Article
Chemistry, Physical
Xinyi Xiao, Hanbin Xiao
Summary: Robotic additive manufacturing faces challenges in terms of collision and support structure. We propose a systematic approach to automate the planning procedures and overcome these challenges. By integrating collision-avoidance conditions into the model decomposition step, we generate the entire workspace for the robotic additive building platform and enable autonomous manufacturing of large and complex metal components.
Article
Materials Science, Multidisciplinary
Bo Hong, Yuanyuan Qu, Yuxiang Hong, Menglong Li, Yeming Zou
Summary: In this paper, the device tuning accuracy is introduced into the wire-arc deposition model for the first time, establishing a wire-arc stable deposition model in micro-plasma arc directional energy deposition. A well-formed 40-layer curved metal sample with a high material area utilization ratio was achieved using the proposed model and optimized deposition parameters. This study provides theoretical guidance for improving the stability and deposition accuracy in micro-plasma arc freeform fabrication.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Theo Calais, Naresh D. Sanandiya, Snehal Jain, Elgar Kanhere, Siddharth Kumar, Raye Chen-Hua Yeow, Pablo Valdivia Y. Alvarado
Summary: FL-3DP utilizes yield stress gel as a temporary support for freeform liquid three-dimensional printing, enabling processing of a broader class of inks and demonstrating superior capabilities in the field of soft robotics.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Xiangshuo Li, Zhengjun Yao, Xuewei Tao, Mengxin Yao, Shasha Zhang
Summary: A thin-wall structure of Ti6Al4V-3Cu was prepared using electron beam freeform fabrication (EBF3) with Cu plated wire and a novel in-situ alloying method. The addition of Cu led to significant refinement of prior-beta grain, resulting in improved strength without significant decrease in ductility.
Article
Materials Science, Composites
Wenlong Xu, Yong Du, Qiufeng Meng
Summary: In this study, a thermoelectric composite was prepared using MoS2 as filler and SV4 slurry with PEDOT:PSS as matrix through solution 3D printing technology. The composites showed decreased electrical conductivity with the increase of MoS2 content, but achieved the highest power factor at 360 K with 69 wt% of MoS2. Additionally, the composite exhibited good flexibility after bending 300 times at a radius of 3.02 mm.
COMPOSITES COMMUNICATIONS
(2021)
Review
Chemistry, Multidisciplinary
Houman Honaryar, Saba Amirfattahi, Zahra Niroobakhsh
Summary: Liquid-in-liquid 3D printing techniques that rely on the interaction or association of two liquid phases have been developed for fabricating complex structures from a wide range of soft materials. This review article provides an overview of these techniques, including their fundamentals, underlying mechanisms, characterization techniques for structural stability assurance, and practical properties of prints. The future paths and potential applications are also discussed.
Review
Cell & Tissue Engineering
Hyun Lee, Tae-Sik Jang, Ginam Han, Hae-Won Kim, Hyun-Do Jung
Summary: Freeform 3D printing has significantly advanced the fabrication of artificial tissues with vascularized structures, utilizing a supporting matrix to optimize the printing quality and performance. The technique is potentially applicable for complex 3D objects with curved and irregular shaped vascular networks, but requires careful consideration of material properties and challenges for effective design and selection.
JOURNAL OF TISSUE ENGINEERING
(2021)
Article
Engineering, Manufacturing
Xiangbin Zeng, Zijie Meng, Zhennan Qiu, Jiankang He, Jinhai Fan, Dichen Li
Summary: We developed a new melt-based embedded printing strategy to fabricate polycaprolactone (PCL) structures with complex overhanging geometries within a thermally stable supporting matrix. By optimizing various parameters, including the concentration of the supporting matrix and inter-filament thickness, we achieved stable printing of PCL filaments with a smallest width of 50.6 +/- 4.7 μm. This innovative strategy allows for the fabrication of flexible polymeric scaffolds with complex structural organizations for soft tissue engineering.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Review
Materials Science, Multidisciplinary
Livia M. Kalossaka, Giovanni Sena, Laura M. C. Barter, Connor Myant
Summary: The use of hydrogels in academic research is growing rapidly and becoming more relevant to real-life applications, especially in the field of soilless cultivation substrates. Additive Manufacturing (AM) has enabled the manufacturing of hydrogel structures with customized properties, paving the way for new functionalities and applications. The challenges and future prospects of printing soilless cultivation substrates are being explored, with a focus on features similar to soil achieved through the fabrication process.
APPLIED MATERIALS TODAY
(2021)
Article
Engineering, Mechanical
Mohammad Reza Khosravani, Zeljko Bozic, Ali Zolfagharian, Tamara Reinicke
Summary: This study investigates the effects of accelerated thermal ageing on the mechanical behavior of 3D-printed parts and describes the influence of manufacturing defects on the fracture behavior of these components. The results indicate the effects of thermal ageing on the structural integrity of the specimens, which were printed with different raster orientations.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Biomedical
Harsha Ramaraju, April M. Landry, Subhadra Sashidharan, Abhishek Shetty, Sarah J. Crotts, Kevin O. Maher, Steven L. Goudy, Scott J. Hollister
Summary: This study presents a generalized strategy for manufacturing patient-specific medical devices using selective laser sintering (SLS) in adherence to FDA guidance. Using the example of an Airway Support Device, the study demonstrates the process of design and material assessment to create verified devices that achieve desired results. The proposed process serves as a template for quality control of personalized 3D printed implants.
