Elastoplastic Plane-Strain Analysis for a Circular Hole in a Uniaxial Tensile Field

1971 ◽  
Vol 38 (3) ◽  
pp. 712-715 ◽  
Author(s):  
O. L. Bowie ◽  
C. E. Freese
Keyword(s):  
Plane Strain ◽  
Circular Hole ◽  
Strain Analysis ◽  
Uniaxial Tensile

C-Specimen Fracture Toughness Testing: Effect of Side Grooves and η Factor

2003 ◽  
Author(s):  
Y. Kim ◽  
Y. J. Chao ◽  
M. J. Pechersky ◽  
M. J. Morgan
Keyword(s):  
Fracture Toughness ◽  
Plane Strain ◽  
Crack Front ◽  
Testing Effect ◽  
Three Dimensional ◽  
Strain Analysis ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
J Integral ◽  
Η Factor

Elastic-plastic crack front fields in arc-shaped tension specimens (C-specimens) were analyzed by a three-dimensional finite element method. The effect of side grooves on the ductile fracture behavior was investigated by studying the J-integral distribution, plane-strain constraint parameter, and development of plastic zones and comparing to experimental data. The applicability of the η factor (derived for use with compact tension specimens) for the calculation of J-integral values for the C-specimen was also investigated. The results show that side grooves promote and establish near plane strain conditions at the crack front in sub-size specimens. It was also found that a two-dimensional plane-strain analysis in conjunction with the standard American Society for Testing and Materials (ASTM) tests was sufficient to determine the fracture toughness values from side-grooved C-specimen. The results indicate the η factor for compact tension specimen as specified in the ASTM standards appears to produce reliable results for the calculation of J of C-specimens.

Strain Analysis of Bimetal Material Based on Uniaxial Tensile and ANSYS

2014 ◽  
Vol 988 ◽  
pp. 27-30 ◽  
Author(s):  
De Hai Zhang ◽  
Duan Qin Zhang ◽  
Yan Qin Li ◽  
Jian Xiu Liu ◽  
Dai Ping Bai ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Strain Analysis ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Theoretic Analysis ◽  
Combined Method ◽  
Experiment Research ◽  
Test Experiment ◽  
Existing Problems ◽  
Semi Solid

With a combined method of theoretic analysis, numerical simulation and uniaxial tensile test experiment research, the properties of bimetal materials are system studied. The researches are concentrated on the followings contexts:The fabricating method of bimetal materials by semi-solid compressive joining is studied by ANSYS, and then the tensile property relationships of the clad material are established. The stress and their strains alongx,yandzdirections of the clad material are analyzed, respectively. The different performance of composite materials, find materials conform to the existing problems so as to optimize treatment.

Generalized plane strain analysis of superconducting solenoids

1999 ◽  
Vol 86 (12) ◽  
pp. 7039-7051 ◽  
Author(s):  
W. Denis Markiewicz ◽  
Mohammad Reza Vaghar ◽  
Iain R. Dixon ◽  
Hamid Garmestani
Keyword(s):  
Plane Strain ◽  
Strain Analysis ◽  
Generalized Plane Strain

Biomechanical and Elastographic Analysis of Mesenchymal Stromal Cell Treated Tissue Following Surgery

2010 ◽  
Vol 132 (7) ◽  
Author(s):  
Hazel Marie ◽  
Yong Zhang ◽  
Jeremy Heffner ◽  
Heath A. Dorion ◽  
Diana L. Fagan
Keyword(s):  
Mechanical Property ◽  
Tensile Test ◽  
Tensile Testing ◽  
Recovery Period ◽  
Strain Analysis ◽  
Biomechanical Properties ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Ongoing Research ◽  
Uniaxial Tensile Testing

Hernia repair continues to be a problem facing surgeons today, particularly because of the high incidence of reoccurrence. This work presents preliminary data of a pioneering effort to investigate the effect of mesenchymal stromal cells (MSCs) on mechanical property enhancement in full thickness fascial defects. Heparinized MSCs harvested from a rabbit’s tibia/iliac crest were applied to two fascial defects on the rabbit’s abdominal wall, with two other defects acting as controls (no MSCs added). After an 8 week recovery period, the entire abdominal fascia was harvested for mechanical property testing and elastographic strain analysis. Preliminary results from uniaxial tensile testing indicate a significant increase in the modulus of toughness strain energy, with at least a 50% increase in the MSC treated defects as compared with the control defects. Results from the elastographic strain analysis show excellent correlation in the calibration of the elastography to the uniaxial tensile test, with nearly identical moduli of elasticity. In addition, the elastographs clearly show tissue property heterogeneity at all stages of tensile testing. The MSC treated tissue demonstrates promise of enhanced material properties over that of the nontreated tissue; testing and analysis is ongoing. The elastography provides pixel-level description of tissue property variations providing critical information on wound healing effectiveness that would be impossible with other methods. In the ongoing research, optical elastography, in combination with the traditional tensile test and tissue histology, will be used to characterize localized biomechanical properties directly within the defect area and to locate “crack” initiation and propagation sights as the material is strained to rupture.

An evaluation of simplified techniques for estimating three-dimensional undrained ground movements due to tunnelling in soft soils

1992 ◽  
Vol 29 (1) ◽  
pp. 39-52 ◽  
Author(s):  
R. K. Rowe ◽  
K. M. Lee
Keyword(s):  
Plane Strain ◽  
Deformation Behaviour ◽  
Three Dimensional ◽  
Strain Analysis ◽  
Cumulative Probability ◽  
Element Analysis ◽  
Cross Sectional ◽  
Soft Soils ◽  
Longitudinal Plane ◽  
Stress Changes

A number of simplified approaches have been used by various researchers to estimate the three-dimensional stress changes and ground deformations due to shallow tunnels in soft soils. The effectiveness of these simplified analyses, such as (i) axisymmetric analysis, (ii) longitudinal plane strain analysis, and (iii) empirical cumulative probability distribution approach, has been examined by comparison of results with those from a full three-dimensional elastoplastic finite-element analysis. For tunnels located at shallow depths, axisymmetric analyses are generally found to be unable to predict the correct magnitude of displacement around a tunnel heading. However, the trend of the three-dimensional deformation behaviour near the tunnel heading can be reasonably approximated by the average of the normalized displacement curves predicted by the two axisymmetric assumptions as described in this paper. The three-dimensional distribution of the displacement near the ground surface, on the other hand, can be approximately predicted by the cumulative probability approach, provided that the three empirical parameters required by the equations are reasonably estimated. In this paper, these parameters were estimated from the result of a two-dimensional plane strain cross-sectional analysis. Finally, it was found that modelling of three-dimensional deformations by a longitudinal plane strain analysis did not give good results for the cases examined. Key words : tunnelling, soft ground, analysis.

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