Research On The Forward Design And Properties Of Fiber Resin Composites

The fiber-reinforced composites used the fiber as reinforced phase and resin as matrix.Compared with the traditional metal materials,it had greater strength,better fatigue resistance,corrosion resistance and other advantages,especially with flexible design.In this paper,Hyper Mesh was used to establish the models of unidirectional fiber-reinforced composites,2D and 3D composites.By changing the fiber volume fraction,fiber type as well as the design of hybrid,hybrid-woven and hybrid-layer,the elastic properties of them were studied,and the plates of 2D woven fiber-reinforced composites were prepared.The main results were as follows:1.The effect of fiber volume fraction: with the increase of fiber volume fraction,the stress distribution of unidirectional fiber reinforced composites did not change obviously.The maximum stress was mainly distributed in the fiber at the interface,the minimum stress was distributed in the resin;the elastic modulus the shear modulus increased with the increase of fiber volume fraction,the finite element analysis results were consistent with the theoretical analysis results.2.The effect of fiber type: The properties of carbon,basalt,S2-glass and E-glass fiber-reinforced resin composites were studied.The maximum stress value of carbon fiber-reinforced composites was the largest,showing its better mechanical properties.The results showed that for the unidirectional fiber-reinforced composites,the elastic modulus in the fiber longitudinal direction: carbon > basalt > S2-glass > E-glass,the shear modulus: basalt > S2-glass > E-glass > carbon.For 2D and 3D composites,the elastic modulus in the longitudinal direction of the fiber bundle: carbon >basalt > S2-glass,the theoretical results were consistent with the finite element analysis results.3.Effect of hybrid,hybrid-woven and hybrid-layer: maximum stress value of hybrid,hybrid-woven and hybrid-layer carbon fiber-reinforced composites was the largest,indicating its better mechanical properties than others.For unidirectional composites,the elastic modulus in the fiber longitudinal direction: carbon > basalt + carbon > S2-glass + carbon > E-glass + carbon > Basalt > basalt + S2-glass > S2-glass > basalt + E-glass > E-glass + S2-glass > E-glass,that of carbon fiber-reinforced composites was 188.110 GPa,which was 28%,29% and 36% higher than that of basalt,S2-glass and E-glass fiber-reinforced composites,the shear modulus Gy z: basalt > S2-glass + basalt > S2-glass > basalt + E-glass > E-glass + S2-glass > carbon + basalt > S2-glass + carbon > E-glass > E-glass + carbon > carbon.For 2D composites,the elastic modulus in the longitudinal direction of the fiber bundle was: carbon > carbon + basalt > carbon + S2-glass > basalt > S2-glass > basalt + S2-glass,the composites formed by carbon fiber added to basalt fiber and S2-glass fiber,its elastic properties respectively increased 33.7% and 36.5%,loss of weight more than 50%.The results of the experiment were consistent with the finite element analysis.For 3D composites,when the fiber type in the longitudinal direction of fiber bundle was S2 glass fiber,the elastic modulus: S2-glass + carbon > S2-glass + basalt > S2-glass;when basalt fiber,the elastic modulus: basalt + carbon > basalt > basalt + S2-glass;when carbon fiber,the elastic modulus: carbon > carbon + basalt > carbon + S2-glass,the addition of carbon fiber could heighten the elastic modulus of basalt and S2-glass fiber-reinforced composites by 2.13 times and 2.23 times respectively.Through the research results above,there had a guiding and reference significance for the design and application of composites,it could be suitable for fiber-reinforced composites to design according to the actual needs and to reduce costs under the premise of meeting the requirements of mechanical properties.