GLORIA

GEOMAR Library Ocean Research Information Access

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Li, Jun  (2)
  • Tian, Miao  (2)
  • Engineering  (2)
Material
Publisher
Person/Organisation
Language
Years
Subjects(RVK)
  • Engineering  (2)
RVK
  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2021
    In:  Textile Research Journal Vol. 91, No. 21-22 ( 2021-11), p. 2656-2668
    In: Textile Research Journal, SAGE Publications, Vol. 91, No. 21-22 ( 2021-11), p. 2656-2668
    Abstract: The performance of firefighters’ clothing will deteriorate due to various exposures. Predicting its service life before decommissioning is essential to guide the use and maintenance of the uniform. The aim of this study is to introduce a model to predict the tensile strength of flame-retardant fabrics under fire exposure. The thermal degradation and microstructure of Kevlar/polybenzimidazole and polyimide/Kevlar fabrics were investigated. The decrease of tensile strength was attributed to the chemical changes and the development of microstructure cracks and charring of the fibers. Multiple linear regression (MLR) and artificial neural network (ANN) models were established to predict the tensile strength after thermal aging. The ANN model presented a better prediction result ( R 2  = 0.88, root mean square error (RMSE) = 96.91) than the MLR method ( R 2  = 0.76, RMSE = 138.61). The addition of fabric backside temperature ( T), glass transition temperature ( T g ), and degradation temperature ( T d ) further increased the R 2 (4%) and decreased the RMSE (14.99) of the ANN model, which was recommended as a prediction approach with better accuracy. The findings of this study will contribute to estimating the continuous performance of firefighting clothing.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    RVK:
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2209596-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    In: Textile Research Journal, SAGE Publications
    Abstract: The thermal degradation of flame-resistant fabrics reduces the protective ability of clothing and affects firefighters’ safety. Making clear the influence factors of fabric thermal degradation is important for predicting and prolonging the service life of fire-protection clothing. Experiments were conducted for open and sealed air gaps with different thicknesses under flame exposure. The degradation the of outer shell fabric was evaluated by observing the variation in fabric morphology, mass loss and tensile strength of specimens after heat exposure. The influence mechanism of the type and thickness of the air gap on thermal degradation was analyzed by the surface temperature curve and thermal stability of the fabric, as well as the microstructure of the fiber. The results indicated that the type and thickness of the air gap have a significant effect on thermal degradation, and a more serious negative effect was observed under the condition of an open air gap. After being exposed to heat fluxes of 30 and 50 kW/m 2 for 40 s, the mass loss rates were 1.8% and 3.3% higher than those of the sealed air gap, and the tensile strength retention rates were 9.1% and 10.1% lower on average, respectively. Air gap type and thickness affected the heat storage and heat transfer efficiency in the fabric system by changing the heat transfer mode. The decomposition and fracture of the fabric were affected, which made the flame-resistant fabrics show different degrees of thermal degradation.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    RVK:
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2209596-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...