Aging-impact coupling based analysis upon glass/polyester composite material in hygrothermal environment

• Published in: Materials in engineering 2011-08, Vol.32 (7), p.4080-4087
• Main Authors: Boukhoulda, F.B., Guillaumat, L., Lataillade, J.L., Adda-Bedia, E., Lousdad, A.
• Format: Article
• Language: English
• Subjects: Climatic chambers; Composite materials; Contact; Deflection; Fiber composites; Joining; Low energy; Polyester resins; Relative humidity
• ISSN: 0261-3069
• DOI: 10.1016/j.matdes.2011.03.009

► We confirmed the Langmuir’s behaviour governing the absorption of water by the material. ► The hygrothermal aging leads to a decrease in the impact force. ► The hygrothermal aging leads to an increase in plate deflection and the contact duration. ► The zone of delamination is reduced when the material is aged. ► In the hygrothermal environment, increased flexibility of the material is observed. The objective of this present paper is an investigation of aging-impact coupling upon the polyester matrix E-glass fibers composite materials in hygrothermal environment. In the first part of the study, laminate composite plates were aged in an artificial hygrothermal environment using a climatic chamber at 50 °C temperature and 95% of relative humidity. The gravimetric readings showed discrepancy with respect to Fick’s law which indicates the non-Fickian character of the moisture absorption kinetics. The application of the Carter–Kibler’s model confirmed the Langmuir’s behaviour governing the absorption up to a lap time. In the second part of the study, low energy impacts test were carried out on both aged and non-aged composite plates in a bending configuration on two metallic supports. The impact loads were applied using drop-mass tower. The mechanical responses of aged and non-aged plates such as impact force, bending, contact duration, energy dissipation and damage are highlighted and analyzed.