Mechanical properties and reinforcement mechanisms of hydrogenated acrylonitrile butadiene rubber composites containing fibrillar silicate nanofibers and short aramid microfibers

Polymer Engineering & Sci

2017

This article presents an experimental and numerical study of short-fiber-reinforced rubber sealing composites (SFRC) at different stress amplitudes (1 MPa, 2 MPa, and 3 MPa). The curves of the maximum strain varying with the number of cycles were obtained by the fatigue test, and the damage modes of SFRC at different stress amplitudes were determined by scanning electron microscope. A finite element model (FEM) was established, where fibers distributed randomly and the stress-based fatigue damage model integrating with a bilinear tractionseparation law of the cohesive zone model was embedded in the fiber/matrix interface. The effect of different stress amplitudes on the fatigue damage of SFRC was investigated by FEM where the interfacial debonding behavior was considered. The predictions at stress amplitudes of 1 MPa are generally consistent with experimental data. The predictions at high stress amplitudes (2 MPa and 3 MPa) are agreeable with experimental data at low number of cycles.

“…The samples were prepared by a molding process that was similar to that of the traditional rubber composites , as shown in Fig. .…”

Section: Methodsmentioning

confidence: 99%

Modeling and experimental validation of interfacial fatigue damage in fiber‐reinforced rubber composites

Polymer Engineering & Sci

2017

“…The samples were prepared by a molding process that was similar to that of the traditional rubber based composites , as shown in Fig. .…”

Section: Methodsmentioning

confidence: 99%

Micromechanical modeling of large deformation in sepiolite reinforced rubber sealing composites under transverse tension

2015

Polymer Composites

This article presents an experimental and numerical study on mechanical behavior of sepiolite reinforced rubber sealing composites (SRRC), which are subjected to the transverse tensile loads. A finite element model of composites with fibers in square and random distribution is adopted for the numerical study. The representative volume elements with different fiber volume fraction are established and analyzed. A successive remeshing strategy is employed to achieve the large deformation of SRRC. The results show that the tensile strength and breaking elongation of SRRC can be improved by addition of sepiolite fiber, and they reach a maximum at 42% fiber volume fraction. The stress‐strain curve of SRRC with fibers in the random distribution agrees well with that measured in the experiments. However, there exists a significant difference between experimental and numerical results as fiber volume fraction increases. POLYM. COMPOS., 38:381–388, 2017. © 2015 Society of Plastics Engineers

“…The sample were prepared through a molding process that was similar to that of traditional rubber‐based composites, as shown in Figure . The plastication was carried out with a mill mixer (XK160–320) to improve the plasticity of raw rubber.…”

Section: Methodsmentioning

confidence: 99%

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

J of Applied Polymer Sci

2014

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.