Experimental research on mechanical behavior of 3-D braided composite materials
- Nanjing Univ. of Aeronautics and Astronautics (China)
As a kind of advanced composite materials, 3-D braided composites have superior delamination resistance and impact tolerance. In this paper 4-step 3 x 2 braiding composite specimens were formed by means of RTM (resin transfer moulding) technique with vacuum assisted. A measurement was taken by means of experiment on the tensile properties of 3-D braided uncut, cut and drilled composite specimens. The effect of cut fibers on the tensile strain of specimen edge was compared with that of uncut fibers. The stress concentration coefficient around hole was measured. The factors affecting tensile properties of 4-step composites and the reasons for failure were discussed. The results showed that with the braider angle increased, the tensile modulus and strength decreased. The tensile properties of cut and drilled specimens were inferior to those of uncut specimens. The stress concentration coefficient around hole of 4-step composite materials was lower than that of laminates and metals. The tensile failure of 3-D braided composites appeared to be a result of fibre breakage with some evidence of fibre pull-out.
- OSTI ID:
- 412090
- Report Number(s):
- CONF-960310-; TRN: 96:005072-0055
- Resource Relation:
- Conference: 41. international symposium of the Society for the Advancement of Material and Process Engineering and exhibition: materials and processes challenges - aging systems, affordability, alternative applications, Anaheim, CA (United States), 25-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Society for the advancement of material and process engineering. 41st International SAMPE symposium and exhibition, Volume 41, Books 1 and 2; PB: 1844 p.
- Country of Publication:
- United States
- Language:
- English
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