Advanced Manufacturing: Polymer & Composites Science最新文献_第3页

Towards automation of wind energy rotor blade production: a review of challenges and application examples 迈向风能转子叶片生产自动化:挑战与应用实例综述

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-11-05 DOI: 10.1080/20550340.2020.1838224

J. Ohlendorf, M. Richrath, J. Franke, M. Brink, K. Thoben

引用次数: 3

In situ resin age assessment using dielectric analysis and resin cure map for efficient vacuum infusion 利用介电分析和树脂固化图进行有效真空灌注的原位树脂年龄评估

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-10-21 DOI: 10.1080/20550340.2020.1834790

J. Shin, S. Nutt

引用次数: 1

Process robustness and defect formation mechanisms in unidirectional semipreg 单向半孕的工艺稳健性和缺陷形成机制

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-10-15 DOI: 10.1080/20550340.2020.1834789

W. Edwards, Patricio Martínez, S. Nutt

{"title":"Process robustness and defect formation mechanisms in unidirectional semipreg","authors":"W. Edwards, Patricio Martínez, S. Nutt","doi":"10.1080/20550340.2020.1834789","DOIUrl":"https://doi.org/10.1080/20550340.2020.1834789","url":null,"abstract":"Abstract Out-of-autoclave/vacuum-bag-only (OoA/VBO) composite processing has emerged as an alternative to autoclave cure, addressing economic, environmental, and production flexibility limitations associated with autoclave production. VBO processing can produce defect-free components under ideal processing conditions; however, adverse process conditions (e.g. poor vacuum) commonly encountered in manufacturing environments result in unacceptably high scrap rates, preventing more widespread adoption of such techniques. This work explores how modifications to prepreg format can increase process robustness. A unidirectional (UD) prepreg was produced with a customized, discontinuous resin distribution, henceforth referred to as semipreg. The semipreg exhibited through-thickness permeability orders of magnitude greater than conventional hot-melt VBO prepregs. The semipreg also was less sensitive to variations in process conditions than conventional VBO prepreg. In situ process monitoring allowed observation and identification of two defect formation mechanisms arising during cure of the custom prepreg. Resin feature topography played a critical role in these mechanisms, indicating its importance to the design of next generation VBO semipregs. Graphic abstract","PeriodicalId":7243,"journal":{"name":"Advanced Manufacturing: Polymer & Composites Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78684361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

An investigation of in-situ AFP process parameters using CF/LM-PAEK 基于CF/LM-PAEK的原位AFP工艺参数研究

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-10-07 DOI: 10.1080/20550340.2020.1826772

I. Schiel, L. Raps, A. Chadwick, I. Schmidt, Manuel Simone, S. Nowotny

{"title":"An investigation of in-situ AFP process parameters using CF/LM-PAEK","authors":"I. Schiel, L. Raps, A. Chadwick, I. Schmidt, Manuel Simone, S. Nowotny","doi":"10.1080/20550340.2020.1826772","DOIUrl":"https://doi.org/10.1080/20550340.2020.1826772","url":null,"abstract":"Abstract In recent years the use of thermoplastics has become popular in aerospace applications, with a primary focus on fiber-reinforced composites. Displaying greatly improved mechanical properties, new components using these materials still need to be characterized and their suitability for aviation applications demonstrated. A common restriction to the implementation of fiber-reinforced thermoplastic parts is the almost default autoclave manufacturing, which is both time consuming and expensive. Aiming for a more economical final product, this study utilizes a one-step in-situ Automated Fiber Placement (AFP) process to produce samples for mechanical and thermal characterization. The recently developed and highly popular material CF/LM-PAEK was used within this study, with the four major AFP processing parameters varied to assess material sensitivity. Test samples were manufactured using Design of Experiment (DoE). Subsequently, single lap shear (SLS) and differential scanning calorimetry (DSC) tests were performed to assess consolidation quality. With rising tooling temperature, both SLS strength and crystallinity increase up to 31 MPa and 25%, respectively. A post-manufacturing tempering process improved crystallinity of the tested CF/LM-PAEK specimens up to 29% and SLS strength up to 38 MPa. Within the tested parameter range, CF/LM-PAEK appeared to be unaffected by increasing layup speed, which is a promising aspect with regard to faster industrial production. Graphical Abstract","PeriodicalId":7243,"journal":{"name":"Advanced Manufacturing: Polymer & Composites Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85323852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Effective cure cycle development via flow optimization and advanced cure environments 通过流程优化和先进的固化环境，有效开发固化周期

