The Experts below are selected from a list of 4062 Experts worldwide ranked by ideXlab platform

Pierre Duysinx - One of the best experts on this subject based on the ideXlab platform.

  • Imposing Minimum and maximum member size, Minimum cavity size, and Minimum Separation Distance between solid members in topology optimization
    Computer Methods in Applied Mechanics and Engineering, 2020
    Co-Authors: Eduardo Fernández, Yang Kaike, Stijn Koppen, Pablo Alarcón, Simon Bauduin, Pierre Duysinx
    Abstract:

    Abstract This paper focuses on density-based topology optimization and proposes a combined method to simultaneously impose Minimum length scale in the Solid phase (MinSolid), Minimum length scale in the Void phase (MinVoid) and Maximum length scale in the Solid phase (MaxSolid). MinSolid and MinVoid mean that the size of solid parts and cavities must be greater than the size of a prescribed circle or sphere. This is ensured through the robust design approach based on eroded, intermediate and dilated designs. MaxSolid seeks to restrict the formation of solid parts larger than a prescribed size, which is imposed through local volume restrictions. In the first part of this article, we show that by proportionally restricting the maximum size of the eroded, intermediate and dilated designs, it is possible to obtain optimized designs satisfying, simultaneously, MinSolid, MinVoid and MaxSolid. However, in spite of obtaining designs with crisp boundaries, some results can be difficult to manufacture due to the presence of multiple rounded cavities, which are introduced by the maximum size restriction with the sole purpose of avoiding thick solid members in the structure. To address this issue, in the second part of this article we propose a new geometric constraint that seeks to control the Minimum Separation Distance between two solid members, also called the Minimum Gap (MinGap). Differently from MinVoid, MinGap introduces large void areas that do not necessarily have to be round. 2D and 3D test cases show that simultaneous control of MinSolid, MinVoid, MaxSolid and MinGap can be useful to improve the manufacturability of maximum size constrained designs.

J. Kirschner - One of the best experts on this subject based on the ideXlab platform.

  • Strain relief guided novel growth of atomic nanowires in a Cu3N-Cu(110) molecular network
    Physical Review Letters, 2009
    Co-Authors: D. I. Bazhanov, Olivier Fruchart, F. Yildiz, T. Yokoyama, M. Przybylski, V. S. Stepanyuk, W. Hergert, J. Kirschner
    Abstract:

    A self-corrugated Cu3N-Cu(110) molecular network shows potential to overcome the element dependence barrier as demonstrated by epitaxial growth of atomic nanowires (1 nm in width) among various 3d, 4d, and 5d elements. Scanning tunnelling microscopy (STM) shows that all of the investigated atomic nanowires share an identical structure, featuring uniform width, height, orientation and same Minimum Separation Distance. Ab initio study reveals that the formation mechanism of atomic nanowires can be directly attributed to a strain relief guided asymmetric occupation of atoms on the originally symmetric crest zone of the corrugated network.

  • Strain relief guided growth of atomic nanowires in a Cu3N-Cu(110) molecular network.
    Physical review letters, 2009
    Co-Authors: D. I. Bazhanov, Olivier Fruchart, F. Yildiz, T. Yokoyama, M. Przybylski, V. S. Stepanyuk, W. Hergert, J. Kirschner
    Abstract:

    A self-corrugated Cu(3)N-Cu(110) molecular network shows the potential to overcome the element dependence barrier as demonstrated by epitaxial growth of atomic nanowires (approximately 1 nm in width) among various 3d, 4d, and 5d elements. Scanning tunneling microscopy shows that all of the investigated atomic nanowires share an identical structure, featuring uniform width, height, orientation and the same Minimum Separation Distance. Ab initio study reveals that the formation mechanism of atomic nanowires can be directly attributed to a strain relief guided asymmetric occupation of atoms on the originally symmetric crest zone of the corrugated network.

Eduardo Fernández - One of the best experts on this subject based on the ideXlab platform.

  • Imposing Minimum and maximum member size, Minimum cavity size, and Minimum Separation Distance between solid members in topology optimization
    Computer Methods in Applied Mechanics and Engineering, 2020
    Co-Authors: Eduardo Fernández, Yang Kaike, Stijn Koppen, Pablo Alarcón, Simon Bauduin, Pierre Duysinx
    Abstract:

