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Mechanical Properties and Manufacturing Processes of FRP Composite Materials
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Mechanical Properties and Manufacturing Processes of FRP Composite Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 3269

Special Issue Editors

Dr. Tian-Qiao Liu

E-Mail Website
Guest Editor
Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing, China
Interests: Pultruded Fiber Reinforced Polymer (FRP) composites; new structures of FRP composite; theoretical and practical developments of FRPs in the field of civil engineering
Dr. Alexander Safonov

E-Mail Website
Guest Editor
Skoltech Center for Design, Manufacturing, and Materials (CDMM), Skoltech Institute of Science and Technology, Moscow, Russia
Interests: composite behaviour; hybrid materials; thermoplastics; thermosets; FE modelling; fracture mechanics
Special Issues, Collections and Topics in MDPI journals
Dr. Daniel Carlos Taissum Cardoso

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, Pontifícia Universidade Católica (PUC-Rio), Rio de Janeiro, Brazil
Interests: composite materials; structural design; FRP; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent decades, fiber-reinforced polymer (FRP) composites have been increasingly adopted in the field of engineering to achieve a reduced weight, a prolonged service life, or improved structural performance. Applications of FRP composites mainly lie in their advantages of high strength- and stiffness-to-weight ratios, superior corrosion resistance, excellent fatigue performance, etc. FRP composites can be manufactured through various techniques depending on the desired mechanical properties and geometries, and the most common techniques include pultrusion, filament winding, vacuum-assisted resin transfer molding, compression molding, wet lay-up, etc.

This Special Issue is seeking research on the mechanical properties and manufacturing techniques of FRP composites. To align with the scope of the journal, only research on materials for engineering is welcome.

Dr. Tian-Qiao Liu
Dr. Alexander Safonov
Dr. Daniel Carlos Taissum Cardoso
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • FRP composites
  • mechanical properties
  • manufacturing techniques
  • experimental characterizations
  • finite element modeling
  • mechanics of FRP composites

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Published Papers (2 papers)

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Research

19 pages, 21188 KiB  
Article
Study on CFRP-Strengthened Welded Steel Plates with Inclined Welds Considering Welding Residual Stress
by Xinyu Ding, Xu Liang, Man-Tai Chen and Lili Hu
Materials 2024, 17(8), 1804; https://doi.org/10.3390/ma17081804 - 14 Apr 2024
Cited by 1 | Viewed by 1267
Abstract
Welded steel plates are widely used in various structural applications, and the presence of inclined welds is often encountered in practical scenarios. Carbon fiber reinforced polymer (CFRP) has been proven to be effective for strengthening steel structures. However, the behavior of CFRP-strengthened welded [...] Read more.
Welded steel plates are widely used in various structural applications, and the presence of inclined welds is often encountered in practical scenarios. Carbon fiber reinforced polymer (CFRP) has been proven to be effective for strengthening steel structures. However, the behavior of CFRP-strengthened welded steel plates with inclined welds, particularly considering the influence of welding residual stress, is limited. This paper aims to investigate the tensile behavior of CFRP-strengthened welded Q355 steel plates with inclined welds considering welding residual stress (WRS). First, WRS data were obtained by the X-ray diffraction (XRD) method at different locations. The maximum tensile and compressive residual stresses are 0.39 and 0.14 times the yield strength of the steel, respectively. Then, finite element models were established to investigate the effects of weld angles, weld width, and height on the WRS distribution of welded steel plates. Finally, the tensile performance of CFRP-strengthened welded plates with WRS was studied by numerical simulation. The results showed that the weld angles have little effect on the distribution pattern of residual stress but significantly affect the peak tensile WRS. When the weld angle changes from 0° to 60°, the peak tensile WRS decreases significantly from 0.32 to 0.06 times the yield strength of steel; furthermore, the influence of weld width and height on WRS is relatively limited. Under tension loading, the maximum stress occurs near the weld. The ends of the weld enter the yielding state later than the middle part of the weld due to the distribution of the WRS. As the weld angle increases and the length of the weld increases, the stress in the weld zone decreases, while the stress in the base material zone correspondingly increases. In addition, CFRP strengthening can reduce the magnitude of stress. This study provides preliminary references for understanding the tensile behavior of CFRP-strengthened welded steel plates with inclined welds. Full article
(This article belongs to the Special Issue Mechanical Properties and Manufacturing Processes of FRP Composite Materials)
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17 pages, 8248 KiB  
Article
Experimental and Numerical Investigation of the Mechanical Properties of a CFRP Tendon–Wedge Assembly Loaded under Transverse Compressive Loading
by Qinghua Han, Xiwen Zheng and Lichen Wang
Materials 2023, 16(9), 3305; https://doi.org/10.3390/ma16093305 - 23 Apr 2023
Viewed by 1466
Abstract
Carbon-fiber-reinforced polymer (CFRP) tendons have become a viable alternative to steel cables in cable roof structures owing to their high tensile strength, low weight, and resistance to corrosion. However, the effective anchoring of CFRP tendons is a challenge because of their poor transverse [...] Read more.
Carbon-fiber-reinforced polymer (CFRP) tendons have become a viable alternative to steel cables in cable roof structures owing to their high tensile strength, low weight, and resistance to corrosion. However, the effective anchoring of CFRP tendons is a challenge because of their poor transverse mechanical properties. Therefore, the mechanical properties of CFRP tendons and a tendon–wedge assembly under transverse compression were investigated by simulating the force environment of the CFRP tendon inside an integrated-wedge anchorage. The deformation of and local damage to CFRP tendons under transverse compression were explored using load–strain curves and full-field strain measured using digital image correlation. The experimental and numerical results show that large-diameter CFRP tendons with a length in the range of 90–110 mm had better cross-sectional deformation resistance and more stable transverse mechanical properties. Longer CFRP tendons with larger diameters have lower contact compressive stress and local maximal shear stress under the same transverse compressive load. Based on the analysis of the experimental and numerical results, we propose design suggestions for tendon size selection and integrated-wedge design details, such as the manufacturing materials of the wedge, the radius through the gap of the wedge, and the radial difference of the groove, to improve the anchoring properties and efficiency of the integrated-wedge anchorage. Full article
(This article belongs to the Special Issue Mechanical Properties and Manufacturing Processes of FRP Composite Materials)
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