The effect of material degradation on the bending of laminated plates

Document Type : Original Article

Authors

1 Faculty, Mechanical Engineering Department, Vali-e-Asr University of Rafsanjan

2 Assistant Professor, Department of Mechanical Engineering, Higher Education Complex of Bam, Bam, Iran.

Abstract

In the present study, the effect of material degradation in hygrothermal environment on the bending of laminated composite plates is investigated. Heat and humidity are environmental factors that affect the mechanical properties of polymers and therefore, behavior of laminated composites changes. For investigating these changes, a laminated composite is modeled through the Kirchhoff hypothesis and classical plate theory for thin plates, and the bending governing equations are derived. The resulted equation is solved for a simply supported laminated plate and exact solution is obtained for numerical analysis. The environmental effects on the mechanical properties are modeled using the available experimental results in the literature. Finally, the effects of laminate dimensions, temperature, relative humidity, fiber volume fraction, void volume fraction, lay-up on the maximum deflection of laminate is investigated in details. Results show that variation of temperature and relative humidity severely reduce the mechanical properties and affect the behavior of laminated plates.

Keywords

Main Subjects

References

  1. Mallick, P. K., "Fiber reinforced Composites, Materials, Design and Manufacturing", CR press, Book review (2007).
  2. Devine, F. E., "Polyester Moulding Materials in Automotive Underbonnet Environments", Composites, 14, No: 4, pp. 353-358, (1983).
  3. Belaid, S., Chabira, S. F., Balland, P., Sebba M., and Belhouideg S., "Thermal Aging Effect on the Mechanical Properties of Polyester Fiberglass Composites", Journal of Materials and Environmental Science, 6, No: 10, pp. 2795-2803, (2015).
  4. Gopalan, R., Somashekar B.R., and Dattaguru B., "Environmental Effects on Fiber Polymer Composites", Degradation and Stability, 24, No: 4, pp. 361-371, (1989).
  5. Chamis, C. C., "Simplified Composite mMicromechanics Equations for Hygral, Thermal and Mechanical Properties", NASA technical memorandum, in: Confernce of the Society of the Plastics Industry (SPI) Reinforced Plastics/Composites Inst. Hoston, USA (1983).
  6. Gillat, O., and Broutman, L. J., "Effect of an External Stress on Moisture Diffusion and Degradation in a Graphite-reinforced Epoxy Laminate”, in: Symposium on Advanced Composite Materials—Environmental Effects, ASTM STP, 658, USA (1977).
  7. Laura Svetlik S., "An Investigation in the Hygrothermal Degradation of an E- Glass/Vinyl-Ester Composite in Humid and Immersion Environments", Ph.D. Thesis. Structural EngineeringUC San Diego, (2008).
  8. Bittner T., Tej P., Bouska P., Vokac M., "Degradation of Laminated Glass as Result of Increased Temperature", Advanced Materials Research, 923, No: 2 , pp. 209-212, (2014).

9.       Zamani, M.H. and Heidari-Ranani M. "Analytical Progressive Damage Analysis of Laminated Composites Based on Various Material Degradation Models", The 6th International Conference on Composites Characterization, Fabrication and Application, Iran, (2018).

  1. Bouazza, , and Zenkour, A. M., "Hygrothermal Environmental Effect on Free Vibration of Laminated Plates Using nth-order Shear Deformation Theory", Waves in Random and Complex Media, Inpress, (2021).

11.   Singh, S. K., Chakrabarti A., "Hygrothermal Analysis of Laminated Composites Using C0 FE Model Based on Higher Order Zigzag Theory", Steel and Composite Structures, Vol. 23, No: 1, pp. 41-51, (2017).

12.   Jones, R., "Mechanics Of Composite Materials", CRC Press, (1998).

  1. Zenkour, A. M., Allam, M. N. M., and Radwan, A. F., "Effects of Hygrothermal Conditions on Cross-ply Laminated Plates Resting on Elastic Foundations", Archives of Civil and Mechanical Engineering, 14, No: 1, pp. 144–159, (2014).
  2. Shen, C. H., and Springer, G. S., "Moisture Absorbtion and Desorbtion of Composite Materials", Journal Composite Materials, 10, No: 1, pp. 2-20, (1967).
  3. Springer, G. S., "Environmental Effects on Epoxy Matrix Composites”, in: Procceding of Fifth Conference on Composite Materials,Testing and Design, pp 291-312, (1979).
  4. Allerd, R. E., and Lindrose, A., "The Room Temperature Moisture Kinetics of Kevlar 49 Fabric/Epoxy Laminates", in: Procceding of Fifth Conference on Composite Materials,Testing and Design, 313-323, (1979).
  5. Augl, J. M., and Trabocco, R., "Environmental Degradation Studies on Carbon Fiber Reinforced Epoxies", Presented at the “Workshop on Durability of Composite Materials, the Battelle Memorial Institue, Ohio, (1975).

 

 

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