Application Of 3D Printing Technology Research Articles

Influence of intermittent opening density on mechanical behavior and fracture characteristics of 3D-printed rock

To investigate the influence of intermittent opening density on the mechanical behavior and fracture characteristics of rock, sand 3D-printed specimens containing different opening numbers are prepared using quartz silica sand and furan resin adhesive as printing substrates. Uniaxial compression testing is performed on these rock-like specimens. Based on digital image correlation (DIC) technology, a methodology for identifying crack types and evaluating rock damage is proposed to quantify the mechanical mechanism of crack evolution during loading. The experimental results are verified and explained using the rock failure process analysis (RFPA) code. The results show that with increasing intermittent opening density, the stress–strain curves of the specimens are similar. Meanwhile, the increase in intermittent opening density causes the stress field distribution of the specimen to change, which in turn leads to a decrease in the uniaxial compressive strength and elastic modulus. The types of cracks around the opening can be grouped into tensile cracks (T) and shear cracks (S), and the coalescence modes of the rock bridge between the openings can be grouped into shear coalescence (C1) and traction coalescence (C2). As the intermittent opening density increases, the coalescence type between openings changes from C1 to C2, and the overall failure pattern is converted from tensile-shear failure to tensile failure. The damage factor (Df) evolution is closely related to the intermittent opening density of the specimens. A one-way exponential decay correlation between the stress ratio and the damage factor is found. The above study is expected to deepen the understanding of the deformation and fracture mechanism of rock masses with openings and to provide a reference for the application of 3D printing technology in the rock mechanics field.

Application of 3D Printing Technology in Fashion Design

Application of 3D Printing Technology in Fashion Design

Acelularna 3D štampa u hirurškoj rekonstrukciji koštanih defekata

In medicine, 3D printing represents one of the fastest-growing fields, which has awakened the highest expectations in biomedicine. It is predominantly used when replacing autografts and xenografts with alloplastic personalized tissue substitutes and constructs. This publication will present an overview of contemporary literature dealing with acellular 3D printing in reconstructing bone defects. It will also describe the 3D printing technology, the scope and the main problems it faces in reconstructing bone defects. This review will include the application of 3D printing technology in preoperative surgical planning, the creation of personalized medical models and surgical guides, as well as acellular 3D printing in bone tissue engineering, i.e. in the production of bone scaffolds. It will briefly refer to the application of 3D printing in our country since the available literature indicates a contrast between the current needs and the use of this technology in reconstructive skeletal surgery in Serbia. The neglected and unused benefits of modern 3D printing methods burden the health system with significant socio-economic consequences for public health.

A LITERATURE REVIEW ON 3D PRINTING TECHNOLOGIES IN EDUCATION

This study will offer domestic and foreign studies on the application of 3D printing technologies in the fields of education. The aim of this study was to review the studies that had been done in the literature on the application of 3D printing technology in the field of education. Purposive sampling method was used in the study. In this context, it was decided that in the current study, variables such as the distribution of studies on the use of 3D printer technology in the field of education by years, publication types, sample types and sizes, data collection tools and analysis methods were planned to be examined, and at the same time, in-depth analysis of the results was the most appropriate method. 101 studies were accessed in accordance with this research. One of the qualitative research methods used in the study was document analysis, and the data was analysed by examining at the documents that contained details regarding the facts that were the focus of the study. According to the data obtained, it is seen that the studies carried out on 3D printing technology between 2009-2022 are within the scope of educational activities at the K-12 level (physics, chemistry, biology, mathematics) and their numbers have increased especially after 2017. It was determined that undergraduate students were preferred the most as the sample group. It was found that, on general, qualitative research methodologies were preferred in the studies under consideration. It was seen that in-class assessments, observations and questionnaires were mostly used as data collection tools. It has been determined that content analysis is generally used in the analysis of the collected data. When the relationship between education and 3D printing technology was examined, it was determined that it can be adapted to all ages and fields and provides great convenience in interdisciplinary studies. Based on these findings, it is thought that it will be more effective to focus on the instructional aspect of 3D printing technology.

