국내 최대 기계 및 로봇 연구정보

기술보고서

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타이틀	Materials for Heated Head Automated Thermoplastic Tape Placement
저자	Jensen, Brian J.;; Kinney, Megan C.;; Cano, Roberto J.;; Grimsley, Brian W.
Keyword	AUTOCLAVES;; AUTOMATIC CONTROL;; COMPOSITE MATERIALS;; FABRICATION;; HEAT MEASUREMENT;; HIGH RESOLUTION;; PEEK;; PREPREGS;; RESIN TRANSFER MOLDING;; SURFACE ROUGHNESS;; THERMOPLASTICITY;; THERMOSETTING RESINS
URL	http://hdl.handle.net/2060/20120009354
보고서번호	NF1676L-13743
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	NASA Langley Research Center (LaRC) is currently pursuing multiple paths to develop out of autoclave (OOA) polymeric composite materials and processes. Polymeric composite materials development includes the synthesis of new and/or modified thermosetting and thermoplastic matrix resins designed for specific OOA processes. OOA processes currently under investigation include vacuum bag only (VBO) prepreg/composite fabrication, resin transfer molding (RTM), vacuum assisted resin transfer molding (VARTM) and heated head automated thermoplastic tape placement (HHATP). This paper will discuss the NASA Langley HHATP facility and capabilities and recent work on characterizing thermoplastic tape quality and requirements for quality part production. Samples of three distinct versions of APC-2 (AS4/PEEK) thermoplastic dry tape were obtained from two materials vendors, TENCATE, Inc. and CYTEC Engineered Materials** (standard grade and an experimental batch). Random specimens were taken from each of these samples and subjected to photo-microscopy and surface profilometry. The CYTEC standard grade of APC-2 tape had the most voids and splits and the highest surface roughness and/or waviness. Since the APC-2 tape is composed of a thermoplastic matrix, it offers the flexibility of reprocessing to improve quality, and thereby improve final quality of HHATP laminates. Discussions will also include potential research areas and future work that is required to advance the state of the art in the HHATP process for composite fabrication.