scholarly journals Tilted Arch; Implementation of Additive Manufacturing and Bio-Welding of Mycelium-Based Composites

Biomimetics ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 68
Author(s):  
Behzad Modanloo ◽  
Ali Ghazvinian ◽  
Mohammadreza Matini ◽  
Elham Andaroodi

Bio-based materials have found their way to the design and fabrication in the architectural context in recent years. Fungi-based materials, especially mycelium-based composites, are a group of these materials of growing interest among scholars due to their light weight, compostable and regenerative features. However, after about a decade of introducing this material to the architectural community, the proper ways of design and fabrication with this material are still under investigation. In this paper, we tried to integrate the material properties of mycelium-based composites with computational design and digital fabrication methods to offer a promising method of construction. Regarding different characteristics of the material, we found additive manufacturing parallel to bio-welding is an appropriate fabrication method. To show the feasibility of the proposed method, we manufactured a small-scale prototype, a tilted arch, made of extruded biomass bound with bio-welding. The project is described in the paper.

2013 ◽  
Vol 5 (2) ◽  
pp. 194-201
Author(s):  
Michael Hansmeyer ◽  
Benjamin Dillenburger

Computational design allows for architecture with an extraordinary degree of topographical and topological complexity. Limitations of traditional CNC technologies have until recently precluded this architecture from being fabricated. While additive manufacturing has made it possible to materialize these complex forms, this has occurred only at a very small scale. In trying to apply additive manufacturing to the construction of full-scale architecture, one encounters a dilemma: existing large-scale 3D printing methods can only print highly simplified shapes with rough details, while existing high-resolution technologies have limited print spaces, high costs, or material attributes that preclude a structural use. This paper provides a brief background on additive manufacturing technology and presents recent developments in sand-printing technology that overcome current 3D printing restrictions. It then presents a specific experiment, Digital Grotesque project, which is the first application of 3D sand-printing technology at an architecture scale. It describes how this project attempts to exploit the potentials of these new technologies.


2021 ◽  
Author(s):  
Kathryn Turner

<p><b>We are currently in the middle of the 4th industrial revolution, where digital technology and fabrication tools have the potential to drastically change the way we think about architecture. Contemporary architectural design is now being driven by an influx of digital tools, including parametric modelling, digital fabrication, and robotics. These tools allow designers to create forms with complexity, creating new textures, patterns and styles, they are however being under-utilised. Because the focus of these methods remains on mass-production and efficiency, as they were from the second industrial revolution, architecture has now become sleek and un-ornamental. When ornamentation is used it is now generally limited to façade design, and the focus is towards ideas such as tessellation and repetition. These styles can sometimes be successful, however they lack the sense of depth and craft that classical ornamentation once had. A variety of social, cultural, technological and historical influences means that contemporary ornamentation no longer holds the significance and importance it once had. This research questions this reality and explores the use of contemporary computational design and fabrication techniques to understand how ornamentation can be revitalised and reimagined in contemporary architecture. </b></p> <p>By building upon literature and case study analysis, this research uses the architectural column as a design mechanism, and parametric modelling to redefine the place that ornamentation has in contemporary architecture. By using a process of visual scripting and digital modelling, these techniques are used to explore how digital tools and the influence of history can reimagine ornamentation. This research process begins with small-scale digital tests which then translate into small-scale prototypes through the use of additive manufacturing. After an evaluation and critical-reflection of these prototypes, these ideas are translated into clay prototypes by using robotic fabrication. To further refine and finalise the designs the research is then applied to an architectural design context, and a final large-scale column is robotically fabricated. This final stage works to clearly show the design intent, to understand not only how traditional ideas and nature can be translated into contemporary designs, but also how the process of parametric design can create design variation, rather than identically replicated components. This research found that there is an immense amount of potential for using these visual scripting tools and methods of digital fabrication for revitalising ornament, creating mass-customisable architecture, not mass-replications.</p>


2021 ◽  
Author(s):  
Kathryn Turner

<p><b>We are currently in the middle of the 4th industrial revolution, where digital technology and fabrication tools have the potential to drastically change the way we think about architecture. Contemporary architectural design is now being driven by an influx of digital tools, including parametric modelling, digital fabrication, and robotics. These tools allow designers to create forms with complexity, creating new textures, patterns and styles, they are however being under-utilised. Because the focus of these methods remains on mass-production and efficiency, as they were from the second industrial revolution, architecture has now become sleek and un-ornamental. When ornamentation is used it is now generally limited to façade design, and the focus is towards ideas such as tessellation and repetition. These styles can sometimes be successful, however they lack the sense of depth and craft that classical ornamentation once had. A variety of social, cultural, technological and historical influences means that contemporary ornamentation no longer holds the significance and importance it once had. This research questions this reality and explores the use of contemporary computational design and fabrication techniques to understand how ornamentation can be revitalised and reimagined in contemporary architecture. </b></p> <p>By building upon literature and case study analysis, this research uses the architectural column as a design mechanism, and parametric modelling to redefine the place that ornamentation has in contemporary architecture. By using a process of visual scripting and digital modelling, these techniques are used to explore how digital tools and the influence of history can reimagine ornamentation. This research process begins with small-scale digital tests which then translate into small-scale prototypes through the use of additive manufacturing. After an evaluation and critical-reflection of these prototypes, these ideas are translated into clay prototypes by using robotic fabrication. To further refine and finalise the designs the research is then applied to an architectural design context, and a final large-scale column is robotically fabricated. This final stage works to clearly show the design intent, to understand not only how traditional ideas and nature can be translated into contemporary designs, but also how the process of parametric design can create design variation, rather than identically replicated components. This research found that there is an immense amount of potential for using these visual scripting tools and methods of digital fabrication for revitalising ornament, creating mass-customisable architecture, not mass-replications.</p>


