English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper introduces a heuristic topology optimization framework forthin-walled, 2D extruded lattice structures subject to complex high-speedloading. The proposed framework optimizes the wall thickness distribution inthe lattice cross section through different thickness update schemes, inspiredby the idea of equalization of absorbed energy density across all latticewalls. The proposed framework is ubiquitous and can be used in explicit dynamicsimulations, which is the primary numerical method used in crashworthinessstudies. No information on the material tangent stiffness matrix is required,and complex material behaviors and complex loading conditions can be handled.Three numerical examples are presented to demonstrate framework capabilities:(1) Optimization of a long, slender column under axial compression to maximizespecific energy absorption, (2) Optimization of a lattice-filled sandwich panelunder off-center blast loading to minimize material damage, (3) Generation of aperiodic lattice core design under blast loading. The results show that theframework can effectively increase specific energy absorption or minimizematerial damage with as few as 25 finite element simulations and optimizationiterations.

LatticeOPT: A heuristic topology optimization framework for thin-walled, 2D extruded lattices