Innovative Joint for Cable Dome Structure Based on Topology Optimization and Additive Manufacturing

Du, Wenfeng; Wang, Hui; Zhu, Liming; Zhao, Yang; Wang, Yingqi; Hao, Runqi; Yang, Mijia

doi:10.3390/ma14185158

Cited by 10 publications

(3 citation statements)

References 30 publications

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“…Due to strict environmental regulations, modern production strives for a lightweight design of mechanical components [1]. Engineering tools such as topology optimization represent feasible methods to combine application-tailored parts and economic production [2,3]. Such designs often lead to complex-shaped components possessing thin-walled cross-sections and therefore high loading conditions of their respective parts.…”

Section: Introductionmentioning

confidence: 99%

A Numerically Efficient Method to Assess the Elastic–Plastic Strain Energy Density of Notched and Imperfective Cast Steel Components

2023

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The fatigue strength of cast steel components is severely affected by manufacturing process-based bulk and surface imperfections. As these defect structures possess an arbitrary spatial shape, the utilization of local assessment methods is encouraged to design for service strength. This work applies the elastic–plastic strain energy density concept to study the fatigue strength properties of a high-strength cast steel alloy G12MnMo7-4+QT. A fatigue design limit curve is derived based on non-linear finite element analyses which merges experimental high-cycle fatigue results of unnotched and notched small-scale specimens tested at three different stress ratios into a unique narrow scatter band characterized by a scatter index of 1:TΔW¯(t)=2.43. A comparison to the linear–elastic assessment conducted in a preceding study reveals a significant improvement in prediction accuracy which is assigned to the consideration of the elastic–plastic material behaviour. In order to reduce computational effort, a novel approximation is presented which facilitates the calculation of the elastic–plastic strain energy density based on linear–elastic finite element results and Neuber’s concept. Validation of the assessment framework reveals a satisfying agreement to non-linear simulation results, showing an average root mean square deviation of only approximately eight percent in terms of total strain energy density. In order to study the effect of bulk and surface imperfections on the fatigue strength of cast steel components, defect-afflicted large-scale specimens are assessed by the presented elastic–plastic framework, yielding fatigue strength results which merge into the scatter band of the derived design limit curve. As the conducted fatigue assessment is based solely on linear–elastic two-dimensional simulations, the computational effort is substantially decreased. Within the present study, a reduction of approximately 400 times in computation time is observed. Hence, the established assessment framework presents an engineering-feasible method to evaluate the fatigue life of imperfective cast steel components based on rapid total strain energy density calculations.

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Section: Introductionmentioning

confidence: 99%

A Numerically Efficient Method to Assess the Elastic–Plastic Strain Energy Density of Notched and Imperfective Cast Steel Components

2023

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“…The string-supported dome structure is a new type of efficient large-span building structure, which is usually a new hybrid space structure system combining the upper single-layer mesh shell and the lower cable rod system [1][2][3]. The structure has reasonable force and cleverly combines the advantages of both single-layer mesh shell and cable dome, which is a high-performance structure with reasonable force science and is widely used in large public buildings such as stadiums and convention centers [4][5][6][7]. Given that such structures are characterized by dense crowds and large flows of people, attention needs to be paid to their structural safety, so the study of the effects of explosions, impacts and other dynamic effects of chord-supported domes cannot be missing [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Research on the prediction method of string-supported dome cable force based on digital twin technology

Meng,

Yu,

Xue

2023

Applied Mathematics and Nonlinear Sciences

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To improve the accuracy of rope force prediction and the safety of the construction process. In this paper, based on digital twin technology in the design process, digital twins of physical entities in virtual space are constructed using digital to achieve digital control and optimization of physical entities. The structural response information collected by sensors is brought into the dynamic load identification method by calculating the solution method of the dynamic load of the digital twin technology. The damping effect is considered in the load vector. The displacement is eliminated by constructing an average loss function to disperse the motion time to solve for the dynamic load imposed on the structure and obtain the load-bearing state of the structure for dome cable force prediction. To verify the feasibility of the model, the results of the cable force prediction analysis show that the overall displacement of the mesh shell displacement nodes at the bishop number 200-400 has a more uniform step distribution, and the cable force of the internal and external radial cables has a small change in the predicted structural cable force at the position of 40° angle with the long axis. Thus, it can be seen that the cable force prediction of a circular chord-supported dome with digital twin technology can break the tradition and further improve structural safety and implementability.

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“…Kanyilmaz et al [ 28 ] utilized 3D printing technology to achieve a nature-inspired optimization design of steel tubular joints. Du et al [ 29 ] conducted an integrated study of topology optimization and additive manufacturing on a cable-dome bearing joint and obtained the result that when the density support was 15%, the surface of the manufactured joint was relatively smooth. Compared with conventional fabrication technologies, 3D printing can manufacture complex structural models, effectually simplifying production processes and shortening manufacturing cycles [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Generative Design and Integrated 3D Printing Manufacture of Cross Joints

Han

Xia

et al. 2022

Materials

Self Cite

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The integrated process of design and fabrication is invariably of particular interest and important to improve the quality and reduce the production cycle for structural joints, which are key components for connecting members and transferring loads in structural systems. In this work, using the generative design method, a pioneering idea was successfully realized to attain a reasonable configuration of the cross joints, which was then consecutively manufactured using 3D printing technology. Firstly, the initial model and generation conditions of a cross joint were constructed by the machine learning-based generative design algorithm, and hundreds of models were automatically generated. Then, based on the design objective and cost index of the cross joint, three representative joints were selected for further numerical analysis to verify the advantages of generative design. Finally, 3D printing was utilized to produce generative joints; the influences of printing parameters on the quality of 3D printing are further discussed in this paper. The results show that the cross joints from the generative design method have varied and innovative configurations and the best static behaviors. 3D printing technology can enhance the accuracy of cross joint fabrication. It is viable to utilize the integrated process of generative design and 3D printing to design and manufacture cross joints.

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Innovative Joint for Cable Dome Structure Based on Topology Optimization and Additive Manufacturing

Cited by 10 publications

References 30 publications

A Numerically Efficient Method to Assess the Elastic–Plastic Strain Energy Density of Notched and Imperfective Cast Steel Components

A Numerically Efficient Method to Assess the Elastic–Plastic Strain Energy Density of Notched and Imperfective Cast Steel Components

Research on the prediction method of string-supported dome cable force based on digital twin technology

Generative Design and Integrated 3D Printing Manufacture of Cross Joints

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