Computational Mechanical Modelling of Wood—From Microstructural Characteristics Over Wood-Based Products to Advanced Timber Structures

Füssl, Josef; Lukacevic, Markus; Pillwein, Stefan; Pottmann, Helmut

doi:10.1007/978-3-030-03676-8_25

Cited by 3 publications

(2 citation statements)

References 57 publications

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“…Timber is renewable, recyclable, energy-efficient and acts like a carbon sink [58]. Where current timber practice is informed by high-end simulations of material behaviour [59,60] and advanced robotic fabrication [61], these are predicated on highly wasteful systems of standardisation. Timber is characterised by its inherent heterogeneous material structure leading to anisotropic and visco-elastic behaviours.…”

Section: Entering a Bio Based Materials Paradigmmentioning

confidence: 99%

Towards a transformational eco-metabolistic bio-based design framework in architecture

Thomsen

Tamke

2022

Bioinspir. Biomim.

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This paper discusses the foundations of a bio-based material paradigm for architecture. It argues that moving from a current reliance on the non-renewable materials of the geosphere, to the renewable and fundamentally cyclical materials of the biosphere can establish alternate foundations for thinking alternative sustainable building practices. By positioning architecture and the built environment as a particular case for bio-based materials, where the longer life spans of buildings support better carbon storage, this paper identifies the bottlenecks that limit their adaptation into the way architecture is thought, designed and built. If architectural ideation and design is traditionally understood through the durable and the permanent, our aim here is to challenge this foundation and bring forth the fundamental differences that bio-based materials engender. With focus on the embedded lifespans of living materials, the fundamental circularity and degradability of biomass and resulting transformative life cycles of the artefacts that they embody, this paper asks how a new representational framework for bio-based material paradigm can be conceptualised, instrumentalised and in turn materialised. The paper supports this positioning through a presentation of a series of methodological probes. The probes outline strategies for new methodologies by which we can capture, predict and steer the transformations of living materials and funcationalise them as part of an architectural performance.

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Section: Entering a Bio Based Materials Paradigmmentioning

confidence: 99%

Towards a transformational eco-metabolistic bio-based design framework in architecture

Thomsen

Tamke

2022

Bioinspir. Biomim.

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“…Various sources deal with the material modelling of microstructural related mechanics on lower length scales, summarized in reference [8]. In reference [9], a hierarchical model considering elastic stiffness of softwood is introduced.…”

Section: Introductionmentioning

confidence: 99%

Modelling Inhomogeneity of Veneer Laminates with a Finite Element Mapping Method Based on Arbitrary Grayscale Images

Zerbst

Liebold²,

Gereke

et al. 2020

Materials

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Failure and deformation behavior of veneer laminates of ring porous wood species vary with the individual arrangement of early- and latewood zones over a veneer sheet. Therefore, a method is presented, where local failure and damage modes are considered for finite element models with respect to forming simulations, during the development process of automotive interior trim parts. Within the mapping tool Envyo, a routine has been realized for the discretization of early- and latewood zones from ash wood veneer surfaces to finite element meshes. The routine performs the following steps: reading a grayscale image of known size and generation of a point cloud based on the number of pixels; transformation and scaling of the generated point cloud to align with a target finite element mesh; nearest neighbor search and transfer of grayscale values to the target mesh element centroids; assigning part and therefore material properties to the target elements based on the mapped grayscale value and user-defined grayscale ranges. Due to the absence of measurement data for early- and latewood, optimization was used to identify locally varying material constants. A set of material input parameters for early- and latewood was created, calibrating the force-displacement response of tensile test simulations to corresponding experimental curves. The numerical results gave a very good agreement to the failure behavior of tensile tests in the loading directions longitudinal and transverse to the fiber orientation. Furthermore, in a stochastic analysis the characteristic distribution of tensile strength and ultimate strain could be verified for the suggested procedure. The introduced modelling approach can be applied for the discrete implementation of inhomogeneity to numerical simulations.

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A robust multisurface return-mapping algorithm and its implementation in Abaqus

Pech

Lukacevic

Füssl

2021

Finite Elements in Analysis and Design

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Computational Mechanical Modelling of Wood—From Microstructural Characteristics Over Wood-Based Products to Advanced Timber Structures

Cited by 3 publications

References 57 publications

Towards a transformational eco-metabolistic bio-based design framework in architecture

Towards a transformational eco-metabolistic bio-based design framework in architecture

Modelling Inhomogeneity of Veneer Laminates with a Finite Element Mapping Method Based on Arbitrary Grayscale Images

A robust multisurface return-mapping algorithm and its implementation in Abaqus

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