Bast Fiber Decortication for Biocomposites by a Mastication Process

IF 2.4 3区 工程技术 Q3 ENGINEERING, MANUFACTURING Journal of Manufacturing Science and Engineering-transactions of The Asme Pub Date : 2023-07-10 DOI:10.1115/1.4062913
D. Walczyk, Jiachen Yang, Jennifer Gilbert-Jenkins
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Abstract

This paper discusses a new method for decorticating bast fiber stalks through a mastication process without damaging the fiber for use in biocomposites. Conventional automated decortication methods provide high stalk processing throughput, but they significantly damage the bast fibers and adversely affect their performance in biocomposite applications. Initial experiments with industrial hemp using a matched set of tools indicate that indexing the stalk by, at most, half a tooling period for each mastication cycle maximizes both the crushed stalk flexing action and dehurding efficiency. Further process insight was gained through simple stalk crushing experiments (force vs. deflection) between matching teeth with no indexing, where force spikes correspond to initial collapse of the stalk cross section and initial hurd bending fracture along the stalk length. A more extensive experimental design with stiffer tooling reveals that adding spaces in the bottom die for hurd to fall through, and using the smallest practical indexing distance less than half a tooling period and also more teeth maximizes hurding efficiency. However, shorter indexing and more teeth also decreases throughput rate and complicates stalk handling. Future work for optimizing and commercializing the process are suggested.
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生物复合材料中韧皮纤维的脱胶工艺
本文讨论了一种在不损坏生物复合材料中使用的韧皮纤维的情况下,通过胶粘工艺对韧皮纤维茎进行脱胶的新方法。传统的自动去壳方法提供了高的秸秆处理量,但它们会严重损坏韧皮纤维,并对其在生物复合材料应用中的性能产生不利影响。使用一套匹配的工具对工业大麻进行的初步实验表明,在每个咀嚼循环中,将秸秆分度至多半个工具周期,可以最大限度地提高粉碎秸秆的弯曲作用和除湿效率。通过在没有分度的匹配齿之间进行简单的秸秆粉碎实验(力与偏转),获得了进一步的过程见解,其中力尖峰对应于秸秆横截面的初始塌陷和沿着秸秆长度的初始hurd弯曲断裂。使用更硬的工具进行的更广泛的实验设计表明,在底模中增加空间,使跨栏通过,并使用不到半个工具周期的最小实际分度距离和更多的齿,可以最大限度地提高跨栏效率。然而,更短的分度和更多的齿也会降低生产率,并使秸秆处理复杂化。提出了优化和商业化该工艺的未来工作。
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来源期刊
CiteScore
6.80
自引率
20.00%
发文量
126
审稿时长
12 months
期刊介绍: Areas of interest including, but not limited to: Additive manufacturing; Advanced materials and processing; Assembly; Biomedical manufacturing; Bulk deformation processes (e.g., extrusion, forging, wire drawing, etc.); CAD/CAM/CAE; Computer-integrated manufacturing; Control and automation; Cyber-physical systems in manufacturing; Data science-enhanced manufacturing; Design for manufacturing; Electrical and electrochemical machining; Grinding and abrasive processes; Injection molding and other polymer fabrication processes; Inspection and quality control; Laser processes; Machine tool dynamics; Machining processes; Materials handling; Metrology; Micro- and nano-machining and processing; Modeling and simulation; Nontraditional manufacturing processes; Plant engineering and maintenance; Powder processing; Precision and ultra-precision machining; Process engineering; Process planning; Production systems optimization; Rapid prototyping and solid freeform fabrication; Robotics and flexible tooling; Sensing, monitoring, and diagnostics; Sheet and tube metal forming; Sustainable manufacturing; Tribology in manufacturing; Welding and joining
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