Investigation of Rib Effects on Strength in Polimer Part

Abstract

In this study, the effects of ribs on the stresses formed in the polymer part were investigated. The angles of 3 different ribs, 5 different rib heights, 5 different rib thicknesses, and the bottom radius of 5 different ribs were determined as the rib parameter. The strength analysis of the part designed with these values was made in Ansys software. With the designed rib, it was determined that the lowest stress was 31.49 MPa and the stress ratio of the part decreased by 10% at the pressure applied from the A surface. It was determined that the lowest stress was 26.3 MPa under the applied pressure from the B surface and the stress ratio of the part decreased by 25%. It was determined that the lowest stress was 28.21 MPa under the applied pressure from the C surface, and the stress ratio of the part decreased by 18%. It was determined that the lowest stress was 21.57 MPa and the stress ratio of the part decreased by 39% at the pressure applied from the D surface.

Keywords

• Polymer
• Rib
• Strength
• Ansys

Plastik Parçalarda Federin Gerilmeler Üzerindeki Etkilerinin Araştırılması

Öz

Bu çalışma, federlerin polimer parçada oluşan gerilmeler üzerine etkilerini incelenmiştir. Feder parametresi olarak birbirinden farklı 3 federin açısı, birbirinden farklı 5 feder yüksekliği, birbirinden farklı 5 feder kalınlığı, ve birbirinden farklı 5 federlerin dip yarıçapı belirlenmiştir. Bu değerlerle tasarımı yapılan parçanın mukavemet analizi Ansys yazılımında yapılmıştır. Tasarlanan feder ile A yüzeyinden uygulanan basınçta en düşük gerilme 31,49 MPa ve parçanın gerilme oranının %10 azaldığı tespit edildi. B yüzeyinden uygulanan basınçta en düşük gerilme 26.3 MPa ve parçanın gerilme oranının %25 azaldığı tespit edildi. C yüzeyinden uygulanan basınçta en düşük gerilme 28,21 MPa ve parçanın gerilme oranının %18 azaldığı tespit edildi. D yüzeyinden uygulanan basınçta en düşük gerilme 21,57 MPa ve parçanın gerilme oranının %39 azaldığı tespit edildi.

Anahtar Kelimeler

• Polimer
• Feder
• Gerilme
• Ansys

Kaynakça

1. [1] Guo W, Hua L, Mao H. Minimization of sink mark depth in injection-molded thermoplastic through design of experiments and genetic algorithm. The International Journal of Advanced Manufacturing Technology. 2014; 72(1-4):365-375.
2. [2] Erzurumlu T, Özcelik B. Minimization of warpage and sink index in injection-molded thermoplastic parts using Taguchi optimization method. Materials and Design. 2006;27(10): 853-861.
3. [3] Mathivanan D, Nouby M, Vidhya R. Minimization of sink mark defects in injection molding process-Taguchi approach. International Journal of Engineering Science and Technology. 2010; 2(2):13-22.
4. [4] James P, Krishna DM, Kotresh G, Varughese B. Finite element analysis of inter spare ribs of composite wing of light transport aircraft against brazier load. In National Conference on Scientific Achievements of SC and ST Scientists and Technologists. 2009, Bangalore:2009. 17.
5. [5] Salimi H, Noorabadi M, Eskandari JJ. Vibration Analysis of Composite Cylindrical Shell Reinforced with Circumferential Rib. Tabriz Journal of mechanic. 2016; 46(2):167-172.
6. [6] Lam YC, Santhikumar S. Automated rib location and optimization for plate structures. Structural and multidisciplinary optimization. 2003; 25(1):35-45.
7. [7] Manaf ARA, Zawawi MZ, Adly NZI. Thin Walled Part Warping Overcoming by Honeycomb Ribs Design. In Advanced Materials Research. 2014; 903:181-186.
8. [8] Lan T, Chiu MC, Yeh LJ. An Approach to Rib Design of Injection Molded Product Using Finite Element and Taguchi Method. Information Technology Journal, 2008;7(2): 299-305.

9. [9] Chung J, Lee K. Optimal design of rib structures using the topology optimization technique, Proceedings of the Institution of Mechanical Engineers. Journal of Mechanical Engineering Science. 1997; 211(6):425-437.
10. [10] Rostami LS, Akbari AR, Kolahdouz A. Effect of geometrical parameters of cylindrical composite grid structures in behavior buckling. Journal of Mechanical Engineering. 2015;8(3) 197-207.
11. [11] Khakzad F. Feder parametrelerinin plastik parça mukavemeti üzerindeki etkilerinin incelenmesi, Yüksek Lisans Tezi. Ankara: Gazi Üniversitesi; 2017.