Empirical Analysis of Fracture in Polymeric Unidirectional Composites With mechanical connections

Document Type : Original Article

Authors

1 Maut

2 Department of Mechanical Engineering, Islamic Azad University, Hamedan Branch,

3 Assistant Professor, Department of Mechanical Engineering, Malik Ashtar University of Technology, Isfahan

4 Instructor of Males' No. 1 Technical and Vocational University (Shahid Mofatteh Hamedan)

Abstract

Composites are a class of advanced materials in which simple material combinations are used to create new materials with superior mechanical and physical properties. The use of composites in vessels has several advantages such as weight loss, improvement of radar and magnetic properties, resistance to chemical corrosion and mechanical corrosion and fatigue, vibration absorption and noise, high strength-to-weight ratio, good resistance to underwater shocks. Replacing steel components with composite components can save 60 to 80 percent on component weight and 20 to 50 percent weight savings by replacing aluminum and composite components. In this study, the pin joints used in marine composite equipment were investigated in multilayer monodirectional composite made of glass and epoxy fibers. For this purpose, a model was considered for the problem and the parameters of the center of the pin from the free edge of the multilayer to the pin diameter (w/d) and the ratio of multilayer width to pin diameter (e/d) were defined as the variables of the problem. Then, to obtain the rupture force and rupture mode, the samples were subjected to tensile loading. The results showed that the maximum force tolerance and rupture mode were significantly affected by w/d and e/d parameters and with increasing the w/d ratio, the force tolerant increased and the mode of the rupture changed from shear to the mode of shear to the crush mode, and for each e/d ratio, there is an optimal limit for w/d.

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References

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