Strain Assessment in Cracked Sheet Metals by Optical Grid Method

2014 ◽  
pp. 39-46 ◽  
Author(s):  
M. Sasso ◽  
G. Chiappini ◽  
M. Rossi ◽  
D. Amodio
Keyword(s):  
Grid Method ◽  
Sheet Metals ◽  
Optical Grid

A New Direct Strain Measurement Using Optical Grid Method

2014 ◽  
Author(s):  
Bing Zhao ◽  
GuoBiao Yang
Keyword(s):  
Strain Measurement ◽  
Grid Method ◽  
Matrix Decomposition ◽  
Matrix Inversion ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Rotation Effect ◽  
Displacement Fields ◽  
Optical Grid ◽  
Strain Determination

Normally the strain field is indirectly determined by differentiating the displacement fields. This indirect method always suffers from noise, and the shear strain accuracy is poor due to the rigid body rotation effect. In this paper, a direct strain measurement method based on affine transform matrix decomposition is introduced. A new method for strain matrix inversion without determining the rotation is proposed. This can be used for both local and global 2D/3D strain determination. A uniaxial tensile test with grid measurement technique is carried out to validate this method.

scholarly journals Optical grid Method for Contouring of 1-D Non-Reflective Surfaces

2018 ◽  
Vol 377 ◽  
pp. 012022 ◽  
Author(s):  
M Raghuraman ◽  
V Mahesh Chakravarthi ◽  
Vinod Mummina
Keyword(s):  
Grid Method ◽  
Optical Grid ◽  
Reflective Surfaces

Anisotropy in thin Canning sheet metals

2003 ◽  
Vol 105 ◽  
pp. 19-29 ◽  
Author(s):  
D. W.A. Rees
Keyword(s):  
Sheet Metals

Laser assisted forming of sheet metals

2001 ◽  
Author(s):  
Dieter Schuöcker ◽  
Friedrich Kilian ◽  
Christian Zeinar ◽  
Alexander Kratky
Keyword(s):  
Sheet Metals

Formability Characteristics of Different Sheet Metals By Erichsen Cupping Testing With NDT Methods

2013 ◽  
Vol 1 (1) ◽  
pp. 15-20
Author(s):  
Animesh Talapatra ◽  
◽  
Vinit Ranjan Choudhary ◽  
Kapish Malhotra ◽  
Mukul Vyas ◽  
...  
Keyword(s):  
Sheet Metals

Stability of structured sheet metals during buckling

2019 ◽  
Vol 61 (10) ◽  
pp. 929-935
Author(s):  
Evgenia Ermilova ◽  
Fedor Kazak ◽  
Sabine Weiß
Keyword(s):  
Sheet Metals

Anisotropy in Thin, Canning Sheet Metals

2002 ◽  
Vol 5 (2-3-4) ◽  
pp. 433-443
Author(s):  
David WA Rees ◽  
Mohamed Djouadi
Keyword(s):  
Sheet Metals

Grid Method for Accuracy Study of Micro Parts Manufacturing

2011 ◽  
Vol 3 (3) ◽  
pp. 263-269 ◽  
Author(s):  
E. Minev ◽  
K. Popov ◽  
R. Minev ◽  
S. Dimov ◽  
V. Gagov
Keyword(s):  
Grid Method ◽  
Micro Parts ◽  
Accuracy Study ◽  
Parts Manufacturing

Numerical Solution of a Nonlinear Diffusion Model for Soybean Hydration with Moving Boundary

2015 ◽  
Vol 11 (5) ◽  
pp. 587-595 ◽  
Author(s):  
Douglas J. Nicolin ◽  
Gisleine E. C. da Silva ◽  
Regina Maria M. Jorge ◽  
Luiz Mario M. Jorge
Keyword(s):  
Differential Equation ◽  
Diffusion Model ◽  
Nonlinear Diffusion ◽  
Numerical Scheme ◽  
Moving Boundary ◽  
Grid Method ◽  
Variable Diffusivity ◽  
Variable Space ◽  
Diffusive Fluxes ◽  
Moisture Profiles

Abstract Variable diffusivity and volume of the grains are taken into account in the diffusion model that describes mass transfer in soybean hydration. The variable space grid method (VSGM) was used to consider the increase in grain size, and the diffusivity was considered an exponential function of the moisture content. An equation for the behavior of the grain radius as a function of time was obtained by global mass balance over the soybean grain and the differential equation considered that the increase in radius happens due to the influence of the convective and diffusive fluxes at the surface of the grains. The model was solved by an explicit numerical scheme which presented satisfactory results. The results showed the behavior of moisture profiles obtained as a function of time and radial position and also showed how the grain radius increased with time and changed the solution domain of the diffusion equation.

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