Computer Aided Design

Journal: Computer Aided Design

Abbreviation

Comput. Aided Des.

Publisher

Elsevier

ISSN

0010-4485
1879-2685

Show all metadata

Search Results

Publications 1 - 10 of 19

ArchiDNA: An interactive system for creating 2D and 3D conceptual drawings in architectural design
Kwon, Doo Y.; Gross, Mark D.; Do, Ellen Y.-L. (2009)
Computer Aided Design
Fabrication-aware strip-decomposable quadrilateral meshes
Mitropoulou, Ioanna; Vaxman, Amir; Diamanti, Olga; et al. (2024)
Computer Aided Design
Strip-decomposable quadrilateral (SDQ) meshes, i.e., quad meshes that can be decomposed into two transversal strip networks, are vital in numerous fabrication processes; examples include woven structures, surfaces from sheets, custom rebar, or cable-net structures. However, their design is often challenging and includes tedious manual work, and there is a lack of methodologies for editing such meshes while preserving their strip decomposability. We present an interactive methodology to generate and edit SDQ meshes aligned to user-defined directions, while also incorporating desirable properties to the strips for fabrication. Our technique is based on the computation of two coupled transversal tangent direction fields, integrated into two overlapping networks of strips on the surface. As a case study, we consider the fabrication scenario of robotic non-planar 3D printing of free-form surfaces and apply the presented methodology to design and fabricate non-planar print paths.
Disjointed force polyhedra
Lee, Juney; Van Mele, Tom; Block, Philippe (2018)
Computer Aided Design
A Computer-Aided Approach to Equilibrium Design Based on Graphic Statics and Combinatorial Variations
Ohlbrock, Patrick Ole; D'Acunto, Pierluigi (2020)
Computer Aided Design
Material ecology
Oxman, Neri; Ortiz, Christine; Gramazio, Fabio; et al. (2015)
Computer Aided Design
Two-Colour Topology Finding of Quad-Mesh Patterns
Oval, Robin; Mesnil, Romain; Van Mele, Tom; et al. (2021)
Computer Aided Design
The patterns of many structural systems must fulfil a property of two-colourability to partition their elements into two groups. Such examples include top versus bottom layers of continuous beams in elastic gridshells, corrugated versus non-corrugated directions in corrugated shells or warp versus weft threads in woven structures. Complying with such constraints does not depend on the geometry but on the topology of the structure, and, more specifically, on its singularities. This paper presents a search strategy to obtain patterns that fulfil this topological requirement, which represent only a fraction of the general design space. Based on an algebra for the exploration of the topology of quad meshes, including a grammar and a distance, a topology-finding algorithm is proposed to find the closest two-colour quad-mesh patterns from an input quad-mesh pattern. This approach is expressed as the projection to the two-colourable subspace of the design space. The distance underlying the definition of the projection measures the similarity between designs as the minimum number of topological grammar rules to apply to modify one design into another. A design application illustrates how two-colour topology finding can complement workflows for the exploration of structural patterns with singularities informed by the system's topological requirements.
Computational design and fabrication of reusable multi-tangent bar structures
Huang, Yijiang; Wang, Ziqi; Hung, Yi-Hsiu; et al. (2025)
Computer Aided Design
Temporary bar structures made of reusable standardized components are widely used in construction, events, and exhibitions. They are economical, easy to assemble, and can be disassembled and reused in various structural arrangements for various purposes. However, existing reusable temporary structures are either limited to modular yet repetitive designs or require bespoke components, which restricts their reuse potential. Instead of designing bespoke kit of parts for limited reuse, this paper investigates how to design and build diverse freeform structures from one homogeneous kit of parts. We propose a computational framework to generate multi-tangent bar structures, a widely used jointing system, which allows bars to be joined at any point along their length with standard connectors. We present a mathematical formulation and a numerical scheme to optimize the bar spatial positions and contact assignment simultaneously, while ensuring that the constraints of tangency, collision, joint connectivity, and bar length are satisfied. Together with simulated case studies, we present two physical prototypes that reuse the same kit of parts using an augmented reality-guided assembly workflow.
Conceptual design and modification of freeform surfaces using dual shape representations in augmented reality environments
Fuge, Mark; Yumer, Mehmet Ersin; Orbay, Gunay; et al. (2012)
Computer Aided Design
This paper enables the rapid creation and modification of freeform surfaces inside an augmented reality environment, and focuses on methods for enabling increased flexibility during exploratory, conceptual industrial product design through three-dimensional (3D) sketch-based user input. Specifically, we address the role of multiple shape representations with varying uncertainty levels during 3D conceptual sketching, along with methods to transform between those representations. The main contributions of this work are: (1) the formulation of virtual shape data in multiple, concurrent representations (points and surfaces), and a regression method to transition fluidly back and forth between these representations during design, (2) methods for deforming and exploring the product shape using these multiple representations, and (3) representations of these forms such that designers can explore conceptual designs without the need for detailed surface operations such as trimming or continuity enforcement. Through incorporating these contributions, we introduce techniques that can be incorporated in future computer-aided conceptual design systems. These contributions are demonstrated for freeform surface design, with examples of computer mouse and car seat exterior surfaces.
Coupled Rigid-Block Analysis: Stability-Aware Design of Complex Discrete-Element Assemblies
Kao, Gene Ting-Chun; Iannuzzo, Antonino; Thomaszewski, Bernhard; et al. (2022)
Computer Aided Design
The rigid-block equilibrium (RBE) method uses a penalty formulation to measure structural infeasibility or to guide the design of stable discrete-element assemblies from unstable geometry. However, RBE is a purely force-based formulation, and it incorrectly describes stability when complex interface geometries are involved. To overcome this issue, this paper introduces the coupled rigid-block analysis (CRA) method, a more robust approach building upon RBE's strengths. The CRA method combines equilibrium and kinematics in a penalty formulation in a nonlinear programming problem. An extensive benchmark campaign is used to show how CRA enables accurate modelling of complex three-dimensional discrete-element assemblies formed by rigid blocks. In addition, an interactive stability-aware design process to guide user design towards structurally-sound assemblies is proposed. Finally, the potential of our method for real-world problems are demonstrated by designing complex and scaffolding-free physical models.
On the equilibrium of funicular polyhedral frames and convex polyhedral force diagrams
Akbarzadeh, Masoud; Van Mele, Tom; Block, Philippe (2015)
Computer Aided Design

Publications 1 - 10 of 19

Journal: Computer Aided Design

Abbreviation

Publisher

Journal Volumes

ISSN

Description

Filters

Search Results