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Weak Fiber Bragg Grating Array-Based In Situ Flow and Defects Monitoring During the Vacuum-Assisted Resin Infusion Process.
Sensors (Basel)
November 2024
School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China.
Monitoring of real-time flow and defects in the vacuum-assisted resin infusion (VARI) process can provide important guidelines for full impregnation of dry reinforcement. A weak fiber Bragg grating array was employed to obtain quasi-distributed monitoring results in real-time. Sensitivity testing of different kinds of coated optical fiber sensors (OFs) was carried out first, and the polyacrylate-coated OF showed a greater wavelength-shift response than the polyimide-coated one.
View Article and Find Full Text PDFVacuum Chamber Infusion for Fiber-Reinforced Composites.
Polymers (Basel)
September 2024
Institute of Aircraft Design (IFB), University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany.
A new approach to an automatable fiber impregnation and consolidation process for the manufacturing of fiber-reinforced composite parts is presented in this article. Therefore, a vacuum chamber sealing machine classically used in food packaging is modified for this approach-Vacuum Chamber Infusion (VCI). Dry fiber placement (DFP) preforms, made from 30 k carbon fiber tape, with different layer amounts and fiber orientations, are infused with the VCI and with the state-of-the-art process-Vacuum Assisted Process (VAP)-as the reference.
View Article and Find Full Text PDFClosed-incision negative-pressure wound therapy after Bascom's cleft lift surgery for pilonidal sinus disease: A randomized study comparing healing.
Colorectal Dis
October 2024
Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
Article Synopsis
- The study aimed to compare the effectiveness of closed-incision negative-pressure wound therapy (NPWT) versus conventional care in promoting wound healing after Bascom's cleft lift surgery for complicated pilonidal sinus disease.
- After recruiting 118 patients, the results showed no significant difference in healing rates between the NPWT group and the control group at both the 2-week and 12-week follow-ups.
- Overall, NPWT did not improve postoperative healing compared to conventional methods, and the control group reported better self-esteem outcomes post-surgery.
Empyema Necessitatis Caused by and Resolved with Vacuum-Assisted Closure System: A Case Report.
Microorganisms
September 2024
Research Unit, Hospital Regional de Alta Especialidad de Ixtapaluca, IMSS-BIENESTAR. Calle Gustavo E. Campa 54, Col. Guadalupe Inn, Alcaldía Álvaro Obregón, Mexico City 01020, Mexico.
Article Synopsis
- Empyema necessitatis can occur from untreated or poorly managed empyema, and the case presented involved an 11-year-old girl with pre-existing risks like overcrowding and incomplete vaccinations.
- She exhibited symptoms of a dry cough and was diagnosed with complicated pneumonia, which led to the use of an endopleural tube and initial antibiotic treatments.
- Despite treatment, her condition worsened, requiring additional interventions; finally, tailored antibiotics and VAC therapy resulted in significant improvement after 26 days.
Intelligent Process Monitoring of Smart Polymer Composites Using Large Area Graphene Coated Fabric Sensor.
Chemphyschem
July 2024
School of Engineering, Swinburne University of Technology, Hawthorn, Victoria, 3122, Australia.
The location of defect formed in the final composite is identified using sensor data. Herein, we report the development of an online process monitoring system for vacuum-assisted resin transfer molding (VARTM) process using large area graphene coated in-situ fabric sensor. Besides imparting excellent mechanical properties to the final composites, these sensors provide critical information during the composite processing including detecting defects and evaluating processing parameters.
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