共查询到18条相似文献,搜索用时 178 毫秒
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混凝土3D打印是现代数字化制造的典型代表,因其智能化、个性化、绿色建造的工艺优势受到广泛关注。作为一种新型建造方式,3D打印为建筑业带来了颠覆性的影响,并对传统混凝土材料提出了全新的挑战。如何提升混凝土材料与3D打印技术的适应性,实现3D打印技术在建筑中的广泛应用是人们普遍关注的焦点。本文概述了混凝土3D打印技术的发展历程,系统论述了混凝土3D打印材料在流变性、可挤出性、可建造性以及力学性能方面的研究现状,同时,介绍了3D打印模板技术在装饰及异型构筑物上的典型应用,以期为混凝土3D打印的研究与未来工程发展提供一定的参考与借鉴。 相似文献
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3D打印是近年来发展起来的高新技术,已在机械制造等行业取得很大成功,在材料和建筑等领域也有所发展.本文在介绍通用3D打印技术进展的基础上,着重阐述了混凝土材料的传统施工工艺、国内外3D打印混凝土技术与其材料和施工工艺的发展现状,讨论了3D打印混凝土当前所面临的问题,并对3D打印混凝土提出了未来展望. 相似文献
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3D打印技术对于一些小批量、复杂零部件的制造具有性价比高、材料浪费少的明显优势,已经成为结构复杂零件成型领域中的重要技术之一,本文介绍了3D打印相关配套技术及其优缺点,以及3D打印在轮胎生产制造过程中的生产与应用。 相似文献
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3D打印混凝土作为建筑打印施工的油墨材料,近年来受到热点关注。本文通过对3D打印混凝土的应用、研究和专利申请进行分析,对其未来发展进行展望。 相似文献
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3D打印技术因其操作简单便捷、成型快速灵活、可制备复杂结构的器件等优点,在精密陶瓷零件制造方面具有广泛应用。本文根据3D打印陶瓷的材料形态综述不同3D打印技术在陶瓷制备方面的特点,重点介绍了陶瓷3D打印成型技术中直写式3D打印、光固化3D打印、喷墨3D打印等技术所涉及的粘结剂、分散剂等组分的应用及作用机理,并对水基和非水基两种类型的添加剂组分进行总结和探讨,以期为3D打印技术制备高性能陶瓷样件提供参考。 相似文献
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Fengbo Sun Xiaodan Sun Hetong Wang Chunxu Li Yu Zhao Jingjing Tian Yuanhua Lin 《International journal of molecular sciences》2022,23(10)
Polylactic acid–glycolic acid (PLGA) has been widely used in bone tissue engineering due to its favorable biocompatibility and adjustable biodegradation. 3D printing technology can prepare scaffolds with rich structure and function, and is one of the best methods to obtain scaffolds for bone tissue repair. This review systematically summarizes the research progress of 3D-printed, PLGA-based scaffolds. The properties of the modified components of scaffolds are introduced in detail. The influence of structure and printing method change in printing process is analyzed. The advantages and disadvantages of their applications are illustrated by several examples. Finally, we briefly discuss the limitations and future development direction of current 3D-printed, PLGA-based materials for bone tissue repair. 相似文献
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The extrusion-based 3D printing process offers advantages, such as high precision, low cost, high speed, simplicity, and the ability to deposit multiple materials simultaneously. However, using 3D printing composite materials with orthogonal anisotropy can limit the interlayer bonding strength of printed parts. In this study, the interlayer tensile strength of 3D-printed polylactic acid (PLA) was affected by adding 0.5 wt% cellulose nanocrystals (CNC) and 1.2 wt% di-cumyl peroxide (DCP) to PLA, and annealing at low temperature (373 K, 1 h). The effects of annealing and CNC were determined by mechanical testing, scanning electron microscopy, differential scanning calorimetry, expansion testing, rheological testing, and x-ray diffraction analysis. After annealing, the interlayer gap increased due to crystal shrinkage, leading to a 25.9% decrease in tensile strength. However, the addition of CNC and DCP significantly improved the flow properties of the sample, resulting in better interlayer bonding and a 52.7% increase in tensile strength. 相似文献
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Polyolefins are the largest class of commercially available synthetic polymers that are extensively used in a variety of applications from commodities to engineering owing to their low cost of production, good physico-mechanical properties, light weight, good processability, and recyclability. Compared to conventional molding techniques, fused deposition modeling (FDM)-based 3D printing is a smart manufacturing technology for thermoplastics due to its low cost, ease of production of complex geometrical parts, rapid prototyping, and scalable customization. FDM 3D printing can be an ideal manufacturing technology for polyolefins to manufacture various complex parts. However, FDM 3D-printing of polyolefins is challenged bycritical printing problems like high warpage, dimensional inaccuracies, poor bed adhesion, and poor layer-to-layer adhesion. In this review, a fundamental understanding of polyolefins and their FDM 3D-printing process is established, and the recent progress of FDM 3D printing of polyolefins is summarized. Furthermore, strategies to overcome warpage and to improve mechanical strength of the 3D-printed polyolefins are provided. Finally, future prospectives of FDM 3D-printing of polyolefins are critically discussed to inspire prospective research in this field. It is believed that this review article can be tremendously useful for research work related to FDM of polyolefin-based materials. 相似文献
