Mechanical Properties of Ramie Fiber Woven Composites under Biaxial Tensile Loadings

Abstract:

The objective of this work was to use a novel 3-D test analysis system for evaluating the mechanical properties of the natural fiber fabric composites under biaxial loads. Composites with three resin matrices (water-based epoxy resin, isocyanate resin, phenolic resin) were investigated, and strain filed were characterized by using the digital speckle correlation. The water-based epoxy resin plate and isocyanate resin plate demonstrated a characteristic of orthotropy and elastoplasticity, while the phenolic resin board revealed linear elastic and brittle-fracture simultaneously at X,Y-axial. Dissimilarities of biaxial load value were related to the orthotropy of composite structure, and load changes in fracture direction had a negative effect on the other directions at breaking moment. The degrees of dropping presented a positive correlation with the load values at rift direction. Under the linear elastic stage, the value of load and average strain at Y-direction were larger than that under X-direction within the same testing area. The strain-filed at X/Y-direction provided by isocyanate and phenolic resin plates illustrated a more smooth change than that of the water-based epoxy resin plate.

• Periodical: Advanced Materials Research (Volume 331)
• Pages: 65-68
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.331.65
• Online since: September 2011
• Authors: Ge Wang, Fu Ming Chen, Hai Tao Cheng, Zi Xuan Yu, Ze Hui Jiang, Xiao Meng Chen, Wen Fu Zhang
• Keywords: Biaxial Tension, Digital Spackle Correlation Method, Natural Fiber Fabric Composite, Ramie, Strain Filed

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