Failure behavior of resorcinol–formaldehyde latex coated aramid short‐fiber‐reinforced rubber sealing under transverse tension

Abstract

Composites composed of rubber, sepiolite fiber, and resorcinol-formaldehyde latex-coated aramid short fibers were prepared. Mechanical and morphological characterizations were carried out. To investigate the effect of interfacial debonding on the failure behavior of short-fiber-reinforced rubber composites, a micromechanical representative volume element model for the composites was developed. The cohesive zone model was used to analyze the interfacial failure. We found that computational results were in good agreement with the experimental results when the interfacial fracture energy was 1 J/m 2 and the interfacial strength was 10MPa. A parametrical study on the interface and interphase of the composite was conducted. The results indicate that a good interfacial strength and a choice of interphase modulus between 40 and 50 MPa enhanced the ductile behavior and strength of the composite. The ductile properties of the composite also increased with increasing interfacial fracture energy.

Interphase effect on the interfacial debonding behavior in short-fiber-reinforced rubber composites

“…The material properties and dimension of fiber, interphase and rubber matrix used in the calculation of stress profile by analytical model is shown in Table 1. The interfacial shear strength between fiber and interphase is assumed to 8MPa [2]. On the basis of equation (11), the critical strain of interfacial debonding is 8.08%.…”

“…Interphase, or interfacial zone, in fiber-reinforced composite materials is the thin layers between the fiber and the matrix. Although small in thickness, interphase can significantly affect the overall mechanical properties of the fiber or particle reinforced composites [2]. For example, a stiff interphase can transfer stress much more rapidly than a soft interphase [3].…”

Effect of Gear Pump Extrusion Processing on the Properties of Fiber Reinforced Rubber Composites

“…Many methods were found to improve the interaction between fiber and rubber for these differences. The bonding reaction between the rubber and the fiber was mainly carried out by a chemical method, thereby enhancing the adhesion between the short fibers and the rubber molecules [11]. This is a common method to enhance the adhesion behavior between rubber and short fiber interface by chemical modification [12].…”

“…The processing of short fiber reinforced rubber composite is significantly important, which may receive a better dispersion of fibers, a high aspect ratio during processing and controlling the orientation 2 of 14 in the desired direction for application [13]. There have been many researches on the processing technology of short fiber rubber composite [14][15][16][17][18]. Hintze et al [1] studied the influence of different processing conditions and fiber contents on the resulting morphology and macroscopic properties.…”

Numerical Calculation of Energy Between the Sealing Materials and Sepiolite Crystal on the Different Directions

“…Although there are a lot of from micro mechanics, mechanics of interface, the Nitrile Rubber (Nitrile-Butadiene Rubber, NBR) as the matrix, in a variety of Short Fiber to enhance body of Short Fiber Reinforced composite material (Short -Fiber -Reinforced Composites, SFRC) is analyzed with mechanics, numerical simulation, etc. [1], but many mechanics coefficient of interface are mostly through some mechanics model set, did not reach the interface combination between the essence of the problem [2].…”