Relevant bibliographies by topics / Mean strain effect

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Academic literature on the topic 'Mean strain effect'

Author: Grafiati
Published: 27 April 2023

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Journal articles on the topic "Mean strain effect"

1

Guo, Yi, Yun Rong Luo, and Qing Yuan Wang. "Mean Strain Effect on the Cyclic Stress-Strain Behavior of Steel Structure Materials Q235." Advanced Materials Research 602-604 (December 2012): 430–34. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.430.

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The low cycle fatigue (LCF) behavior of Q235 steel under mean strain control has been investigated. A serious of the strain controlled cyclic loading experiments with several combinations of strain amplitudes and mean strains have been performed. Significant cyclic hardening and mean stress relaxation were observed in all cases. Fractography by scanning electron microscopy (SEM) was used to determine the LCF failure mechanisms and fatigue crack propagation modes of the Q235 steel.
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2

Ellyin, F. "Effect of Tensile-Mean-Strain on Plastic Strain Energy and Cyclic Response." Journal of Engineering Materials and Technology 107, no. 2 (1985): 119–25. http://dx.doi.org/10.1115/1.3225786.

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Tests have been conducted to determine the effect of tensile-mean-strain on cyclic properties, low cycle fatigue, and total absorbed plastic strain energy to failure of ASTM A-516 Grade 70 carbon low alloy steel. Stable hysteresis loops at half-life are presented for different strain controlled tests. The cyclic properties were determined by a least squares fit technique. The results of tensile-mean-strain are compared with fully-reversed fatigue tests. The absorbed plastic strain energy per cycle was measured and compared with a proposed relationship for non-Masing material behavior. A relationship of the form Wf=KNfα is found to be a good representation of the data. It is observed that the material tends toward a steady-state condition independent of the level of the mean strain provided the fatigue life is greater than one thousand cycles.
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3

Butler, James P., Hiroshi Miki, Stephanie Squarcia, Rick A. Rogers, and John L. Lehr. "Effect of macroscopic deformation on lung microstructure." Journal of Applied Physiology 81, no. 4 (1996): 1792–99. http://dx.doi.org/10.1152/jappl.1996.81.4.1792.

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Butler, James P., Hiroshi Miki, Stephanie Squarcia, Rick A. Rogers, and John L. Lehr. Effect of macroscopic deformation on lung microstructure. J. Appl. Physiol.81(4): 1792–1799, 1996.—Using an anisotropic theory of diffuse light scattering in lungs, we measured the fractional changes in geometric mean linear intercepts in orthogonal directions when freshly excised rabbit lungs were subjected to isovolume uniaxial strains. Results from the optical technique were compared with morphometric estimates of fractional changes in mean linear intercepts from the same strained and unstrained (control) lobes, with the conclusion that diffuse light scattering is adequate to estimate changes in mean free paths in different directions. We compared optical estimates of fractional changes in mean linear intercepts with the macroscopic strain field measured by displacements of pleural markers; this relationship did not significantly differ from the line of identity. We conclude that the microscopic strain field is closely matched to the macroscopic strain field during uniaxial distortion. This suggests that surface reorientation may not play a large role in the origin of the low shear modulus of the lung, but this cannot be definitively stated without comparison of these experimental results to specific model predictions of the changes in mean linear intercepts in shear deformation.
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4

IINO, Jun, Hideshi HANAZAKI, and Yasuaki KOHAMA. "The Effect of Mean Strain on the Stably Stratified Turbulence." Transactions of the Japan Society of Mechanical Engineers Series B 67, no. 664 (2001): 3068–75. http://dx.doi.org/10.1299/kikaib.67.3068.

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5

Scorza, Daniela, Andrea Carpinteri, Giovanni Fortese, Camilla Ronchei, Sabrina Vantadori, and Andrea Zanichelli. "Multiaxial fatigue life estimation in low-cycle fatigue regime including the mean stress effect." MATEC Web of Conferences 165 (2018): 16002. http://dx.doi.org/10.1051/matecconf/201816516002.

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The goal of the present paper is to discuss the reliability of a strain-based multiaxial Low-Cycle Fatigue (LCF) criterion in estimating the fatigue lifetime of metallic structural components subjected to multiaxial sinusoidal loading with zero and non-zero mean value. Since it is well-known that a tensile mean normal stress reduces the fatigue life of structural components, three different models available in the literature are implemented in the present criterion in order to take into account the above mean stress effect. In particular, such a criterion is formulated in terms of strains by employing the displacement components acting on the critical plane and, then, by defining an equivalent strain related to such a plane. The Morrow model, the Smith-Watson-Topper model and the Manson-Halford model are applied to define such an equivalent strain. The effectiveness of the new formulations is evaluated through comparison with some experimental data reported in the literature, related to biaxial fatigue tests performed on metallic specimens under in-and out-of-phase loadings characterised by non-zero mean stress values.
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6

Yip, Ming-Chuen, and Yi-Ming Jen. "Mean Strain Effect on Crack Initiation Lives for Notched Specimens Under Biaxial Nonproportional Loading Paths." Journal of Engineering Materials and Technology 119, no. 1 (1997): 104–12. http://dx.doi.org/10.1115/1.2805962.