Easy-to-swallow mooncake using 3D printing: Effect of oil and hydrocolloid addition

3D printing is a promising technology for food production, capable of producing and developing personalized food products. In recent years, research on the application of 3D printing technology to create easy-to-swallow foods for the elderly with dysphagia has received extensive attention. In this study, we applied dual nozzle 3D printing technology to develop an easy-to-swallow mooncake food using a traditional Chinese food, mooncake, as a model system. We optimized the printing dough ink formulation by setting up soybean oil gradient experiments and Arabic gum gradient experiments, and then we applied the optimized dough ink as the crust of the mooncake to produce easy-to-swallow mooncakes. The experimental results show that the addition of 2.5 g of soybean oil and 0.125 g of Arabic gum could improve the texture of the dough product and reduce its hardness and adhesiveness. The mooncake produced with this crust dough ink was rated in the IDDSI texture level four, which met expectations. Therefore, this work provides insights into the development of easy-to-swallow food products.

Progress in the application of 3D printing technology in ophthalmology.

Three-dimensional printing (3DP) technology is a rapid prototyping technology that is widely used in the medical field. It can be combined with computer-aided design, material manufacturing, and other technologies to construct medical-related appliances, human implants and even cell-based models or biological tissues. In the field of ophthalmology, the technology can be used to manufacture ocular anatomical models, glasses, intraocular implants, microsurgical instruments, drugs, etc. It can also enable future 'bioprinting', involving the refractive and nervous systems of the eyeball, with excellent development prospects in the field. This review introduces the development of 3DP technology in ophthalmology and discusses its application and potential.

Application of 3D Printing Technology in the Medical Field

Background: 3D printing technology is widely used, with its application majorly prevailing in the medical field. Objective: In this paper, the applications of 3D printing technology in the medical field are classified and summarized, and their characteristics are introduced. Methods: This paper mainly summarizes the contribution of 3D printing technology to the field of medicine, as well as four applications of 3D printing technology in medicine, and also introduces some examples of clinical application of 3D printing. Results: 3D printing has proved to be an emerging art and a new innovation. It has a variety of different medical applications. Because of its limitations, it is not routinely used in clinical practice. However, it will be open to the public in the near future due to technological advances. It will provide new opportunities for every healthcare provider and seeker, and it will become a modern technology for innovative medical practices. Conclusion: 3D printing technology has been significantly developed and applied to oral cavity, implants and even human organs in the medical field，and shows a vigorous development trend. It is believed that this technology will significantly benefit mankind in the future.

Thermoplastic Polyurethane Based on the 3d Printing Fashion Clothing-Conceptual Model of The Fashion Industry

Abstract The application of 3D printing technology has been relatively slow in the fashion industry. Both in the fashion industry and in 3D printing, the material used plays a very important role. In this direction, thermoplastic polyurethane (TPU) is one material that has started to grab the attention of researchers, producers, and customers. While many have studied 3D printing technology using thermoplastic polyurethane material in the fashion industry from different perspectives, fewer researchers have addressed the actual adoption of thermoplastic polyurethane based 3D printing in the fashion industry. Thus, the present research has been focused to propose an adoption model for thermoplastic polyurethane based 3D-printed fashion clothes. Factor analysis was conducted to find and analyse the most relevant factors. Further exploratory factor analysis was conducted to test the proposed model. The study proposed a model for adoption based on four factors: motivation to buy, customer attitude, and the challenges and benefits associated with the adoption of thermoplastic polyurethane based 3-D printed fashion clothes.

3D printing of hydrodynamic coupling for school education

The application of 3D printing technologies in the industry is growing as new possibilities for their application are discovered, which take advantage of their functionalities. Also, today more and more 3D technology is used for educational purposes. Incorporating of 3D printing in the form of production of three dimensional shapes into the teaching process improved the understanding of geometry.Hydrodynamic couplings works on the hydrodynamic principle, which takes place based of the indirect principle of operation. The pump wheel transfers the introduced mechanical energy into the kinetic energy through the fluid flow. The fluid of higher energy flows centrically from the pump wheel to the turbine wheel, where re-conversion to mechanical energy takes place. In this paper, the description and principles of operation of hydrodynamic couplings are presented, as well as their basic characteristics and advantages. Also, the calculation of one hydrodynamic coupling and its 3D model that would be used in the education system are given.

