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Effects of Rolling Process on Mechanical Properties and Formability of Reinforced Polymeric Matrix with Stainless Steel Mesh as Cladding Composite Sheet

Aminoon, Mohadeseh | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54517 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Akbarzadeh, Abbas
  7. Abstract:
  8. In this study, the mechanical properties of composite sheet polymer matrix reinforced with steel mesh were investigated. This bonding was carried out by rolling of a three layers of steel mesh in between two composite polymer sheets. Then, the effective parameters of process; Sample maintenance temperature inside the furnace, reduction during rolling, rolling speed, rolling direction and Number of rolling passes were investigated to determine the optimized processing conditions. In this way, adding mesh to the polymeric matrix improves the strength and polymer / polymer bond in the sandwich structure. Placing the mesh in the sandwich structure converts the brittle behavior of the polymeric composite into a soft behavior. The sandwich structure with 14 mesh has lower strength compared to the sandwich structure with 8 mesh, which is due to the high amount of wires and nodes of 14 mesh compared to 8 mesh, and these points increase the concentration of stress and geometric distortion. On the other, increasing the temperature reduces the viscosity and consequently increases the flow rate of the polymer melt. Therefore, during rolling, the penetration of molten polymer into the openings of mesh is facilitated and ultimately improves the tensile and flexural strength of the sandwich structure. Increasing the reduction due to the increase of force on the laminate during rolling and as a result of the high pressure of the polymer melt entering the pores between the wires at the nodes, improves the joints and the tensile and flexural strength of the sandwich structure. According to the investigation of damage due to impact during the drop weight impact test, the sandwich structure with 14 mesh has penetration and the sandwich structure with 8 mesh suffers delamination. Because in the sandwich structure with 14 mesh, the number of connections is more than the sandwich structure with 8 mesh
  9. Keywords:
  10. Steel Mesh ; Mechanical Properties ; Formability ; Polymer Matrix Composite ; Stainless Steel Mesh ; Sandwich Composite Sheets

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