Article
Engineering, Manufacturing
Zhiyue Liang, Zhenyu Liao, Haoyu Zhang, Zixiang Li, Li Wang, Baohua Chang, Dong Du
Summary: In this study, we developed a real-time closed-loop control method to improve the stability of the molten pool size in electron beam directed energy deposition (EB-DED) technology. The segmented control strategy effectively mitigated interference and input changes, enhancing the stability of the molten pool.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Rui Tao, Floriane Granier, Daniel Therriault
Summary: In this work, flexible piezoelectric composite sensors with integrated electrodes were successfully fabricated using multi-material extrusion-based 3D printing technology. The printing technique relied on the extrusion of two paste-like materials: piezoelectric and conductive composite inks. The comprehensive characterization of the inks and supporting fluid was performed, and three types of piezoelectric composite demonstrators were tested under tension or compression. The results showed consistent piezoelectric performance and good shape fidelity compared to the designed models. This fabrication approach opens up new opportunities for flexible piezoelectric structures in sensing and energy harvesting applications.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Luciano Borasi, Enrico Casamenti, Raphael Charvet, Cyril Denereaz, Sacha Pollonghini, Lea Deillon, Tao Yang, Fatmah Ebrahim, Andreas Mortensen, Yves Bellouard
Summary: Producing freeform three-dimensional micro-components out of copper, silver or gold and their alloys remains an engineering challenge, but a faster alternative approach using femtosecond laser micromachining and selective etching in amorphous silica has been introduced. This method allows for the creation of metal micro-components with micron-scale resolution, freeform geometry, dense metal composition, and high processing speed, enabling new micro-device architectures.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Manufacturing
Piljae Joo, Yimin Yao, Nicholas Teo, Sadhan C. Jana
Summary: A 3D-printing process is utilized to manufacture modular aerogel/acrylate bricks, which can be fully customized and scaled for thermal insulation applications. By combining 3D-printing tools with a sol-gel method for aerogel synthesis, the study overcomes the geometric limitations of producing large load-bearing aerogel products. The research focuses on the characteristics of two-component aerogel bricks and discusses the thermal properties and mechanical strength of the bricks in contact heating situations.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Analytical
Jinle Zeng, Baohua Chang, Dong Du, Guodong Peng, Shuhe Chang, Yuxiang Hong, Li Wang, Jiguo Shan
Article
Chemistry, Multidisciplinary
Renhe Ji, Baohua Chang, Li Wang, Wenzhu Wang, Dong Du
APPLIED SCIENCES-BASEL
(2018)
Article
Chemistry, Multidisciplinary
Baohua Chang, Zhang Yuan, Haitao Pu, Haigang Li, Hao Cheng, Dong Du, Jiguo Shan
APPLIED SCIENCES-BASEL
(2017)
Article
Chemistry, Analytical
Jinle Zeng, Baohua Chang, Dong Du, Li Wang, Shuhe Chang, Guodong Peng, Wenzhu Wang
Article
Chemistry, Physical
Shuo Yang, Dong Du, Baohua Chang
Article
Chemistry, Analytical
Yuxiang Hong, Baohua Chang, Guodong Peng, Zhang Yuan, Xiangchun Hou, Boce Xue, Dong Du
Article
Materials Science, Multidisciplinary
Xiangchun Hou, Dong Du, Kaiming Wang, Yuxiang Hong, Baohua Chang
Article
Chemistry, Multidisciplinary
Baohua Chang, Hong Xiao, Jinle Zeng, Shuo Yang, Dong Du, Jianling Song, Guoliang Han
APPLIED SCIENCES-BASEL
(2018)
Article
Chemistry, Physical
Xiangchun Hou, Dong Du, Baohua Chang, Ninshu Ma
Article
Materials Science, Multidisciplinary
Baohua Chang, Zhang Yuan, Hao Cheng, Haigang Li, Dong Du, Jiguo Shan
Article
Chemistry, Analytical
Angang Wei, Baohua Chang, Fanyue Meng, Dong Du, Zandong Han
Article
Chemistry, Analytical
Boce Xue, Baohua Chang, Dong Du
Summary: This research proposes a multi-output model based on a lightweight CNN architecture and PSO technique for monitoring multiple state properties of high-speed laser welding, capturing melt pool images through high-speed imaging and building a dataset. The results show that the proposed model can accurately and efficiently monitor multiple welding state properties, and interpretation and discussion through visualization methods deepen the understanding of the relationship between melt pool appearance and welding state.
Article
Chemistry, Physical
Boce Xue, Baohua Chang, Shenghua Wang, Runshi Hou, Peng Wen, Dong Du
Summary: This research explains the formation of humping defects in high-speed laser welding through high-speed imaging experiments and numerical simulation, and discovers the effectiveness of adding a Tungsten Inert Gas arc in suppressing the defects.
Article
Chemistry, Physical
Baohua Chang, Zhang Yuan, Haitao Pu, Haigang Li, Hao Cheng, Dong Du, Jiguo Shan