Details
| Original language | English |
|---|---|
| Pages (from-to) | 308-316 |
| Number of pages | 9 |
| Journal | Composites Part A: Applied Science and Manufacturing |
| Volume | 117 |
| Early online date | 3 Dec 2018 |
| Publication status | Published - Feb 2019 |
Abstract
Selectively adjusting the tackiness of epoxy pre-impregnated carbon fibers is considered mandatory in terms of process stability of automated lay-up and draping. This experimental study investigates the influence of crucial process and material parameters such as temperature, compaction force, debonding rate and ageing on prepreg tack using a rheometer as a test apparatus. Accompanying material characterization is conducted in terms of cure kinetics and rheology to establish a profound understanding of tack-determining mechanisms and material behavior. Two evaluated tack indicators are found to be sensitive to temperature and steadily increased as a function of compaction stress. The maximum tack plateau of progressively aged prepreg shifts towards higher temperatures. Material is still processable after tack life with tack properties exceeding the adhesive performance of fresh prepreg when being processed at elevated temperatures. Tackiness of impregnated tape for automated draping and aerospace epoxy prepreg differs in both quantitative extent and pivotal mechanisms.
Keywords
- A. Carbon fibers, Add. Keyword: Prepreg Tack, C. Process modelling, E. Lay-up (manual/automated)
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Mechanics of Materials
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In: Composites Part A: Applied Science and Manufacturing, Vol. 117, 02.2019, p. 308-316.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Interaction of process parameters and material properties with regard to prepreg tack in automated lay-up and draping processes
AU - Budelmann, D.
AU - Detampel, H.
AU - Schmidt, C.
AU - Meiners, D.
N1 - Funding Information: This work was supported by the European Regional Development Fund (ERDF), the federal state of Lower Saxony, Germany and the Federal Ministry for Economic Affairs and Energy , Germany. The authors would like to acknowledge the financial support by the European Regional Development Fund (ERDF) and the federal state of Lower Saxony granted for the interdisciplinary research project ‘FlexProCFK’. Further gratitude is expressed to the Federal Ministry for Economic Affairs and Energy for financially supporting the research project ROBUFIL.
PY - 2019/2
Y1 - 2019/2
N2 - Selectively adjusting the tackiness of epoxy pre-impregnated carbon fibers is considered mandatory in terms of process stability of automated lay-up and draping. This experimental study investigates the influence of crucial process and material parameters such as temperature, compaction force, debonding rate and ageing on prepreg tack using a rheometer as a test apparatus. Accompanying material characterization is conducted in terms of cure kinetics and rheology to establish a profound understanding of tack-determining mechanisms and material behavior. Two evaluated tack indicators are found to be sensitive to temperature and steadily increased as a function of compaction stress. The maximum tack plateau of progressively aged prepreg shifts towards higher temperatures. Material is still processable after tack life with tack properties exceeding the adhesive performance of fresh prepreg when being processed at elevated temperatures. Tackiness of impregnated tape for automated draping and aerospace epoxy prepreg differs in both quantitative extent and pivotal mechanisms.
AB - Selectively adjusting the tackiness of epoxy pre-impregnated carbon fibers is considered mandatory in terms of process stability of automated lay-up and draping. This experimental study investigates the influence of crucial process and material parameters such as temperature, compaction force, debonding rate and ageing on prepreg tack using a rheometer as a test apparatus. Accompanying material characterization is conducted in terms of cure kinetics and rheology to establish a profound understanding of tack-determining mechanisms and material behavior. Two evaluated tack indicators are found to be sensitive to temperature and steadily increased as a function of compaction stress. The maximum tack plateau of progressively aged prepreg shifts towards higher temperatures. Material is still processable after tack life with tack properties exceeding the adhesive performance of fresh prepreg when being processed at elevated temperatures. Tackiness of impregnated tape for automated draping and aerospace epoxy prepreg differs in both quantitative extent and pivotal mechanisms.
KW - A. Carbon fibers
KW - Add. Keyword: Prepreg Tack
KW - C. Process modelling
KW - E. Lay-up (manual/automated)
UR - http://www.scopus.com/inward/record.url?scp=85058019450&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2018.12.001
DO - 10.1016/j.compositesa.2018.12.001
M3 - Article
AN - SCOPUS:85058019450
VL - 117
SP - 308
EP - 316
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
SN - 1359-835X
ER -