Degradation in compressive strength of silica/phenolic composites subjected to thermal and mechanical loading

Abstract

Reduction to the mechanical properties of fiber-reinforced polymer composites occurs when the material is exposed to radiant heat flux and compressive loading. A thermo-mechanical model was developed to predict the compressive strength and the failure time of silica fiber-reinforced phenolic composites. The coupling heat and mass transfer processes, generation of pyrolysis gases, and their subsequent diffusion process were considered in the model. The thermal softening, thermal decomposition of the matrix material, and phase transition of the reinforced fibers, which reduce the strength of the material, were also taken into account in the formulation of the model. Pyrolysis kinetics of phenolic resin, volume fraction of phase component, temperature profile, compressive strength, and time-to-failure of silica/ phenolic composites were predicted using the developed model. The calculated temperature-dependent strength curve was compared with the experimental results measured by a high-temperature compression testing, and the agreement is good. The material fracture morphology was analyzed for silica-phenolic composite specimen after high-temperature compression testing.

Influence of treatments on the mechanical and thermal properties of sugar palm fibre reinforced phenolic composites

“…This result was possibly because of the high Si content in the untreated vs. treated composites (Rashid et al 2016a). The surface treatments partially removed the outer surface, which was rich in Si content and complex chemical structures, and contributed to the thermal stability of the composites (Luo et al 2015;Shi et al 2016).…”

Effect of Filler-Filler Interactions on Mechanical Properties of Phenol Formaldehyde Based Hybrid Composites

“…Submitted: 2017-07-24 ISSN: 2297-623X, Vol. 13, pp [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] Revised: 2017-09-20 doi:10.56431/p-9eneip…”

Study of the Fracture Behavior under the Effect of Cross-ply and Angle-ply Arrangement of FRP Composite Laminate Subjected to Central Circular Cut-out with Mechanical and Thermal Loading Conditions

“…Fracture toughness of any material would play an important role in offering considerable resistance to cracks. Shi et al [11] developed a method to predict the compressive strength and failure of the silica fiber-reinforced phenolic composites under thermo-mechanical loading. They got results with good agreement between the experimental measured strength values and curve obtained by calculated values.…”