共搜索到3217条信息，每页显示10条信息，共322页。用时：0小时0分0秒552毫秒
......
the criterion developed by KUMAR and PRASAD[7]. The criterion was developed on the basis of the continuity principle applied to large plastic flow by ZIEGLER[8], according to which instability occurs when... stress does not obey the power law, Eq.(12) is incorrect. They have established the simple instability criterion to be applicable for any type of σ vs curve. The instability criterion is depicted......
Instability criterion for the system composed of elastic beam and strain-softening pillar based on gradient-dependent plasticityXuebin WangDept. of Mechanics and Engineering Sciences, Liaoning... in the middle span. An instability criterion is derived analytically based on the energy principle using a known size of localization band according to gradient dependent plasticity. The main advantage......
J. Cent. South Univ. (2012) 19: 1132-1137 DOI: 10.1007/s11771-012-1119-x Improved slope safety analysis by new Druker-Prager type criterion ZHU Jun-gao(朱俊高)1, 2, PENG Kai(彭凯)1, 2, J. F. Shao3, LIU... South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: Based on Mohr-Coulomb (M-C) criterion, the parameters of Druker-Prager (D-P) criterion for geomaterial were determined under......
the instability criteria of system was established to study the interaction between backfill and rock mass, and then the system instability criterion was deduced. The results show... a scientific basis for the rational strength design of backfill mine. Key words: cemented tailings backfill; rock mass; damage constitutive equation; catastrophe theory; match; instability criterion 1......
: nickel coating; instability criterion; forming limit diagram; sheet metal forming ... thickness in the total section thickness, and it has the scope of 0＜λ＜0.5. According to the Swift Instability Theory[14], the instability criterion for the coating sheet in uniaxial tensile loading is dF......
of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410012, China) Abstract: In this work, an instability criterion (maximum strain-rate instability criterion) was proposed to predict forming limit curve (FLC) of sheet metal based on finite element simulation. The criterion analyzed the entire deformation history of all elements......
J. Cent. South Univ. (2019) 26: 1696-1705 DOI: https://doi.org/10.1007/s11771-019-4126-3 Upper bound solution of surrounding rock pressure of shallow tunnel under nonlinear failure criterion ZHANG..., China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract: The nonlinear Baker failure criterion is introduced into the upper-bound limit analysis......
-based superalloy; hot compression; flow instability criterion; processing map 1 Introduction GH79 nickel-based high temperature alloy is a casting high temperature alloy. Its corresponding Russia brand... rates can be obtained by processing map. Therefore, the processing maps have been used in more than 200 alloys [2-7]. At present, most researchers only consider one instability criterion during......
can thus be determined. 2.2 FE simulation with built-in thermomechanical parameter windows After the instability maps are constructed based on the instability criterion inequality (6... metallographic microscope. 3.1.2 Instability maps Based on the unstable deformation criterion designated by the inequality (6) and the flow stresses obtained at different temperatures, strain rates......