Application of 3D Printing Technologies for the Manufacture of Master Models in Mechanical Engineering

Application of 3D Printing Technologies for the Manufacture of Master Models in Mechanical Engineering

Application of 3D printing technology combined with PBL teaching method in clinical teaching of cerebrovascular disease: An observational study

Traditional clinical teaching does not allow medical students to combine theoretical knowledge with practical knowledge. As such, we aimed to determine the effectiveness of three dimensional (3D) printing technology combined with problem-based learning (PBL) in the clinical teaching of cerebrovascular diseases. Medical interns were randomly divided into an experimental group (n = 136) that was taught using 3D printing technology + PBL method and a control group (n = 133) that was taught using traditional methods. We compared assessment results of theoretical and clinical practice skills and the subjective evaluation of teaching methods between the 2 groups. The assessment results of the experimental group were significantly higher than those in the control group (P < .05). The survey assessing the evaluation of teaching methods showed higher satisfaction with teaching methods, increased learning interest, and improvement in the spatial thinking ability of interns in the experimental group compared to the control group (P < .05). There was no significant difference when assessing which teaching method better improved the interns' understanding of cerebrovascular diseases (P < .05). The application of 3D printing technology combined with the PBL teaching method in neurosurgery clinical teaching can stimulate interest in learning and significantly improve academic performance and problem-analysis and solving skills.

Application of Internet +3D printing technology in the construction of English teaching platform

In order to explore the application of Internet +3D printing technology in the construction of English teaching platform, the author first elaborated the concept of teaching, then, based on learning theory, "learning by doing" theory and activity theory, a framework of learning activity design in the application of 3D printing technology in teaching is constructed. Compared with the traditional teaching model, the Internet + flipped classroom teaching model can make full use of the fragmentary learning time before and after class, task-based teaching activities should be carried out in face-to-face teaching classes, but they should be properly applied according to different teaching situations in order to exert their effectiveness, for example, in the teaching of "3D printing technology" in the course of "Mechanical Engineering English", according to the learning situation of higher vocational students, the knowledge points with low memory and difficulty should be placed before class, difficult knowledge points, task-based teaching activities and laboratory observation and operation activities are put into the class for "partial flipping", supplemented by after-class expansion, so that students can grasp knowledge and skillfully use skills.

Application of 3D Printing Technology and Porous Nano-Ceramic Decorative Sheet in Interior Landscape Design

In order to solve the problems that the traditional ceramic method is difficult to form porous ceramics with complex structures, the mold production cycle is long, and the cost is high, the authors propose the application of 3D printing technology and porous nano-ceramic decorative sheet in interior landscape design. Based on the use of photocuring molding technology to make high-precision regular resin molds, optimize the low-viscosity, high-solid content alumina ceramic slurry required by the gel injection molding process and form alumina ceramic blanks by means of a vacuum pressure process, so as to realize the net shape of complex structural porous ceramic parts. In view of the filling problem of ceramic slurry in complex structure in the process, the effects of slurry pH value, dispersant dosage, and vacuum pressurization process on ceramic molding were studied, and parameters such as porosity and compressive strength of the green body were tested. Experimental results show the following. Under the conditions of pH value of 9, mass fraction of dispersant of 0.4%, and vacuum pressure of 90 min, alumina ceramics with a volume fraction of 52% can be prepared, the porosity is 51.5%, and the compressive strength is 40.1 MPa. The ceramic material prepared by this process has complete structure and smooth surface and can be used as a process for preparing porous ceramic parts with complex structure.

