scholarly journals Analysis of Stress-Strain Curve of Material Containing Bubbles on Grain Boundary by Two Dimensional Elastic-Plastic Finite Element Method

1997 ◽  
Vol 61 (3) ◽  
pp. 199-208 ◽  
Author(s):  
Haruki Shiraishi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Grain Boundary ◽  
Strain Curve ◽  
Two Dimensional ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Elastic Plastic ◽  
Element Method

Effect of Circular Hole Notch Size on Strength Characteristics of CFRP/AL7075 Hybrid Composites

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1788-1794
Author(s):  
Han Ki Yoon ◽  
Joon Soo Park ◽  
Sang Pill Lee ◽  
Yi Hyun Park ◽  
Yu Sik Kong ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hybrid Composites ◽  
Strain Curve ◽  
Strength Analysis ◽  
Analytical Prediction ◽  
Stress Strain Curve ◽  
Yield Strain ◽  
Notched Strength ◽  
Element Method

As for the properties on both the aluminum and the CFRP which are used to make CFRP/AL7075 hybrid composites, CARALL (carbon reinforced aluminum laminate). In the CARALL specimen for rule of mixture, we were analyzed notched strength by finite element method. The results obtained from FEM notched strength analysis and experimental are as follows; In the unnotch CARALL specimen, the stresses imposed CFRP, epoxy, A17075 obtained by finite element method strength solution for A/C9991, when strain 0.48%, are 392 Mpa, 26 Mpa and 321 Mpa, respectively. The slope of the stress-strain curve by FEM increase in keeping with the hole size and the yield strain decrease to 36% and 55% for A/C9993 and A/C9991 respectively. And an agreement is found between the experimental results and the FEM analytical prediction results.

An elliptical pore model for the mechanical properties of paper

TAPPI Journal ◽  
2015 ◽  
Vol 14 (8) ◽  
pp. 507-514 ◽  
Author(s):  
GERARD J.F. RING ◽  
MATTI KURKI ◽  
TOMI NIEMINEN
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Strain Curve ◽  
Stress Strain ◽  
Fiber Properties ◽  
Initial Modulus ◽  
Method Model ◽  
Method Analysis ◽  
Element Method

A simple mechanical model for paper comprising only isotropic cell-wall cellulose and a single elliptical pore is presented. Finite element method analysis applied to this model produced two stress-strain curves equivalent to the anisotropy observed in machine-made paper. Nissan’s hydrogen-bond domination theory for cellwall material with a density of 1000 kg/m3 provided the stress-strain functionality to control the displacement of the mesh nodes. Experimental data were collected from a single roll of paper produced on a pilot machine run where formation was decreased in five steps. Fiber properties, sheet grammage, and density were held constant in the final paper. Regardless of the level of formation, all breaking stress and strain data fell into one of two stress-strain curves, a machine-direction curve and a cross-direction curve. The initial modulus of each stress-strain curve was used to estimate the shape of the elliptical pore used in the finite element method model. The results for the model matched the results from the experimental data.

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