Numerical Assessment Of Plastic Yielding In Extrusion-Based

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Tao, Yaxin / Zhou, Jiangang / Cui, Weijiu / Shi, Xinyu / De Schutter, Geert (2024): Numerical assessment of plastic yielding in extrusion-based 3D concrete printing.

The study presents an experimental and numerical assessment of the Prestressed Lead Extrusion Damper (P-LED), an emerging energy dissipation device which provides energy dissipation through the Numerical modelling and simulation for extrusion-based 3D concrete printing: The underlying physics, potential, and challenges 3D Concrete Printing (3DCP) is a rapidly evolving technology that allows for the efficient and accurate construction of complex concrete objects. In this paper, a numerical modelling approach is presented for the simulation of the printing process of cementitious materials, based on the homogeneous fluid assumption. To cope with the large deformations of

Bibliographie de Xinyu Shi

Numerical assessment of plastic yielding in extrusion-based 3D concrete printing Yaxin Tao (UGent) , Jiangang Zhou, Weijiu Cui, Xinyu Shi, Geert De Schutter (UGent) and Kim Van Tittelboom (UGent)

A comprehensive investigation on the correlation between die design and process parameters with extrusion welds (seam and charge) prediction and die deformation after multiple-cycles is presented. In particular, the influence of the number of legs (2,3 and 4) as well of some commonly adopted industrial best design practices in the extrusion of a round tube profile are

Therefore, this work aims to present and describe innovative 3D numerical models for the extrusion process implemented within COMSOL Multiphysics® that combine different modules. Several industrial case studies were discussed to show and handle some challenges for the advanced optimization of the process through numerical simulation. Two mechanisms have been recognized as causes of structure collapse in extrusion-based, layered 3D-concrete-printing during manufacturing: Material failure (plastic failure) and loss of structural A buckling-restrained brace (BRB), which is a type of metallic yielding-based device, can yield under both tension and compression without buckling and exhibits a stable elastic–plastic hysteretic behaviour.

Plastic yielding may occur during the 3D printing process, which refers to the non-reversible deformation of the extruded material under load. It is essential to understand and model the plastic yielding of 3D printable concrete in numerical simulations to ensure the high shape stability of 3D-printed elements.

Based on construction engineering practice and numerical simulations, characteristics of extrusion damage of deeply buried tunnels with soft and weak rock masses were analyzed. Countermeasures were implemented to solve the problems of large deformations, which can be used as references for the construction of similar soft rock Finally, layer Construction of pressure sensitivity of the yield stress is added to the analysis. Numerical Assessments of Cracks in Elastic-Plastic Materials is a research monograph focused on asymptotic expansions of elastic-plastic crack and notch tip fields. It is suitable as a reference source for parts of a second graduate-level course in fracture

Numerical Modeling of an Extrusion-Based 3D Concrete

Numerical assessment of plastic yielding in extrusion-based 3D concrete printing Article Feb 2024 MATER STRUCT Yaxin Tao Jiangang Zhou Weijiu Cui Kim Van Tittelboom

Abstract. Extrusion-based concrete 3D printing is an emerging construction technique to build the desired structure layer by layer without using any type of formwork. Hence, the printable concrete requires to achieve adequate strength to support the self-weight and subsequent layers in short period of time. This paper aims to identify the strength-based failure limits of 3D printing

Since the distribution of extrusion forces may change substantially under the nozzle for varying parameters, a novel indicator based on the yielding material is introduced to find optimal 3D-printing parameters to prevent plastic deformations in substrate layers. Different from conventional mold-cast concrete, extrusion-based AM has 3D printable concrete is deposited layer-by-layer without the support of formwork. Plastic yielding may occur during the 3D printing process, which refers to the non-reversible deformation of the extruded material under load. It is essential to understand and model the plastic yielding of 3D printable concrete in

According to Wangler et al. [13] among the different concrete printing processes, the extrusion-based process is the most widely used. Therefore, the presented contribution considers the extrusion-based process which has been demonstrated to be applicable to This paper compiles selected predictive analytical elastic plastic and numerical tools which can be used to model and understand the mechanisms of importance at different stages during and immediately after extrusion-based 3D printing of cementitious materials. The proposed toolbox covers different aspects of the process including mixing, material transportation, layer

Construction of long tunnels in difficult sites is associated with various risks. Such risks are usually resulted on one hand from the lack of geological and geotechnical studies of the surrounding ground, and on the other hand from the inappropriate support system. On January 1, 2014, the left tube of T1 tunnel located in Constantine (Algeria) collapsed during construction.

Numerical assessment of plastic yielding in extrusion-based 3D concrete printing Yaxin Tao,Jiangang Zhou,Weijiu Cui,Xinyu Shi,Geert De Schutter,Kim Van Tittelboom Current Trends in the Technology of Plasticity Table of Contents of Volume 1 Proceedings of the 14th International Conference on the Technology of Plasticity

Tao, Yaxin / Zhou, Jiangang / Cui, Weijiu / Shi, Xinyu / De Schutter, Geert (2024): Numerical assessment of plastic yielding in extrusion-based 3D concrete printing. Tao, Yaxin / Zhou, Jiangang / Cui, Weijiu / Shi, Xinyu / De Schutter, Geert / Van Tittelboom, Kim (2024): Numerical assessment of plastic yielding in extrusion-based 3D concrete printing. Extrusion-based additive manufacturing (AM) has recently become widespread for the layer-by-layer fabrication of three-dimensional prototypes and components even with highly complex shapes. This technology involves extrusion through a nozzle by means of a plunger-, filament- or screw-based mechanism; where necessary, this is preceded by heating of the

Numerical assessment of plastic yielding in extrusion-based 3D concrete printing Yaxin Tao (UGent) , Jiangang Zhou, Weijiu Cui, Xinyu Shi, Geert De Schutter (UGent) and Kim Van Tittelboom (UGent) Extrusion-based additive manufacturing (EB-AM) is a 3D fabrication process concrete printing Article Feb 2024 in which the material is heated and extracted through a nozzle before being deposited one layer at a time. Strategies for numerical simulation of 3D concrete printing : Voxel- based versus Extrusion-based meshing Conference Paper Full-text available Jun 2021

Firstly, we quantify the extrusion-induced excavation volume for a wide parameter range by means of a numerical model that uses re-meshing to consider the continuous re-profiling taking place at

In the second part of this paper, we focus on the existing literature on numerical simulations of extrusion-based additive manufacturing processes for concrete. Specifi-cally, this study utilises alginate-based bioink to evaluate shear stress efects on cell viability during the extrusion process as a generalisable model system for understand-ing and optimising cell survival in extrusion-based bio-printing.

Therefore, this paper aims to characterize the rheological parameters important for extrusion using a ram extrusion method. Also, a numerical simulation tool was developed using the discrete element method to simulate the ram extrusion and the screw-type extrusion.

Herein, different kinds of methods for buildability quantification of 3D concrete printing are reviewed, including experimental approaches, analytical modelling, and numerical simulations. A brief

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