    Abstract This paper focuses on density-based topology optimization and proposes a combined method to simultaneously impose Minimum length scale in the Solid phase (MinSolid), Minimum length scale in the Void phase (MinVoid) and Maximum length scale in the Solid phase (MaxSolid). MinSolid and MinVoid mean that the size of solid parts and cavities must be greater than the size of a prescribed circle or sphere. This is ensured through the robust design approach based on eroded, intermediate and dilated designs. MaxSolid seeks to restrict the formation of solid parts larger than a prescribed size, which is imposed through local volume restrictions. In the first part of this article, we show that by proportionally restricting the maximum size of the eroded, intermediate and dilated designs, it is possible to obtain optimized designs satisfying, simultaneously, MinSolid, MinVoid and MaxSolid. However, in spite of obtaining designs with crisp boundaries, some results can be difficult to manufacture due to the presence of multiple rounded cavities, which are introduced by the maximum size restriction with the sole purpose of avoiding thick solid members in the structure. To address this issue, in the second part of this article we propose a new geometric constraint that seeks to control the Minimum Separation Distance between two solid members, also called the Minimum Gap (MinGap). Differently from MinVoid, MinGap introduces large void areas that do not necessarily have to be round. 2D and 3D test cases show that simultaneous control of MinSolid, MinVoid, MaxSolid and MinGap can be useful to improve the manufacturability of maximum size constrained designs.

D. I. Bazhanov - One of the best experts on this subject based on the ideXlab platform.

  • Strain relief guided novel growth of atomic nanowires in a Cu3N-Cu(110) molecular network
    Physical Review Letters, 2009
    Co-Authors: D. I. Bazhanov, Olivier Fruchart, F. Yildiz, T. Yokoyama, M. Przybylski, V. S. Stepanyuk, W. Hergert, J. Kirschner
    Abstract:

    A self-corrugated Cu3N-Cu(110) molecular network shows potential to overcome the element dependence barrier as demonstrated by epitaxial growth of atomic nanowires (1 nm in width) among various 3d, 4d, and 5d elements. Scanning tunnelling microscopy (STM) shows that all of the investigated atomic nanowires share an identical structure, featuring uniform width, height, orientation and same Minimum Separation Distance. Ab initio study reveals that the formation mechanism of atomic nanowires can be directly attributed to a strain relief guided asymmetric occupation of atoms on the originally symmetric crest zone of the corrugated network.

  • Strain relief guided growth of atomic nanowires in a Cu3N-Cu(110) molecular network.
    Physical review letters, 2009
    Co-Authors: D. I. Bazhanov, Olivier Fruchart, F. Yildiz, T. Yokoyama, M. Przybylski, V. S. Stepanyuk, W. Hergert, J. Kirschner
    Abstract:

    A self-corrugated Cu(3)N-Cu(110) molecular network shows the potential to overcome the element dependence barrier as demonstrated by epitaxial growth of atomic nanowires (approximately 1 nm in width) among various 3d, 4d, and 5d elements. Scanning tunneling microscopy shows that all of the investigated atomic nanowires share an identical structure, featuring uniform width, height, orientation and the same Minimum Separation Distance. Ab initio study reveals that the formation mechanism of atomic nanowires can be directly attributed to a strain relief guided asymmetric occupation of atoms on the originally symmetric crest zone of the corrugated network.

Simon Bauduin - One of the best experts on this subject based on the ideXlab platform.

  • Imposing Minimum and maximum member size, Minimum cavity size, and Minimum Separation Distance between solid members in topology optimization
    Computer Methods in Applied Mechanics and Engineering, 2020
    Co-Authors: Eduardo Fernández, Yang Kaike, Stijn Koppen, Pablo Alarcón, Simon Bauduin, Pierre Duysinx
    Abstract:

    Abstract This paper focuses on density-based topology optimization and proposes a combined method to simultaneously impose Minimum length scale in the Solid phase (MinSolid), Minimum length scale in the Void phase (MinVoid) and Maximum length scale in the Solid phase (MaxSolid). MinSolid and MinVoid mean that the size of solid parts and cavities must be greater than the size of a prescribed circle or sphere. This is ensured through the robust design approach based on eroded, intermediate and dilated designs. MaxSolid seeks to restrict the formation of solid parts larger than a prescribed size, which is imposed through local volume restrictions. In the first part of this article, we show that by proportionally restricting the maximum size of the eroded, intermediate and dilated designs, it is possible to obtain optimized designs satisfying, simultaneously, MinSolid, MinVoid and MaxSolid. However, in spite of obtaining designs with crisp boundaries, some results can be difficult to manufacture due to the presence of multiple rounded cavities, which are introduced by the maximum size restriction with the sole purpose of avoiding thick solid members in the structure. To address this issue, in the second part of this article we propose a new geometric constraint that seeks to control the Minimum Separation Distance between two solid members, also called the Minimum Gap (MinGap). Differently from MinVoid, MinGap introduces large void areas that do not necessarily have to be round. 2D and 3D test cases show that simultaneous control of MinSolid, MinVoid, MaxSolid and MinGap can be useful to improve the manufacturability of maximum size constrained designs.