop experimental methods of analysis of displacement fields, in particular, optical methods. The results of application of the speckle-photography method to investigation of the displacement fields on a surface of plane polycrystalline specimens are known [4,5]. The pointwise scanning method used in these studies to interpret specklograms is labor-consuming and does not allow one to obtain the fields of isolines of constant phase difference on the surface of a specimen.…”

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confidence: 99%

“…We use the experimental patterns of the fields of local displacements ~/zy and local rotations ~: to verify the assumption of the wave nature of plastic strain [4,5]. Figure 3 shows distributions of these components on the longitudinal symmetry axis of the specimen as the specimen total strain increases from 0.58 to 0.70%.…”

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confidence: 99%

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Strain analysis of polycrystalline specimens by the method of superimposed holographic interferometry

Герасимов¹,

Zhilkin²

2000

J Appl Mech Tech Phys

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A new experimental method for analysis of the mechanical properties of crystal materials is proposed. The method combines the advantages of holographic interferometry and the contact method of fixing a recording medium. The proposed approach is shown to be effective in determining the surface displacements and strains.Introduction. The behavior of loaded polycrystalline bodies is modelled numerically in [1][2][3]. Since numerical modeling of the anisotropy of the physicochemical properties of crystals and the conditions at their boundaries involves some difficulties, it is necessary to develop experimental methods of analysis of displacement fields, in particular, optical methods. The results of application of the speckle-photography method to investigation of the displacement fields on a surface of plane polycrystalline specimens are known [4,5]. The pointwise scanning method used in these studies to interpret specklograms is labor-consuming and does not allow one to obtain the fields of isolines of constant phase difference on the surface of a specimen. In contrast to the speckle-photographic method, the superimposed holographic interferometry makes it possible to visualize the displacement fields with higher spatial resolution and sensitivity [6].1. Preparation of Specimens. Specimens of working length 100 mm and cross section 16.2 • 1.5 mm were milled from commercial aluminum. Then, they were extended on a TsDM-5/91 testing machine, since it has been found experimentally that upon annealing and recrystallization the maximum grain size in a specimen is obtained for a 3% initial strain of the specimen. The elongation of the specimens was measured by a V-630 cathetometer. Annealing was performed for three hours at 630~ in a quartz tube inserted into the working zone of an SUOL muffle furnace. The specimens were cooled for 14 h in the furnace switched off. The specimens were pickled in a strong solution of sodium hydroxide NaOH for 40-60 min. Pickling was terminated if a white film separated independently from the surface of the specimens when they were taken out from a dish.To determine the grain boundaries on the surface, the specimens were photographed before the experiment for various directions of their illumination (the optical axis of the camera was perpendicular to the specimen surface). Then, the metallized crossed rasters with the line frequency ~bz = ~by --~b = 840 mm -1 were deposited on the specimen surface. The arrangement of the grains on one of the specimen surfaces is shown in Fig. 1. 2. Strains in Metal Grains under Static Loading. Physical Modeling. The experimental technique is outlined in [6]. Holographic interferograms were recorded at each of 11 stages of specimen loading by a tensile force P. The specimen elongation A1 was monitored by a clock-type indicator whose division was 0.01 mm. The hologram numbers n, the loads P applied to a specimen, and its elongations Al are listed in Table 1.

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“…The relationships governing the deformation of the material in the loading process in the tensile loading of the specimen were investigated using an optical-television measuring system (OTMS), developed at the Institute of Physics of Strength of Materials, Siberian Division of the Russian Academy of Sciences. 5 The operating principle of the system enables all the changes of the microrelief of the surface of the deformed specimen to be determined on the basis of the internal state of the material. 6 The composition of the OTMS includes an optical microscope, a television camera, a computer and a unit of specialised interfaces (USI).…”

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confidence: 99%

Effect of localisation of plastic deformation on the kinetics of failure of specimens of welded joints

Saraev

Makarova

Kirilova

et al. 2000

Welding International

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Physical mesomechanics of materials

Cited by 37 publications

References 15 publications

Meso-scale Modeling of the Drilling of Carbon Fibre Reinforced Plastic: Geometry and Numerical Analysis

Meso-scale Modeling of the Drilling of Carbon Fibre Reinforced Plastic: Geometry and Numerical Analysis

Strain analysis of polycrystalline specimens by the method of superimposed holographic interferometry

Effect of localisation of plastic deformation on the kinetics of failure of specimens of welded joints

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