scholarly journals SPH as a nonlocal regularisation method: Solution for instabilities due to strain-softening

2014 ◽  
Vol 277 ◽  
pp. 281-304 ◽  
Author(s):  
R. Vignjevic ◽  
N. Djordjevic ◽  
S. Gemkow ◽  
T. De Vuyst ◽  
J. Campbell
Keyword(s):  
Strain Softening ◽  
Regularisation Method

Large Deformation Finite Element Analysis of Riser-Soil Interactions with Strain-Softening Soils

2019 ◽  
Author(s):  
Jinbo Chen ◽  
Jason A. Newlin ◽  
Heping Zhang ◽  
Shuang Hu ◽  
Meng Luo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformation ◽  
Strain Softening ◽  
Element Analysis

Rate Dependent Constitutive Equations of Cyclic Softening

1985 ◽  
Vol 40 (7) ◽  
pp. 653-665
Author(s):  
J. S. Mshana ◽  
A. S. Krausz
Keyword(s):  
Stress Relaxation ◽  
Low Temperature ◽  
Constitutive Equations ◽  
Strain Softening ◽  
Structural Characteristics ◽  
High Stress ◽  
Cyclic Strain ◽  
Cyclic Stress ◽  
Cyclic Softening ◽  
Stress Softening

Constitutive equations of cyclic strain and stress softening for materials with low internal stress levels are derived from the rate theory. The study shows that over the high stress and low temperature range where the description of plastic flow in cyclic softening can be approximated with activation over a single energy barrier, cyclic strain softening is well related to stress relaxation process while cyclic stress softening is related to creep process. The material structural characteristics for cyclic strain softening, cyclic stress softening and stress relaxation are identical. Subsequently, it is shown that cyclic stress and strain softening within the high stress and low temperature range can be evaluated from the constitutive equations using the material structural characteristics measured from a simple stress relaxation test.

Numerical solutions for strain-softening surrounding rock under three-dimensional principal stress condition

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sheng Yu-ming ◽  
Li Chao ◽  
Xia Ming-yao ◽  
Zou Jin-feng
Keyword(s):  
Finite Element ◽  
Principal Stress ◽  
Stress Condition ◽  
Strain Softening ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Strength Criterion ◽  
Surrounding Rock ◽  
Flow Rule ◽  
Finite Element Software

Abstract In this study, elastoplastic model for the surrounding rock of axisymmetric circular tunnel is investigated under three-dimensional (3D) principal stress states. Novel numerical solutions for strain-softening surrounding rock were first proposed based on the modified 3D Hoek–Brown criterion and the associated flow rule. Under a 3D axisymmetric coordinate system, the distributions for stresses and displacement can be effectively determined on the basis of the redeveloped stress increment approach. The modified 3D Hoek–Brown strength criterion is also embedded into finite element software to characterize the yielding state of surrounding rock based on the modified yield surface and stress renewal algorithm. The Euler implicit constitutive integral algorithm and the consistent tangent stiffness matrix are reconstructed in terms of the 3D Hoek–Brown strength criterion. Therefore, the numerical solutions and finite element method (FEM) models for the deep buried tunnel under 3D principal stress condition are presented, so that the stability analysis of surrounding rock can be conducted in a direct and convenient way. The reliability of the proposed solutions was verified by comparison of the principal stresses obtained by the developed numerical approach and FEM model. From a practical point of view, the proposed approach can also be applied for the determination of ground response curve of the tunnel, which shows a satisfying accuracy compared with the measuring data.

The effect of the shape of the strain-softening diagram on the bearing capacity of concrete beams

1987 ◽  
Vol 20 (6) ◽  
pp. 448-454 ◽  
Author(s):  
A. M. Alvaredo ◽  
R. J. Torrent
Keyword(s):  
Bearing Capacity ◽  
Strain Softening ◽  
Concrete Beams

Roles of lithospheric strain softening and heterogeneity in determining the geometry of rifts and continental margins

2007 ◽  
Vol 282 (1) ◽  
pp. 111-138 ◽  
Author(s):  
R. S. Huismans ◽  
C. Beaumont
Keyword(s):  
Strain Softening ◽  
Continental Margins

Strain Softening of Bimodal Isoprene Rubber Vulcanizates

2021 ◽  
pp. 2000802
Author(s):  
Fengyi Hou ◽  
Zhijie Xia ◽  
Yihu Song ◽  
Wei Chen ◽  
Qiang Zheng
Keyword(s):  
Strain Softening ◽  
Isoprene Rubber

scholarly journals Modelling of strain softening materials based on equivalent damage force

2018 ◽  
Vol 335 ◽  
pp. 52-68 ◽  
Author(s):  
Rade Vignjevic ◽  
Nenad Djordjevic ◽  
Tom De Vuyst ◽  
Simone Gemkow
Keyword(s):  
Strain Softening
Sign in / Sign up

Export Citation Format

Share Document