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Design a ship base using adhesively bonded hollow steel members to Reinforce Aluminum Plates

Design a ship base using adhesively bonded hollow steel members to Reinforce Aluminum Plates

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Design a ship base using adhesively bonded hollow steel members to Reinforce Aluminum Plates

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  1. United Arab Emirates University College of Engineering Mechanical Department Design a ship base using adhesively bonded hollow steel members to Reinforce Aluminum Plates Mohammed Jassem Al Hosani 200301436 Osama Ebrahim Al Zaabi 200305397 Ahmed Abdulla Al Owain 200204035 Jassem Mohammed Al Hosani 200200431 Advisor; Dr. Ahmed Alawar Co- Advisor; Dr. WaleedKhalil Ahmed

  2. Contents • Introduction • Methods & Techniques • Testing • Lower deck’s calculations • Results & Discussions • Testing results • Lower deck results • Finite element • Conclusions & Recommendations

  3. Introduction • project our aim is to find out the efficiency of reinforcing an aluminum plate by using adhesively bonded hollow steel sections for strengthening or rehabilitation of marine applications and to investigate the performance characteristics and failure mechanisms in comparison with similar welded fabricated sections. • This project will be prove that constructions of steel structures for the marine industry to be practicable using modern structural adhesives. These adhesively bonded structures are efficient form of paneling.

  4. Introduction • This project will include investigating the use of hollow steel and aluminum reinforced plates as materials. The metallic hollow members made of steel were usually welded to the reinforced plates. As a part of this investigation, these hollow members will be adhered to the plates rather than welded and then will be compared to the welding results. In addition, an experimental optimization process will be done to determine the required area for the adhesive interface to sustain the load as per the design. Finite element software might be needed to analyze and compare the date.

  5. Introduction • The objective of this project is to find out the efficiency of reinforcing aluminum plate by using adhesively bonded hollow sections to compare with similar welded fabricated sections. Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This type of operation is used widely in ship manufacturing. Adhesive method is a new technology that used in the ship manufacturing so that we use a special type of resin to manufacture the lower deck of the ship. The group will handle a complete design problem that involves; • Design calculations • Experimental work • Data analysis in addition to finite element modeling

  6. Methods & Techniques • Testing • Bonding the specimens Epoxy and Hardener

  7. Methods & Techniques • Testing • Bonding the specimens Mixing the epoxy and hardener until homogeneously occurs

  8. Methods & Techniques • Testing • Bonding the specimens Cleaner

  9. Methods & Techniques • Testing • Bonding the specimens Bond the specimens

  10. Methods & Techniques • Testing • Experiment In order to run the testing, we follow these steps; 1-We did the testing using 9 specimens. The following tables represent combinations between the specimens by using the welding and bonding and the dimensions of each piece.

  11. Methods & Techniques • Testing • Experiment 2-Use block bearing to prevent making local buckling 3-Use strain indicator to indicate the strain.

  12. Methods & Techniques • Testing • Experiment 4-Use strain gage at the center of the rips and connected it to the strain indicator. 5-Start the testing. 6-Stop the Testing after 15 min loading.

  13. Methods & Techniques Lower deck’s calculations • Mass applied= 500 kg/m2 with a uniform load • Transverse beams are hollow steel beams; • General structural steel • Longitudinal beams are steel I beams; • General structural steel • Aluminum plate with thickness of 6mm; • AL-5083H112 • The distance between transverse beams is 30 cm

  14. Methods & Techniques Lower deck’s calculations • Calculate the number of rips needed; • Total force applied on each rip; • Maximum bending moment;

  15. Methods & Techniques Lower deck’s calculations • Modulus of elasticity for the composite; • Centroid of the composite;

  16. Methods & Techniques Lower deck’s calculations • The moment of inertia calculated as follow;

  17. Methods & Techniques Lower deck’s calculations • Finally, we calculate the allowable stress and the deflection of the transverse beams; the equation of section modulus is;

  18. Results & Discussions • Testing results • Experimental Results The steel/steel welded and the maximum deflection which it was 1.5 mm at load 4000N within the elastic rang.

  19. Results & Discussions • Testing results • Experimental Results The steel/steel adhered and the maximum deflection which it is 1.5 mm at load 6000N.

  20. Results & Discussions • Testing results • Experimental Results Thesteel/aluminum adhered and the maximum deflection which it was 1.5 mm at load 7000N

  21. Results & Discussions • Testing results • Finite Element Finite element results

  22. Results & Discussions • Testing results • Finite Element Average lap shear strength for typical metal to metal joints

  23. Results & Discussions • Testing results • Finite Element The distribution of stresses on the welded steel

  24. Results & Discussions • Testing results • Lower deck results Properties for the plate and transverse beam/rip

  25. Results & Discussions • Testing results • Lower deck results Number of rip and bending moment maximum deflection for transverse beams/rips

  26. Results & Discussions • Testing results • Lower deck results Centroid for the transverse beam

  27. Results & Discussions • Testing results • Lower deck results Moment of inertia for the composite

  28. Results & Discussions • Testing results • Lower deck results Allowable stress and the maximum deflection for transverse beams/rips

  29. Results & Discussions • Testing results • Lower deck results Section modulus for longitudinal I beam

  30. Results & Discussions • Testing results • Lower deck results Allowable stress and the maximum deflection for longitudinal I beams

  31. Results & Discussions • Testing results • Lower deck results Allowable stress and the maximum deflection for longitudinal I beams

  32. Results & Discussions • Testing results • Finite Element Boundary conditions and distributed load on the lower deck

  33. Results & Discussions • Testing results • Finite Element Deflection of the lower deck

  34. Results & Discussions • Testing results • Finite Element Strain on the lower deck

  35. Results & Discussions • Testing results • Finite Element Strain on adhesive layer