The application of 3D printing technology for developing a lumbar support garment for obese women

The purpose of this study was to develop a lumbar support garment, using three-dimensional (3D) printing technology, that has a good fit and great aesthetics for obese women in their 30s and 40s. To this end, a survey was conducted to investigate consumers’ satisfaction with commercially available lumbar supports. One participant with class 2 obesity, aged between 30 and 49 years, with previous experience of back pain and wearing a lumbar support, was selected for the 3D body scanning procedure. A lumbar support was designed based on the 3D shape data obtained by the 3D body scan of the participant and was then printed using a 3D printer. The lumbar support garment was designed as a sleeveless wrap-style innerwear piece combined with lumbar support. Cross-sectional comparisons, a wear test, and an appearance evaluation were also conducted. The cross-sectional comparisons confirmed that wearing the lumbar support garment straightened the back and waist posture and tightened the abdomen. Three obese women in their 30s and 40s were recruited for the wear test and, based on the test results, the lumbar support garment scored very high on air permeability, material, washing, and long wearability. Furthermore, because the lumber support garment can be worn under another garment, the participants felt more comfortable psychologically. The support also received good scores on appearance evaluations. However, spine experts suggested reducing the support’s thickness to improve its functionality and appearance.

Three-dimensional printing and 3D slicer powerful tools in understanding and treating neurosurgical diseases.

With the development of the 3D printing industry, clinicians can research 3D printing in preoperative planning, individualized implantable materials manufacturing, and biomedical tissue modeling. Although the increased applications of 3D printing in many surgical disciplines, numerous doctors do not have the specialized range of abilities to utilize this exciting and valuable innovation. Additionally, as the applications of 3D printing technology have increased within the medical field, so have the number of printable materials and 3D printers. Therefore, clinicians need to stay up-to-date on this emerging technology for benefit. However, 3D printing technology relies heavily on 3D design. 3D Slicer can transform medical images into digital models to prepare for 3D printing. Due to most doctors lacking the technical skills to use 3D design and modeling software, we introduced the 3D Slicer to solve this problem. Our goal is to review the history of 3D printing and medical applications in this review. In addition, we summarized 3D Slicer technologies in neurosurgery. We hope this article will enable many clinicians to leverage the power of 3D printing and 3D Slicer.

Combined use of 3D printing and computer-assisted navigation in the clinical treatment of multiple maxillofacial fractures

ObjectivesIn the field of computer-assisted surgery, 3D printing technology and computer-aided navigation (CAN) technology have led to advances in craniofacial surgery. However, the application of these two techniques in maxillofacial fractures is mostly limited to unilateral zygomatic bone and zygomatic arch fractures, and few studies have investigated their use for multiple maxillofacial fractures. This study summarizes the combined application of 3D printing technology and CAN for complex maxillofacial fractures to guide clinical practice. Materials and methodsTwenty-six patients with multiple maxillofacial fractures from 09/2017 to 03/2021 were retrospectively studied and divided according to surgical method into an experimental group (navigation-aided surgery combined with a 3D-printed guide) and a control group (navigation-aided surgery only). The surgical time was compared between the groups, and posttreatment computed tomography and follow-up visits were conducted at 1 week and 3 months, respectively, to compare the quality of treatment in terms of infection, occlusal disorder, restricted mouth opening, midline displacement, and bilateral asymmetry. ResultsAccording to our results, the combined use of CAN and 3D printing significantly improved the treatment results of double-sided maxillofacial fractures (rs = 0.448, P < 0.05). The surgical time of the experimental group was significantly shorter than that of the control group (Z = −2.083, P < 0.05). ConclusionsThis study broadens our understanding of the treatment of multiple maxillofacial fractures. The combined use of 3D printing technology and CAN effectively shortened the operation time and achieved a better therapeutic effect.

