نتایج جستجو برای: orthotropic yield criterion
تعداد نتایج: 271040 فیلتر نتایج به سال:
Accurate model of structural elements is necessary to model the foliage and fruit distributions in cultivated plants, both of them being key parameters for yield prediction. However, the level of details in architectural data collection could vary, simplifying the data collection when plants get older and because of the high time cost required. In the present study, we aimed at reconstructing a...
A yield criterion, not previously compared with the actual macroscopic behaviour of polymers, is herein compared with the pressure-modified octahedral shear stress criterion earlier suggested by others.This new relation, which is a version of the von Mises criterion, accommodates differences in tensile and compressive yield strengths and accounts for any dependence of yielding on the hydrostati...
The evaluation of the roof collapse in tunnels or cavities remains one most complex issues geotechnical engineering. Taking detaching surface tunnel as an orthotropic weak interlayer, analytical approach for determining limit range considering arch effect is presented this paper by variation calculus. A discontinuity criterion moving from anisotropic proposed present authors applied to interlay...
The anisotropic properties and pressure sensitivity are intrinsic features of the constitutive response fiber network materials. Although advanced models have been developed to simulate complex fibrous materials, lack comparative studies may lead a dubiety regarding selection suitable method. In this study, pressure-sensitive Hoffman yield criterion Xia model implemented for plane stress case m...
In this paper, static and free vibrations behaviors of the orthotropic functionally graded material (FGM) plates resting on the two-parameter elastic foundation are analyzed by the a mesh-free method based on the first order shear deformation plate theory (FSDT). The mesh-free method is based on moving least squares (MLS) shape functions and essential boundary conditions are imposed by transfer...
In recent years, the construction industry has seen a greater focus on use of sustainable materials to reduce environmental impact buildings. Timber is one such material that revival in its due credentials coupled with advances manufacture engineered wood products and connection technologies. While timber have high strength-to-weight ratio suitable for large scale construction, an orthotropic d...
Steady-state creep response in a rotating disc made of Al-SiC particle composite having linearly varying thickness has been carried out using isotropic/anisotropic Hoffman yield criterion and results are comparedwith those using vonMises yield criterion/Hill’s criterion ignoring difference in yield stresses. The steady-state creep behavior has been described by Sherby’s creep law. The material ...
Vertical rolling is an important technique used to control the width of continuous casting slabs in hot-rolling field. Accurate prediction vertical force a core point maintaining rolling-mill equipment. Owing limitation algorithm use, accuracy most models based on energy method can only reach more than 10%. Therefore, it challenging optimize rolling-force model improve accuracy. An innovative a...
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