Investigative studies on the critical prepreg variables influencing the functional performance of ablative composites for extreme environments in launch vehicles and re-entry missions

Kumar, Lav; Anandapadmanabhan, E.N.; Chakravarthy, P.

doi:10.1088/2053-1591/ab1ac7

Cited by 4 publications

(9 citation statements)

References 9 publications

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“…The reported density of standard silica phenolic (SP) composite, manufactured using silica fabric prepreg layers (impregnated with phenolic resin), lies in the range of 1.7–1.8 g/cm 3 . [ 1,6,48 ] The density of developed silica phenolic composite (SPMB0) with chopped silica fibers was observed to be 23% lower than the density of standard silica phenolic composite due to the reduced quantity of higher density silica fibers in SPMB composites (25 V%) compared to standard SP composite (40–50 V%). [ 6 ] The density of silica phenolic composite was further reduced with the addition of HGM, and SPMB30 composites showed 36% lower density than that of standard SP composite.…”

Section: Resultsmentioning

confidence: 99%

“…[ 1,6,48 ] The density of developed silica phenolic composite (SPMB0) with chopped silica fibers was observed to be 23% lower than the density of standard silica phenolic composite due to the reduced quantity of higher density silica fibers in SPMB composites (25 V%) compared to standard SP composite (40–50 V%). [ 6 ] The density of silica phenolic composite was further reduced with the addition of HGM, and SPMB30 composites showed 36% lower density than that of standard SP composite. A comparison of densities of SPMB composites with standard SP composites, as reported by Mohan et al [ 6 ] at different resin content levels, is shown in Figure 4A.…”

Section: Resultsmentioning

confidence: 99%

“…[ 6 ] The density of silica phenolic composite was further reduced with the addition of HGM, and SPMB30 composites showed 36% lower density than that of standard SP composite. A comparison of densities of SPMB composites with standard SP composites, as reported by Mohan et al [ 6 ] at different resin content levels, is shown in Figure 4A.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal diffusivity of the test specimen was evaluated using the formula (). [ 6 ]

α goodbreak= 0.1388 \frac{d^{2}}{t_{50}}

where α is the thermal diffusivity in cm 2 /s, d is the specimen thickness in cm and t 50 is half the time to reach T max in seconds.…”

Section: Methodsmentioning

confidence: 99%

“…The thermal conductivity of silica phenolic composites (0.4–0.6 W/mK) was lower than that of carbon phenolic composites (0.9–1.3 W/mK) while processing under identical conditions. [ 6 ] Silica phenolic composite also has a lower cost per volume than carbon phenolic ablative composites. These benefits give an advantage for silica phenolic composite over carbon phenolic in places where thermal insulation requirements are predominated over ablation requirements.…”

Section: Introductionmentioning

confidence: 99%

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Thermophysical properties of hybrid silica phenolic ablative composite: Theoretical and experimental analysis

Panigrahi

Sasikumar

et al. 2022

Polymer Composites

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Silica phenolic ablative composites are used in many high‐temperature applications like rocket/missile solid motor nozzles, space re‐entry vehicles, and so forth. As ablative composite with lower thermal conductivity and density can save considerable cost, a hybrid silica phenolic ablative composite was developed by establishing a novel processing methodology using chopped silica fiber, phenolic resin, and hollow glass microsphere. The thermophysical properties of the developed hybrid composite are analyzed and established the scientific know‐how. The developed composites, with 36% lower density, displayed 50% lower thermal conductivity and 50% lower thermal diffusivity than standard silica phenolic composite. Since a proper thermal conductivity model for a three‐component composite with matrix, fiber, and hollow glass microsphere is not available, the most suitable model for the developed composite is established.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The thermal diffusivity of the test specimen was evaluated using the formula (). [ 6 ]

α goodbreak= 0.1388 \frac{d^{2}}{t_{50}}

where α is the thermal diffusivity in cm 2 /s, d is the specimen thickness in cm and t 50 is half the time to reach T max in seconds.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermophysical properties of hybrid silica phenolic ablative composite: Theoretical and experimental analysis

Panigrahi

Sasikumar

et al. 2022

Polymer Composites

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Effect of cure temperature on the thermal degradation, mechanical, microstructural and moisture absorption behavior of vacuum‐only, carbon‐fiber reinforced phenolic composites

Zaldivar

Ferrelli

Arredondo

et al. 2022

J of Applied Polymer Sci

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Phenolic resin is the material of choice used for composite liners in solid rocket motor nozzles. We investigate the effect of the cure conditions (94, 116, and 155 C) on vacuum only (VO) processed composite mechanical, thermal, and microstructural changes. Although the T g 's correlated with the processing conditions, mechanical properties showed unexpected non-linear degradation after 94 C processing. This difference is primarily due to the lower cure state of the

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Ablative properties, thermal stability, and compressive behaviour of hybrid silica phenolic ablative composites.

Panigrahi

Sasikumar

et al. 2022

Polymer Degradation and Stability

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Investigative studies on the critical prepreg variables influencing the functional performance of ablative composites for extreme environments in launch vehicles and re-entry missions

Cited by 4 publications

References 9 publications

Thermophysical properties of hybrid silica phenolic ablative composite: Theoretical and experimental analysis

Thermophysical properties of hybrid silica phenolic ablative composite: Theoretical and experimental analysis

Effect of cure temperature on the thermal degradation, mechanical, microstructural and moisture absorption behavior of vacuum‐only, carbon‐fiber reinforced phenolic composites

Ablative properties, thermal stability, and compressive behaviour of hybrid silica phenolic ablative composites.

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