Research on the Influence of Humidity on the Manufacture of GFRP Vessels in the Equatorial

Abstract:

The objective of this research work is to analyze the behavior between fiberglass laminate under tensile tests, assembled under different humidity conditions. For which specimens were designed under the regime of the international standard ASTM D3039; which took an assembly process within a controlled environment; the design variables used were relative humidity and curing time. Subsequently, the traction-displacement behavior was checked under a uniaxial force, obtaining the maximum take-off force. In addition, Simpson numerical integration was applied to calculate elastic energy. Obtaining that the relative humidity and the days of curing influence the chemical and mechanical properties of the material. Se shows that the percentage of humidity recommended for assembling laminates in GRP is 66% since it has greater elastic energy and take-off force. Finally, it is concluded that to have a high resistance in the material at least 7 days of curing of the epoxy resin must be applied.

• Periodical: Defect and Diffusion Forum (Volume 432)
• Pages: 69-74
• DOI: https://doi.org/10.4028/p-22Wfse
• Online since: March 2024
• Authors: Patrick Roger Townsend Valencia*, Cinthya Astudillo, Karla Larrea, Juan Carlos Suárez
• Keywords: Curing Days, Elastic Energy, Fiberglass, Relative Humidity, Traction

References

[1] Suárez Reyes, J. G. (2018). Technical study to industrialize fiberglass boats in the Zambrano Océano Fibra workshop, located in the Anconcito parish, province of Santa Elena (Bachelor's thesis, La Libertad: Universidad Estatal Península de Santa Elena, 2018).

DOI: 10.18273/revbol.v40n1-2018002

[2] Orellana, J. M. (2016). Numerical and experimental analysis of cross-sectional cracking in symmetrical cross-laminates. Málaga.

[3] Luna, J. M. (2014). Numerical study of the propagation of cracks in rotating axes by means of XFEM.

[4] Iglesias, M., Lesa, A. I., Pérez, C., Mosca, D., & Raimonda, P. (2017). Fiberglass reinforced plastic: A versatile material forgotten in Uruguay. INNOTEC Gestión, (8 ene-dic), 56-60.

[5] Pérez Alonso, C. (2016). Naval Composites: Composite materials and the shipbuilding industry (Bachelor's thesis, University Politecnica of Catalunya).

[6] Majewska, K., Jurek, M., Mieloszyk, M., & Ostachowicz, W. (2018). Temperature and humidity influence on glass fibre reinforced polymer samples under ndt and shm studies. In Proceedings of 7th Asia-Pacific Workshop on Structural Health Monitoring (pp.172-183).

DOI: 10.12783/shm2019/32418

[7] Sun, C. T., & Jin, Z. (2011). Fracture mechanics. Academic press.

[8] ASTM D3039/D3039M‐17. Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials; D3039M‐17; ASTM International: West Conshohocken, USA, 2017.

[9] Shimadzu. (s. f.). Precisión Universal Tester Autograph AGS-X Series. Shimadzu. https://www.ssi.shimadzu.com/products/materials-testing/uni-ttm/autograph-ags-x-series/ind ex.html