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Influence of interfacial strength on fracture process and mechanical properties of fiber composites

SUN Lili, JIA Yuxi, SUN Sheng, MA Fengde   

  1. School of Materials Science and Engineering, Shandong University, Jinan 250061, China
  • Received:2009-01-13 Revised:1900-01-01 Online:2009-04-16 Published:2009-04-16

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Abstract:

The interface is one of the key components of composite materials, which plays an important role in the fracture process and mechanical properties. In the current work, glass fiber surfaces were treated via the selfassembly monolayer method. The fracture process and mechanical properties of composites with different interfacial strength were investigated by a homemade tensile tester with an additional polarizing microscope. The results showed that in the case of a strong interface between the reinforcing fiber and matrix, the composites fracture in brittle mode, whereas in the case of a weak interface, the composites fracture in ductile mode. Furthermore, the reinforcing efficiency of the composite is related to the interfacial strength.

Key words: composites, glass fiber, epoxy, interface, mechanical properties

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  • TB1
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