Assessment of the adoption of 3D printing technology for construction delivery: A case study of Lagos State, Nigeria

The innovations of the fourth industrial revolution (industry 4.0) encouraged the application of 3D printing technology to complement and subsequently replace the conventional construction method. This study assessed the awareness, application, drivers and barriers to the adoption of 3D printing technology for construction with a view to enhancing faster and sustainable construction process. Primary data were obtained with the use of structured questionnaires which were self-administered to medium and small-sized construction firms/contractors in Lagos State. Data collected were analyzed using descriptive and inferential statistics. The study established that the awareness and application levels of the technology are still very low. The findings showed that there exist statistically significant differences (0.039 ≤ p ≤ 0.017) in 6 drivers for the adoption of 3D printing technology, which is influenced by the client’s demand and desire. The study further established that inadequate power supply limits the adoption of 3D printing in the Nigerian construction industry. Implications are indicated by the findings on drivers and barriers of the technology which could help the construction industry in developing countries towards capability improvement for better adoption of 3D printing innovation and enhanced sustainable construction process.

Utilization of recycled construction powder in 3D concrete printable materials through particle packing optimization

With the enhancement of awareness of environmental protection and sustainable development, reuse of industrial solid waste has gradually attracted people’s attention. The utilization of recycled construction powder (RCP) and recycled construction aggregate(RCA)in the production of 3D concrete printable material(3DPM) can not only reduce carbon emissions, but also promote the application of 3D printing technology by reducing material costs. Considering the defect of low-reactivity and inferior property of RCP, the appropriate RCP is screened out according to the modified Andreasen and Andersen model to optimize the gradation of printable materials. Influence of RCP on the fresh property is investigated by rheological experiment and the incipient failure height test. The results show that the addition of 10%RCP would increase the yield stress from 1423Pa to 1573Pa and maintain the viscosity of the material. Moreover, unconfined compressive strength test, isothermal calorimetry and mercury intrusion porosimetry test are also used to characterize the properties of 3DPM. The results show that although the addition of RCP reduces the total heat release of 3DPM, it also reduces the macropore(¿1000 nm) of 3DPM from 10.7% to 7.1%, and keep the compressive strength within an acceptable range through the gradation optimization. Finally, the results of laboratory printing or industrial printing also confirm the printing performance of 3DPM.

Novel Formulations Containing Fluorescent Sensors to Improve the Resolution of 3D Prints.

Three-dimensional printing in SLA (stereolithography) and DLP (digital light processing) technologies has recently been experiencing a period of extremely rapid development. This is due to the fact that researchers recognise the many advantages of 3D printing, such as the high resolution and speed of the modelling and printing processes. However, there is still a search for new resin formulations dedicated to specific 3D printers allowing for high-resolution prints. Therefore, in the following paper, the effects of dyes such as BODIPY, europium complex, and Coumarin 1 added to light-cured compositions polymerised according to the radical mechanism on the photopolymerisation process speed, polymerisation shrinkage, and the final properties of the printouts were investigated. The kinetics of the photopolymerisation of light-cured materials using real-time FT-IR methods, as well as printouts that tangibly demonstrate the potential application of 3D printing technology in Industry 4.0, were examined. These studies showed that the addition of dyes has an effect on obtaining fluorescent prints with good resolution.

Preparation of TNT/HMX-based melt-cast explosives with enhanced mechanical performance by fused deposition modeling (FDM)

ABSTRACT The 3D printing (or additive manufacturing) of energetic materials (EMs) has gained attention due to its innovative manufacturing method and excellent performance of products. To explore the application of 3D printing technology in melt-cast explosives, a fused deposition modeling (FDM) 3D printer was developed to fabricate TNT/HMX-based explosive grains (φ20 mm×20 mm) that were composed of 60 wt.% TNT and 40 wt.% superfine HMX. The influences of printing speed, printing temperature, and layer thickness on the printed grains were investigated by factorial design experiments. According to the printing process, the formation mechanism of FDM 3D-printed TNT/HMX-based explosives was explored and proposed, which mainly included extruded, contacted, micro-fused and solidified, and bonded. Then, a series of characterization methods were used to investigate the morphology and structure of the printed grains. The tested results showed that the density of the printed grains reached 98.6% of the theoretical density, and the compressive strength and tensile strength of printed grains were 87.5% and 66.7% higher than the cast ones, respectively, which indicated the printed grains have higher density and mechanical performance. This work was expected to provide a valuable idea and basis for the 3D printed melt-cast explosives with complex structure and high performance.