The Experts below are selected from a list of 1575 Experts worldwide ranked by ideXlab platform

Akihiro Matsuda - One of the best experts on this subject based on the ideXlab platform.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

Akitaka Nomoto - One of the best experts on this subject based on the ideXlab platform.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

Hiroki Yasutaka - One of the best experts on this subject based on the ideXlab platform.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

Sho Oketani - One of the best experts on this subject based on the ideXlab platform.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

  • 2-Dimensional Homogenization FEM Analysis of Hyperelastic Foamed Rubber
    Procedia Engineering, 2016
    Co-Authors: Akitaka Nomoto, Hiroki Yasutaka, Sho Oketani, Akihiro Matsuda
    Abstract:

    Abstract Foamed Rubbers are widely used for the shoe-soles, shin-guards, protectors and so on. The complex microstructure of Foamed Rubber consists of Rubber matrix and pores. Therefore, Foamed Rubbers show good shock-absorbing properties in addition to good formability and lightweight. The mechanical characteristics of Foamed Rubber are determined by the mechanical characteristics of Rubber matrix and its microstructure. In this study, a homogenization numerical analysis of mechanical characteristics of Foamed Rubber considering the Rubber matrix and microstructure was shown. In order to develop the evaluation method, the microstructure of the Foamed Rubber was assumed to have the periodical holes, and a homogenization FEM code for formed Rubber was developed based on homogenization theory with hyperelasticity. To verify the applicability of our developed code, rectangular Rubber specimens with periodically holes were prepared to observe stress distributions of periodical inner structure. Incompressible hyperelasticity was applied to the Rubber matrix. The material parameters of hyperelasticity for Rubber matrix were identified by the biaxial tensile test results. Compression test of the Rubber specimen reproducing FEM model was conducted to verify the applicability of the analysis code. The analysis result showed good agreement with the compression test result in the low strain region.

Mattsson Jakob - One of the best experts on this subject based on the ideXlab platform.

  • Thermal and Mechanical Analysis of a Sustainable Alternative to Neoprene Wetsuits
    Lunds universitet Industriell Produktion, 2019
    Co-Authors: Holmström Eric, Mattsson Jakob
    Abstract:

    A novel material composition has been investigated in terms of thermal, mechanical, economical and sustainable aspects to be compared to neoprene wetsuits. It is believed that a sandwich structure produced by a dipping method with Rubber layers containing an insulating textile can insulate better than Foamed neoprene. The hypothesis is also that this sandwich structure can increase durability and have similar elastic behaviour as neoprene. The effect of using Forest Stewardship Council (FSC)-certified Rubber and recycled fabric has also been investigated from a sustainable point of view. To further test if this material can compete with neoprene, an economical analysis have been carried out. It was found using simulations and thermal conductivity measurements that the new material insulates approximately 35% better than a high end wetsuit material on the market which was expected due to the absence of Rubber in the middle layer. In terms of elasticity, the new material has slightly higher elastic modulus than the neoprene suit, which is probably due to the use of solid instead of Foamed Rubber. Using a low modulus latex might change these results. Regarding sustainability many aspects are similar for both the new material investigated and neoprene such as transportation and disposition of the product. There is one large environmental gain for the novel material in using natural Rubber with a FSC-certification and recycled cotton. The relatively limited cost analysis shows that the neoprene suit is slightly cheaper to produce. The dipping method used to produce the samples in this report is believed to be easier to automate, but there are certain complex problems when scaling up production to full wetsuits that need to be addressed.Oil-based neoprene is used today to create wetsuits that last only for a couple of seasons. A moulded sandwich structure has been found to be competitive as a sustainable replacement