Non-linear fabrication: A dialogue between architecture and robotic wire-arc additive manufacture

<p><b>Within architecture the joint is an integral part of a building’s dialogue withits users and audience. Steel joints allow for the extension of membersand fundamental changes between columns and beams. However, dueto the limitation of traditional metal fabrication, highly parametric andcomputational informed designs are constrained by the conditions ofmass production. High output low cost, limiting the highly variable natureof geometrical informed individual joints.</b></p> <p>Through the fabrication of computational informed architectural steelconnection in combination with non-linear geometric segmentation and6-axis robotic wire arc additive manufacture (WAAM), this researchaims to optimise the aesthetic opportunities and practical fabrication oflarge-scale steel architectural joints. Currently, there exists a disconnectbetween the dialogue of metal joints and architectural intent. Throughthe innovative use of non-linear fabrication and member informed multidirectionalslicing, this research aims to construct a closed digital designloop though to fabrication. Utilising the additive fabrication processof WAAM, to construct a mass-customisable metal node which stillmaintains an aesthetic architectural opportunity.</p> <p>The aims of this research are to outline the potential of fabricating masscustomisablesteel joints through the process of non-linear segmentation.</p> <p>Describing the methods and techniques used to fabricate a computationalinformed metal joint through the manufacturing process of WAAM.</p>

Non-linear fabrication: A dialogue between architecture and robotic wire-arc additive manufacture

<p><b>Within architecture the joint is an integral part of a building’s dialogue withits users and audience. Steel joints allow for the extension of membersand fundamental changes between columns and beams. However, dueto the limitation of traditional metal fabrication, highly parametric andcomputational informed designs are constrained by the conditions ofmass production. High output low cost, limiting the highly variable natureof geometrical informed individual joints.</b></p> <p>Through the fabrication of computational informed architectural steelconnection in combination with non-linear geometric segmentation and6-axis robotic wire arc additive manufacture (WAAM), this researchaims to optimise the aesthetic opportunities and practical fabrication oflarge-scale steel architectural joints. Currently, there exists a disconnectbetween the dialogue of metal joints and architectural intent. Throughthe innovative use of non-linear fabrication and member informed multidirectionalslicing, this research aims to construct a closed digital designloop though to fabrication. Utilising the additive fabrication processof WAAM, to construct a mass-customisable metal node which stillmaintains an aesthetic architectural opportunity.</p> <p>The aims of this research are to outline the potential of fabricating masscustomisablesteel joints through the process of non-linear segmentation.</p> <p>Describing the methods and techniques used to fabricate a computationalinformed metal joint through the manufacturing process of WAAM.</p>

Reinforcing Adhesives Using Carbon Nanotubes for the Carbon Fibre Reinforced Plastic Composite and Metal Joint

The usage of joints between composites and metals has gained significant importance in the recent years and it is the need of the industry that new and improved methods of joining the composites and metals be introduced. In this study, the joint between the carbon fibre reinforced plastic composite and the aluminium metal has been improved with the help of the multi walled carbon nanotubes to reinforce the epoxy adhesive. Knowledge of the interlaminar behaviour regarding the composites is very important as this is the most common type of failure faced by them. Furthermore, the best method for the uniform and fine dispersion of carbon nanotubes in the epoxy is also discussed. In this research, two different types of composite metal joint samples were tested using the mode 1 fracture toughness test to study the interlaminar behaviour of the reinforced epoxy and the double cantilever beam specimen was used to carry out the tests according to the ASTM standards.

MODERN APPROACH TO DIAGNOSIS OF BURSITIS IN THE AREA OF THE METAL JOINT IN CATTLE

Diagnosis and treatment of aseptic and purulent tarsal bursitis in cattle remains an important task for veterinarians. Conventional diagnostic methods did not allow detecting animals with this pathology at early stages, which led to a deterioration in the clinical condition of the animal, loss of productivity and culling.

Experimental Investigation of Damage and Failure Mechanisms of Polymer-Metal Joints assembled by Self-Piercing Riveting

The increased use of polymer-based material in the manufacturing of vehicles structures makes critical the management of multi-material interfaces, and hence the issue of polymer-metal joining. It has been demonstrated in the literature that for large-scale manufacturing, self-piercing riveting (SPR) represents a reliable alternative technique to conventional resistance spot welding (RSW). However, the riveting operation induces, by nature, damages to the joint composite layer due to the steel rivet crossing it. In this study, the damage of the SMC thermoset material during SPR process has been experimentally investigated. Moreover, the influence of the riveting velocity as a major SPR process parameter on the composite layer damage has been identified. Eventually, the failure mechanisms of the polymer-metal joint resulting from failure under lap-shear and pure tension loadings were studied with the support of the numerical simulation tool.

Effects of Brazing Technology on Hermeticity of Alumina Ceramic-Metal Joint Used in Nuclear Power Plants

Taking the brazing mechanism of alumina ceramics and kovar alloys as the main research object, based on the molybdenum–manganese metallization method, the influence of the direct and indirect brazing processes on the morphology of the final connected layer is explored. Combined with SEM, EDS, the microscopic morphology, and hermeticity affecting the final ceramic–metal composite component is discussed. Finally, through the indirect brazing process, various ceramic–metal composite joints with good airtightness satisfying the requirements were prepared.

Progressive damage characteristics of screwed single-lap CFRPI-metal joint subjected to tensile loading at RT and 350°C

This paper outlines progressive damage characteristics of screwed single-lap CFRPI-metal joints subjected to tensile loading at RT (room temperature) and 350°C. Quasi-static tensile tests were performed on screwed single-lap CCF300/AC721-30CrMnSiA joint at RT and 350°C, and the load versus displacement curve, strength and stiffness of joint were gauged and discussed. With due consideration of thermal-mechanical interaction and complex failure mechanism, a modified progressive damage model (PDM) based on the mixed failure criterion was devised to simulate progressive damage characteristics of screwed single-lap CCF300/AC721-30CrMnSiA joint, and simulations correlate well with experiments. By using the PDM, the effects of geometry dimensions on mechanical characteristics of screwed single-lap CCF300/AC721-30CrMnSiA joint were analyzed and discussed.

Technological support of fixed split joint impermeability in two-stage circuit of production organization

The oretical equations are shown for the calculation of fixed split joint impermeability taking into account contact-ing surface quality. There are given theoretical and empirical dependences for the definition of quality parameters in parts surfaces for different methods of their processing. A two-stage design-technological support of fixed split metal joint impermeability is presented.

Manufacturing technology and strength properties of new composite joints

The paper presents the concept, technology of manufacturing and assembly of a new metal-composite-metal joint. The presented joint can be used in many constructions, especially in lightweight supporting structures. The research of the strength properties of the analysed composite joints of load-bearing structures is also presented.