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This paper discusses the mean strain effect on the crack initiation lives for notched specimens under biaxial nonproportional loading paths. Elastic-plastic finite element method was used to evaluate the local stresses and strains. Several prediction models related to the mean stress/strain effect were employed to correlate the experimental results with reference fatigue data for smooth specimens. It is found that Fatemi-Socie model gives good prediction for the present research with the assistance of finite element method. The stress behavior in this deflection-controlled tests is discussed in this study, and the failure surfaces are also examined after tests.
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7

de Beeck, Hanne Op, Lieven J. R. Pauwels, and Johan Put. "Schools, strain and offending: Testing a school contextual version of General Strain Theory." European Journal of Criminology 9, no. 1 (2012): 52–72. http://dx.doi.org/10.1177/1477370811421646.

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Based on the idea that schools are important socializing settings for adolescents (Gottfredson, 2001), the school contextual version of General Strain Theory (Agnew, 1999) is tested in this article. The main hypothesis of this study is that strain at the school level affects individual offending by creating individual strain. Findings suggest that school contextual effects differ: convincing contextual effects are found for violent offending but not for general offending. Furthermore, although the school mean level of strain does significantly affect individual violent offending, this effect does not proceed by creating individual strain. It is therefore suggested that the school mean level of strain either has a direct effect on violent offending or influences other important individual offending mechanisms such as social learning or lifestyle risks.
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8

Natesan, Elanghovan, Johan Ahlström, Stefan Eriksson, and Christer Persson. "Effects of Temperature on the Evolution of Yield Surface and Stress Asymmetry in A356–T7 Cast Aluminium Alloy." Materials 14, no. 24 (2021): 7898. http://dx.doi.org/10.3390/ma14247898.

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As the electrification of vehicle powertrains takes prominence to meet stringent emission norms, parts of internal combustion engines like cylinder heads are subjected to an increased number of thermal load cycles. The cost-effective design of such structures subjected to cyclic thermo-mechanical loads relies on the development of accurate material models capable of describing the continuum deformation behaviour of the material. This study investigates the effect of temperature on the evolution of flow stress under cyclic loading in A356-T7 + 0.5% Cu cast aluminium alloy commonly used in modern internal combustion engine cylinder heads. The material exhibits peak stress and flow stress asymmetry with the stress response and flow stress of the material under compressive loading higher than under tension. This peak and flow stress asymmetry decrease with an increase in temperature. To compare this stress asymmetry against conventional steel, cyclic strain-controlled fatigue tests are run on fully pearlitic R260 railway steel material. To study the effect of mean strain on the cyclic mean stress evolution and fatigue behaviour of the alloy, tests with tensile and compressive mean strains of +0.2% and −0.2% are compared against fully reversed (Rε = −1) strain-controlled tests. The material exhibits greater stress asymmetry between the peak tensile and peak compressive stresses for the strain-controlled tests with a compressive mean strain than the tests with an identical magnitude tensile mean strain. The material exhibits mean stress relaxation at all temperatures. Reduced durability of the material is observed for the tests with tensile mean strains at lower test temperatures of up to 150 °C. The tensile mean strains at elevated temperatures do not exhibit such a detrimental effect on the endurance limit of the material.
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9

Kang, Jidong, Liting Shi, Jie Liang, Babak Shalchi-Amirkhiz, and Colin Scott. "The Influence of Specimen Geometry and Strain Rate on the Portevin-Le Chatelier Effect and Fracture in an Austenitic FeMnC TWIP Steel." Metals 10, no. 9 (2020): 1201. http://dx.doi.org/10.3390/met10091201.

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We studied the Portevin-Le Chatelier effect and fracture behavior of a FeMnC TWIP steel using high speed digital image correlation by varying the specimen geometry (flat vs. round) and test strain rate (0.001 vs. 0.1 s−1). The results show that the mean flow stress, the mean strain hardening rate and the mean strain rate sensitivity parameters are all independent of the specimen geometry and are uncorrelated with the presence or not of Portevin-Le Chatelier (PLC) bands, the type of PLC bands observed or the critical strain for band formation. However, both the fracture strains and stresses and the PLC behavior are highly geometry and/or strain rate dependent. Dynamic strain aging (DSA) and in particular the presence of PLC instabilities appears to play an important but as yet unclear role in promoting premature necking and final fracture.
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10

Warley, R. L., D. L. Feke, and I. Manas-Zloczower. "Transient effects in dynamic modulus measurement of silicone rubber, part 2: Effect of mean strains and strain history." Journal of Applied Polymer Science 104, no. 4 (2007): 2197–204. http://dx.doi.org/10.1002/app.25136.

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