scholarly journals Elastoplastic Stress-Strain Relationship for Loose Sands with Anisotropic Fabric Under Three-Dimensional Stress Conditions

1984 ◽  
Vol 24 (2) ◽  
pp. 43-57 ◽  
Author(s):  
Seiichi Miura ◽  
Shosuke Toki
Keyword(s):  
Three Dimensional ◽  
Stress Conditions ◽  
Stress Strain ◽  
Elastoplastic Stress ◽  
Strain Relationship

STRESS-STRAIN RELATIONSHIP OF ZR55AL10NI5CU30 METALLIC GLASS ANALYZED BY 3D IMAGES ON SPHERICAL INDENTS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2453-2458 ◽  
Author(s):  
YUN-HEE LEE ◽  
JONG SEO PARK ◽  
HAE MOO LEE ◽  
SEUNG HOON NAHM
Keyword(s):  
Metallic Glass ◽  
Metallic Glasses ◽  
Three Dimensional ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Polished Surface ◽  
Flow Properties ◽  
Stress Strain ◽  
Strain Relationship ◽  
Relationship Of

Mechanically polished surface of Zr 55 Al 10 Ni 5 Cu 30 metallic glass was indented with a rigid ball 0.5 mm in diameter and its corresponding load-depth curve was recorded automatically. Although a stress-strain relationship beneath the indenter can be analyzed from the raw indentation curve, the current analysis developed for crystalline solids can mislead erroneous properties because it does not consider significant material pile-ups in amorphous metallic glasses. Thus, we proposed a novel indent image processing technique for characterizing the contact and flow properties in the metallic glasses; the contact area was measured by differentiating a three-dimensional indent morphology digitized by a surface profiler and a surface-stretching strain was newly defined in order to estimate the flow properties. Finally, the work-hardening index estimated was about 0.05, comparable with the typical value measured from uniaxial compression in the Zr -based metallic glass.

Triaxial Test and Numerical Analysis on the Fiber Reinforced Laterite Clay

2013 ◽  
Vol 275-277 ◽  
pp. 1219-1224 ◽  
Author(s):  
Jin Li Zhang ◽  
Man Yuan ◽  
Zheng Guo Jiang ◽  
Qing Yang
Keyword(s):  
Three Dimensional ◽  
Calculation Model ◽  
Secondary Development ◽  
Triaxial Tests ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Nonlinear Fitting ◽  
Strain Relationship ◽  
Straight Lines ◽  
Relationship Of

Triaxial compressive tests were performed on laterite clay(LC) reinforced with different fiber contents and lengths. It was observed that the curves of stress-strain have a segmented characteristic at the critical strain. The stress-strain curves of fiber reinforced laterite clay(FRLC) were expressed by the combination of hyperbola and straight lines. The parameters of stress-strain curves were obtained by linear and nonlinear fitting method with experimental results. A three-dimensional calculation model of triaxial tests was developed on the basis of ABAQUS software. To express the stress-strain relationship of hyperbola-straight lines, user’s subroutine was established through secondary development. Based on the test conditions, a large number of calculations were conducted. There is a good agreement between the results of numerical calculations and tests. It shows that the stress-strain relationship of FRLC can be described by the hyperbola-straight line combination model.

Introduction to Stress-Strain Relationship and Its Measurement Techniques

2020 ◽  
pp. 22-38
Author(s):  
Karthik Selva Kumar Karuppasamy ◽  
Balaji P. S. ◽  
Niranjan Sahoo
Keyword(s):  
Measurement Techniques ◽  
Three Dimensional ◽  
Stress And Strain ◽  
Stress Strain ◽  
Geometric Quantity ◽  
Strain Relationship ◽  
Strain Stress ◽  
The Subject ◽  
Basic Concepts ◽  
Principal Strains

In this chapter, the basic concepts of strain and the subject of components deformation and associated strain is proposed to be briefly discussed. The strain is a pure geometric quantity so there will be no limitation on the material of the component is required. The significant aspects related to strain and stress-strain relationship briefly discussed in this proposed chapter were as follows: displacement and strain, principal strains, compatibility equations, relationship between stress and strain, two and three dimensional state of stress with respect to strain, stress-strain relationship curve, and overview of various experimental techniques employed for the measurement of stress and strain respectively.

scholarly journals On the objectivity of the nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites

2021 ◽  
Vol 127 (1) ◽  
Author(s):  
Shuguang Li ◽  
Mingming Xu ◽  
Shibo Yan ◽  
Elena Sitnikova
Keyword(s):  
Shear Stress ◽  
Stress Conditions ◽  
Reinforced Composites ◽  
Stress Strain ◽  
Consistent Manner ◽  
Strain Relationship ◽  
Complementary Strain ◽  
Stress States ◽  
New Formulation ◽  
Fibre Reinforced Composites

AbstractThe nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites has been investigated in this paper aiming at its applications in general 3D stress conditions in a consistent manner. So far, such relationship has only been addressed in plane stress conditions. In this paper, it has been shown that its straightforward generalisation to 3D stress states lacks objectivity, which is a basic requirement for all theoretical studies of physical problems. A new formulation is proposed based on the stress invariants and the complementary strain energy guided by the rational theoretical framework of nonlinear elasticity. A consistent and objective stress–strain relationship has been obtained and verified through an example of application to a torsion problem.

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