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-09-01 DOI: 10.1080/20550340.2020.1815276

D. Kim, S. Nutt

{"title":"Effective cure cycle development via flow optimization and advanced cure environments","authors":"D. Kim, S. Nutt","doi":"10.1080/20550340.2020.1815276","DOIUrl":"https://doi.org/10.1080/20550340.2020.1815276","url":null,"abstract":"Abstract Out-time and moisture absorption in prepregs are generally unavoidable in an industrial setting, where prepreg layup can take weeks. The resin cross-linking and viscosity increase that occurs during out-time can reduce resin flow during a specified cure cycle, causing porosity. In this study, a flow-optimized cure cycle was developed, leveraging both flow level and time during out-of-autoclave (OoA) processing. First, predictive cure kinetics and viscosity models were used to model viscosity evolution under selected cure conditions, accounting for initial out-times and humidity conditioning. To quantify resin flow, an ‘effective flow number’ metric was defined as the integration of inverse viscosity evolution until the resin gelation point. The method described revealed that a rapid heating rate achieved by use of advanced tooling was essential to achieve a high effective flow number. The experimental results showed that the effective flow number is a useful criterion to limit flow-induced defects. The method presented also extends the boundary (by 175%) of the manufacturer’s specified out-life for OoA prepreg materials. Graphical Abstract","PeriodicalId":7243,"journal":{"name":"Advanced Manufacturing: Polymer & Composites Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84257730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Path-dependent bond-line evolution in equilibrated core honeycomb sandwich structures 平衡核心蜂窝夹层结构中路径依赖的键线演化

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-08-10 DOI: 10.1080/20550340.2020.1800194

D. Zebrine, M. Anders, T. Centea, S. Nutt

引用次数: 2

Permeability of co-cured honeycomb sandwich skins: effect of gas transport during processing 共固化蜂窝夹层皮的透气性:加工过程中气体输送的影响

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-08-04 DOI: 10.1080/20550340.2020.1802685

Trisha Palit, T. Centea, M. Anders, D. Zebrine, S. Nutt

{"title":"Permeability of co-cured honeycomb sandwich skins: effect of gas transport during processing","authors":"Trisha Palit, T. Centea, M. Anders, D. Zebrine, S. Nutt","doi":"10.1080/20550340.2020.1802685","DOIUrl":"https://doi.org/10.1080/20550340.2020.1802685","url":null,"abstract":"Abstract Potential links between pressure conditions during co-cure of honeycomb sandwich panels, the extent of gas flow through facesheet and bond-line, and the level of permeability in the cured skin were evaluated. Half-sandwich structures comprised of fiber-reinforced polymer facesheets, film adhesive, and core were fabricated using a custom-built lab fixture. Autoclave, bag, and core pressures were varied to produce controlled, constant pressure differences during cure, and the resulting skins were tested for permeability using a fixture constructed to measure gas flow rate across the skins and to locate gas flow pathways. Facesheet cross-sections were analyzed to evaluate porosity. Porosity and the number of gas flow pathways were correlated to permeability, but significant gas flow was possible without high void content or with few channels, as pressure differentials led to complex variations in permeability. Overall, the study provides new insights into gas transport during composites processing and manufacturing, and the results provide guidance for modifying manufacturing processes to ensure part quality.","PeriodicalId":7243,"journal":{"name":"Advanced Manufacturing: Polymer & Composites Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87561355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Experimental and numerical investigations of pressure-controlled resin transfer molding (PC-RTM) 压力控制树脂传递模塑(PC-RTM)的实验与数值研究

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-07-02 DOI: 10.1080/20550340.2020.1805689

Julian Seuffert, P. Rosenberg, L. Kärger, F. Henning, M. H. Kothmann, G. Deinzer

引用次数: 9

Use of experimental design to obtain polymeric microfibers with carbon nanotubes 利用实验设计获得含碳纳米管的高分子微纤维

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-06-25 DOI: 10.1080/20550340.2020.1779438

A. Rosenberger, Jean Hardt, D. Dragunski, Franciele Fernanda da Silva, P. Bittencourt, R. Bariccatti, E. Muniz, M. R. Simões, J. Caetano

引用次数: 3

Design and application of discontinuous resin distribution patterns for semi-pregs 半浸渍树脂不连续分布模式的设计与应用

Advanced Manufacturing: Polymer & Composites Science Pub Date : 2020-04-02 DOI: 10.1080/20550340.2020.1736864

S. Schechter, Lessa K. Grunenfelder, S. Nutt

引用次数: 4