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-softening functions were given. Then, they were introduced to an endochronic elastoplastic constitutive equation in order to obtain the constitutive description involving void evolution of the material... elastoplastic constitutive equation[16], which can describe the constitutive behavior of materials without a yield surface with favorable precision, yields the following incremental constitutive equation......
J. Cent. South Univ. (2020) 27: 911-919 DOI: https://doi.org/10.1007/s11771-020-4340-z Gradation equation of coarse-grained soil and its applicability WU Er-lu(吴二鲁)1, 2, ZHU Jun-gao(朱俊高)1, 2, CHEN... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Gradation equation is one way to describe the gradation of coarse-grained soil conveniently, exactly......
behavior HAN Shi-fang(韩式方) (Chengdu Institute of Computer Application, Chinese Academy of Sciences, Chengdu 610041, China) Abstract: Research advances of un-symmetric constitutive equation... gradient tensor D in the classic Leslie-Ericksen continuum theory. Two relaxation times analyzing rheological nature of the fluid and using tensor analysis a general form of the constitutive equation......
. As for the verification example given in this paper, the hyperbolic sine constitutive equation was used as the material model. The friction behavior was considered rough during direct simulation... of a model using a functional form (e.g. constitutive equation) and the corresponding experimental data (e.g. results of a mechanical test)[8]. The problem was formulated as a least square problem[9]: Find......
, then a balance is established between the tendency to work harden and the tendency to flow soften. The stress curves appear almost in flat shape. A constitutive equation in the hyperbolic sine... not be more than 500 °C in order to avoid primary silicon coarsen.Key words:spray forming; Al-Si alloy; hot deformation behavior; constitutive equation......
Trans. Nonferrous Met. Soc. China 29(2019) 2252-2261 Deformation characteristics and strain-compensated constitutive equation for AA5083 aluminum alloy under hot compression Qing-song DAI1,2, Yun-lai... the flow stress is decreased. To predict the flow behavior under different deformation conditions, a strain-compensated constitutive equation based on Arrhenius- type equation and Zener–Hollomon......
deformation temperature and decreasing strain rate. The constitutive equation for flow stress of Q345E is formulated by Arrihenius equation and the modified Zener-Hollomon parameter considering the compensation of both strain and strain rate. The flow stress values predicted by the constitutive equation agree well with the experimental values, realizing the accurate prediction of the flow stress of Q345E......
that increases uniformly, in this work, the general Hooke’s law was employed to establish the nonlinear seepage-stress coupling constitutive equation of the soft rock. Such a model can be written...J. Cent. South Univ. Technol. (2009) 16: 0149-0153 DOI: 10.1007/s11771-009-0025-3 Seepage-stress coupling constitutive model of anisotropic soft rock ZHANG Xiang-xia(张向霞)1, 2, YANG Lin-de(杨林德)2......
possess hysteresis loops showing both viscoelasticity and thixotropy. It is proved that the flow curves are characterized by the co-rotational Jeffreys constitutive equation correctly. Key words: dimeric surfactant; viscoelastic micelle; clean fracturing fluid; constitutive equation 1 Introduction Hydraulic fracturing treatment is an important technology to stimulate the reservoir with low......
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