2020 ◽  
Vol 11 (1) ◽  
pp. 238
Author(s):  
Yun-Fei Fu ◽  
Kazem Ghabraie ◽  
Bernard Rolfe ◽  
Yanan Wang ◽  
Louis N. S. Chiu

The smooth design of self-supporting topologies has attracted great attention in the design for additive manufacturing (DfAM) field as it cannot only enhance the manufacturability of optimized designs but can obtain light-weight designs that satisfy specific performance requirements. This paper integrates Langelaar’s AM filter into the Smooth-Edged Material Distribution for Optimizing Topology (SEMDOT) algorithm—a new element-based topology optimization method capable of forming smooth boundaries—to obtain print-ready designs without introducing post-processing methods for smoothing boundaries before fabrication and adding extra support structures during fabrication. The effects of different build orientations and critical overhang angles on self-supporting topologies are demonstrated by solving several compliance minimization (stiffness maximization) problems. In addition, a typical compliant mechanism design problem—the force inverter design—is solved to further demonstrate the effectiveness of the combination between SEMDOT and Langelaar’s AM filter.


Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 830
Author(s):  
Sina Rößler ◽  
Andreas Brückner ◽  
Iris Kruppke ◽  
Hans-Peter Wiesmann ◽  
Thomas Hanke ◽  
...  

Today, materials designed for bone regeneration are requested to be degradable and resorbable, bioactive, porous, and osteoconductive, as well as to be an active player in the bone-remodeling process. Multiphasic silica/collagen Xerogels were shown, earlier, to meet these requirements. The aim of the present study was to use these excellent material properties of silica/collagen Xerogels and to process them by additive manufacturing, in this case 3D plotting, to generate implants matching patient specific shapes of fractures or lesions. The concept is to have Xerogel granules as active major components embedded, to a large proportion, in a matrix that binds the granules in the scaffold. By using viscoelastic alginate as matrix, pastes of Xerogel granules were processed via 3D plotting. Moreover, alginate concentration was shown to be the key to a high content of irregularly shaped Xerogel granules embedded in a minimum of matrix phase. Both the alginate matrix and Xerogel granules were also shown to influence viscoelastic behavior of the paste, as well as the dimensionally stability of the scaffolds. In conclusion, 3D plotting of Xerogel granules was successfully established by using viscoelastic properties of alginate as matrix phase.


2021 ◽  
Vol 56 (18) ◽  
pp. 10707-10744
Author(s):  
Jonathan Torres ◽  
Ali P. Gordon

AbstractThe small punch test (SPT) was developed for situations where source material is scarce, costly or otherwise difficult to acquire, and has been used for assessing components with variable, location-dependent material properties. Although lacking standardization, the SPT has been employed to assess material properties and verified using traditional testing. Several methods exist for equating SPT results with traditional stress–strain data. There are, however, areas of weakness, such as fracture and fatigue approaches. This document outlines the history and methodologies of SPT, reviewing the body of contemporary literature and presenting relevant findings and formulations for correlating SPT results with conventional tests. Analysis of literature is extended to evaluating the suitability of the SPT for use with additively manufactured (AM) materials. The suitability of this approach is shown through a parametric study using an approximation of the SPT via FEA, varying material properties as would be seen with varying AM process parameters. Equations describing the relationship between SPT results and conventional testing data are presented. Correlation constants dictating these relationships are determined using an accumulation of data from the literature reviewed here, along with novel experimental data. This includes AM materials to assess the fit of these and provide context for a wider view of the methodology and its interest to materials science and additive manufacturing. A case is made for the continued development of the small punch test, identifying strengths and knowledge gaps, showing need for standardization of this simple yet highly versatile method for expediting studies of material properties and optimization.


Author(s):  
A. V. Vinnichenko ◽  

The paper presents methods and approaches for mathematical modeling and rationalization of flexible additive manufacturing, as well as other processes by which it is possible to create additive models for their integration into the system of experimental or pilot production. The work has also formed and synthesized a process model, which includes flexible production indicators, service indicators, and a developed criterion base for their assessment. The work takes into account the optimization criteria, as well as maximizing and minimizing risks for additive manufacturing, taking into account the possible risk component when deploying new processes for experimental and small-scale production. The models and methods described in the article will make it possible to carry out mathematical modeling and subsequent improvements for the flexible production process using additive technologies, used as a means of achieving the rational use of existing production resources within the framework of existing scientific and production complexes.


2018 ◽  
Vol 35 (4) ◽  
pp. 441-454 ◽  
Author(s):  
M. Shishesaz ◽  
M. Hosseini

ABSTRACTIn this paper, the mechanical behavior of a functionally graded nano-cylinder under a radial pressure is investigated. Strain gradient theory is used to include the small scale effects in this analysis. The variations in material properties along the thickness direction are included based on three different models. Due to slight variations in engineering materials, the Poisson’s ratio is assumed to be constant. The governing equation and its corresponding boundary conditions are obtained using Hamilton’s principle. Due to the complexity of the governed system of differential equations, numerical methods are employed to achieve a solution. The analysis is general and can be reduced to classical elasticity if the material length scale parameters are taken to be zero. The effect of material indexn, variations in material properties and the applied internal and external pressures on the total and high-order stresses, are well examined. For the cases in which the applied external pressure at the inside (or outside) radius is zero, due to small effects in nano-cylinder, some components of the high-order radial stresses do not vanish at the boundaries. Based on the results, the material inhomogeneity indexn, as well as the selected model through which the mechanical properties may vary along the thickness, have significant effects on the radial and circumferential stresses.


2020 ◽  
Author(s):  
Brian Post ◽  
Phillip Chesser ◽  
Alex Roschli ◽  
Lonnie Love ◽  
Katherine Gaul

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