scholarly journals Shape Optimization by Biological Growth Strain Method-Minimization of Stress Concentration.

1998 ◽  
pp. 9-18
Author(s):  
Kai-Lin Hsu ◽  
Taketo Uomoto
Keyword(s):  
Stress Concentration ◽  
Shape Optimization ◽  
Growth Strain ◽  
Biological Growth ◽  
Strain Method

Shape Optimization in Laminated Composite Plates by Growth-Strain Method, Part Two - Stress Control

2004 ◽  
Vol 261-263 ◽  
pp. 839-844 ◽  
Author(s):  
Seok Yoon Han ◽  
J.Y. Park ◽  
Y.J. Ma
Keyword(s):  
Shape Optimization ◽  
Laminated Composite ◽  
Composite Plates ◽  
Volume Control ◽  
Distributed Parameter ◽  
Growth Strain ◽  
Laminated Composite Plates ◽  
Stress Control ◽  
Isotropic Media ◽  
Strain Method

Stress control of the growth-strain method was applied to shape optimization of multiple cutouts in laminated composite plates. Since the growth-strain method optimizes a shape by generating the bulk strain to make the distributed parameter uniform, the distributed parameter was chosen as Tsai-Hill value, as volume control of the growth-strain method. In this study, of particular interest is to see whether stress control of the growth-strain method developed for shape optimization in isotropic media would work for laminated composite plates. The shapes optimized by Tsai-Hill fracture index were compared with those of the initial shapes for the various load conditions. As a result, it was verified that stress control of the growth-strain method also worked very well for multiple cutouts optimization in laminated composite plates.

Shape Optimization of Cutouts in Laminated Composite Plates Using Solid Element

2005 ◽  
Vol 297-300 ◽  
pp. 2740-2745
Author(s):  
Seok Yoon Han ◽  
Y.J. Ma ◽  
J.Y. Park
Keyword(s):  
Shape Optimization ◽  
Three Dimensional ◽  
Laminated Composite ◽  
Composite Plates ◽  
Volume Control ◽  
Growth Strain ◽  
Laminated Composite Plates ◽  
Failure Index ◽  
Solid Element ◽  
Strain Method

Shape optimization was performed to obtain the precise shape of cutouts including the internal shape of cutouts in laminated composite plates by three dimensional modeling using solid element. The volume control of the growth-strain method was implemented and the distributed parameter was chosen as Tsai-Hill failure index for shape optimization. In order to verify the validity of the obtained optimal shapes, the changes of the maximum Tsai-Hill failure index were examined for each load condition and cutouts. The following conclusions were obtained in this study; 1) It was found that growth-strain method was applied efficiently to shape optimization of three dimensional cutouts in anisotropic laminate composite, 2) The optimal three dimensional shapes of the various load conditions and cutouts were obtained, 3) The maximum Tsai-Hill failure index was reduced up to 68% when shape optimization was performed under the initial volume by volume control of growth-strain method.

Shape Optimization in Laminated Composite Plates by Growth-Strain Method, Part One - Volume Control

2004 ◽  
Vol 261-263 ◽  
pp. 833-838 ◽  
Author(s):  
Seok Yoon Han ◽  
S.S. Bae ◽  
S.J. Jung
Keyword(s):  
Shape Optimization ◽  
Laminated Composite ◽  
Composite Plates ◽  
Volume Control ◽  
Distributed Parameter ◽  
Growth Strain ◽  
Laminated Composite Plates ◽  
Bulk Strain ◽  
Isotropic Media ◽  
Strain Method

The growth-strain method was applied to cutout optimization in laminated composite plates. Since the growth-strain method optimizes a shape by generating the bulk strain to make the distributed parameter uniform, the distributed parameter was chosen as Tsai-Hill value. In this study, of particular interest is to see whether the growth-strain method developed for shape optimization in isotropic media would work for laminated composite plates. In volume control of the growth-strain method, it makes Tsai-Hill value at each element uniform in laminated composite plates under the predetermined volume. The shapes optimized by Tsai-Hill fracture index were compared with those of the initial shapes for the various load conditions and predetermined volumes of laminated composite plates. As a result, it was verified that volume control of the growth-strain method worked very well for cutout optimization in laminated composite plates.

scholarly journals Shape Optimization of a Hip Prosthesis Stem Using Growth-Strain Method.

1999 ◽  
Vol 65 (629) ◽  
pp. 180-186 ◽  
Author(s):  
Michio MIYAMOTO ◽  
Yoshihisa MINAKUCHI ◽  
Shouichi HIRANO
Keyword(s):  
Shape Optimization ◽  
Hip Prosthesis ◽  
Growth Strain ◽  
Strain Method
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