Details
| Original language | English |
|---|---|
| Article number | 114509 |
| Journal | Composite structures |
| Volume | 275 |
| Publication status | Published - 1 Nov 2021 |
| Externally published | Yes |
Abstract
This paper presents a comparative study of the geometrical optimization of mechanical wedge–barrel anchors for prestressed carbon fiber-reinforced polymer (CFRP) rods. Various anchor configurations were simulated using three-dimensional finite-element (FE) models. The FE models were validated using the draw-ins of the wedges, which were measured in static tensile tests. The configurations consisted of a steel barrel and aluminum wedges, taking advantage of the previous anchors. The conical profile of the wedge and barrel in different configurations had either a curve or a constant differential angle. In addition, a series of geometric modifications were introduced to the wedge at the loading using a fillet or cut. The stress concentration on the CFRP rod was evaluated using failure index Fs in the Tsai–Wu failure criterion for composite materials. The results of the FE simulations showed that a greater differential angle resulted in a smaller stress concentration at the loading end of the anchor and the modifications led to a reduction in the stress concentration. In addition, the anchor with a curved profile was selected as the optimal design because it had the smallest stress concentration owing to the smooth transition of the differential angle distribution along the wedge profile.
Keywords
- CFRP rods, Finite element (FE), Prestressed tendons, Wedge–barrel anchor
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite structures, Vol. 275, 114509, 01.11.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - FE analysis and experimental validation of mechanical wedge–barrel anchors for CFRP rods
AU - Heydarinouri, Hossein
AU - Vidovic, Aleksandar
AU - Nussbaumer, Alain
AU - Ghafoori, Elyas
N1 - Funding Information: The authors acknowledge the Innosuisse Swiss Innovation Agency (Grant ID: 19240.1 PFIW-IW) for funding this research project and the project partners, namely the S&P Clever Reinforcement Company AG, Switzerland, the Swiss Federal Railways (SBB) AG, Bern, and dsp Ingenieure + Planer AG Engineering Office, Uster, Switzerland. We also thank the laboratory technicians of the Structural Engineering Research Laboratory of Empa for their support in conducting the experiments. Publisher Copyright: © 2021 The Author(s)
PY - 2021/11/1
Y1 - 2021/11/1
N2 - This paper presents a comparative study of the geometrical optimization of mechanical wedge–barrel anchors for prestressed carbon fiber-reinforced polymer (CFRP) rods. Various anchor configurations were simulated using three-dimensional finite-element (FE) models. The FE models were validated using the draw-ins of the wedges, which were measured in static tensile tests. The configurations consisted of a steel barrel and aluminum wedges, taking advantage of the previous anchors. The conical profile of the wedge and barrel in different configurations had either a curve or a constant differential angle. In addition, a series of geometric modifications were introduced to the wedge at the loading using a fillet or cut. The stress concentration on the CFRP rod was evaluated using failure index Fs in the Tsai–Wu failure criterion for composite materials. The results of the FE simulations showed that a greater differential angle resulted in a smaller stress concentration at the loading end of the anchor and the modifications led to a reduction in the stress concentration. In addition, the anchor with a curved profile was selected as the optimal design because it had the smallest stress concentration owing to the smooth transition of the differential angle distribution along the wedge profile.
AB - This paper presents a comparative study of the geometrical optimization of mechanical wedge–barrel anchors for prestressed carbon fiber-reinforced polymer (CFRP) rods. Various anchor configurations were simulated using three-dimensional finite-element (FE) models. The FE models were validated using the draw-ins of the wedges, which were measured in static tensile tests. The configurations consisted of a steel barrel and aluminum wedges, taking advantage of the previous anchors. The conical profile of the wedge and barrel in different configurations had either a curve or a constant differential angle. In addition, a series of geometric modifications were introduced to the wedge at the loading using a fillet or cut. The stress concentration on the CFRP rod was evaluated using failure index Fs in the Tsai–Wu failure criterion for composite materials. The results of the FE simulations showed that a greater differential angle resulted in a smaller stress concentration at the loading end of the anchor and the modifications led to a reduction in the stress concentration. In addition, the anchor with a curved profile was selected as the optimal design because it had the smallest stress concentration owing to the smooth transition of the differential angle distribution along the wedge profile.
KW - CFRP rods
KW - Finite element (FE)
KW - Prestressed tendons
KW - Wedge–barrel anchor
UR - http://www.scopus.com/inward/record.url?scp=85112310537&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2021.114509
DO - 10.1016/j.compstruct.2021.114509
M3 - Article
AN - SCOPUS:85112310537
VL - 275
JO - Composite structures
JF - Composite structures
SN - 0263-8223
M1 - 114509
ER -