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Sunghan Kim Volodymyr F. Korolovych Rachel L. Muhlbauer Vladimir V. Tsukruk 《应用聚合物科学杂志》2020,137(44):49381
Three-dimensional (3D) printing is an attractive approach to fabricate highly porous extremely lightweight structures for architecture antivibrational packaging. We report 3D printing processing of model packaging structures using biodegradable poly(lactic acid) (PLA) as a source material, with acrylonitrile butadiene styrene (ABS) utilized as a common 3D printing source material as a traditional benchmarked material. The effects of printing temperature, speed, and layer morphology on the layer-by-layer 3D-printed structures and their mechanical properties were considered. Three different characteristic morphologies were identified based on printing temperature; the microscopic surface roughness was dependent on the printing speed and layer height. We demonstrate that the mechanical performances and surface properties of 3D-printed PLA structures could be improved by optimization of printing conditions. Specifically, we evaluate that these PLA-based 3D structures printed exhibited better surface qualities and enhanced mechanical performance than traditional ABS-based structures. Results showed that the PLA-based 3D structures possessed the favorable mechanical performance with 34% higher Young's modulus and 23% higher tensile strength in comparison to the ABS-based 3D structures. This study provides guidelines for achieving high-quality 3D-printed lightweight structures, including smooth surfaces and durable mechanical properties, and serves as a framework to create biodegradable 3D-printed parts for human use. 相似文献
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从增材制造的实现原理出发,分析了当前几种主流三维(3D)成型工艺的技术特点、设备原理及实现流程。以工业级3D打印机为研究平台,将熔融沉积成型(FDM)工艺应用于复杂型腔结构和传动组件结构的快速成型,通过3D建模、数据转化、切片处理、工艺参数选择、模型包计算及工艺后处理等一系列环节的实践探索,明确了FDM成型工艺的技术原理与应用流程,并成功制作了丙烯腈丁二烯苯乙烯共聚物(ABS)材质的3D打印模型。结果表明,复杂型腔零件切片厚度为0.254 mm、传动组件切片厚度为0.178 mm时,3D成型件具有理想的工艺精度和打印效率。 相似文献
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本文就3D打印混凝土的可塑造性能的评价工作展开研究,包括成型时间、承载力、变形和失稳控制.成型时间是打印混凝土试体硬化特征的判别依据,本文提出和设计了可塑造时间比的评价及测试方法;针对于打印混凝土承载力的评价,给出了统一流变模型的实验方法与参数获取手段;分析了打印混凝土材料在可塑造性能研究中的变形控制问题,提出了两项变形控制的评价方法,还给出了打印混凝土失稳破坏的控制指标;最后,通过控制打印行程时间与混凝土材料硬化强度增长关系及试体载重特征值的关系,推导出了3D打印混凝土结构总攀升高度的计算方法. 相似文献
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Khan Rajib Hossain Pan Jiang Xinle Yao Jiayu Wu Danli Hu Xingxing Yang Tao Wu Xiaolong Wang 《大分子材料与工程》2023,308(11):2300147
The fast growth of 3D printing technology gives designers many ways to make structures that are hard to see. 3D printing lets you customize complex structures in any way you want and make rapid prototypes of materials. It enables you to simulate things more effectively. So far, experiments with polymer-based lubrication have been done on atomically smooth surfaces, under dynamic conditions, and on the nano- or micro-scale. Polymer-based lubrication in 3D printing has been studied in depth, which has made it possible to make significant, multifunctional 3D structures with microscale accuracy. It is a crucial way to approach lubrication and has sparked much scientific interest. A thorough literature review is done to keep track of the latest advances in 3D printing for structural polymer-based lubrication simulation. The design and lubrication performance quality of bio-inspired, different-sized simulation structures is given much attention. The material requirements, skills, and representative applications of various 3D printing technologies are summarized. The efficient directions for future research in designing and making 3D-printed lubrication structures are also pointed out. 相似文献