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论文类型：期刊论文

发表时间：2020-07-01

发表刊物：COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING

收录刊物：SCIE

卷号：366

ISSN号：0045-7825

关键字：Infill lattice structures; Graded microstructures; Topology optimisation; Asymptotic analysis; Topology description function

摘要：We here introduce a novel scheme for generating smoothly-varying infill graded microstructural (IGM) configurations from a given menu of generating cells. The scheme was originally proposed for essentially improving the variety of describable configurations in a modified asymptotic homogenisation-based topology optimisation framework (Zhu et al., 2019) for fast IGM design. But the proposed scheme, after modification, also demonstrates its values in two aspects of applications. First, it provides a fairly simple way of generating an IGM configuration continuously patching any given cell configurations. Second, it tenders a straightforward means for generating microstructures on a given manifold. We will further show that the form of topology description function given here effectively offers a platform for unifying most existing approaches for IGM generation. Fuelled by asymptotic analysis of the mechanical behaviour of the resulting IGM configurations, a topology optimisation scheme for their compliance minimisation is thus presented, whose effectiveness is further shown with numerical examples. (C) 2020 Elsevier B.V. All rights reserved.