Crack growth mechanism of natural rubber under fatigue loading studied by a real-time crack tip morphology monitoring method

Hong, Yang; Chang, Aijun; Fu, Kun; Liu, Yanpeng; Chen, Zhong‐Ren

doi:10.1039/c4ra06518b

Cited by 29 publications

(27 citation statements)

References 22 publications

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“…60 In brief, a Metravib DMA+1000 dynamic mechanical analysis (DMA) system was used to perform the crack growth test. 60 In brief, a Metravib DMA+1000 dynamic mechanical analysis (DMA) system was used to perform the crack growth test.…”

Section: Characterizationmentioning

confidence: 99%

Toughening rubbers with a hybrid filler network of graphene and carbon nanotubes

et al. 2015

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Unfilled rubbers usually show poor mechanical properties. Here, we demonstrate toughening natural rubber (NR) by designing a compact hybrid filler network composed of graphene (GE) and carbon nanotubes (CNTs). The physical interactions in this network have a bond energy lower than covalent bonds; and thus they preferentially break upon deformation and serve as sacrificial bonds that dissipate energy before failure of the materials. The high energy dissipation of the hybrid filler network not only increases the fracture toughness and tensile strength, but also suppresses the crack growth of the NR/ GE/CNT nanocomposites. These properties will provide the nanocomposites with better sustainability during practical applications.

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Section: Characterizationmentioning

confidence: 99%

Toughening rubbers with a hybrid filler network of graphene and carbon nanotubes

et al. 2015

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“…The higher energy consumption during cyclic loading is also demonstrated and reflected by the crack‐tip morphology monitoring. According to our previous study, there are two kinds of cracking morphologies observed for NR, that is, ligament break‐up morphology which needs less energy input; and surface peeling morphology which consume more energy. In this work, we also conducted the crack‐tip morphology monitoring by the crack growth test system.…”

Section: Resultsmentioning

confidence: 97%

Crack resistance improvement of rubber blend by a filler network of graphene

Zhou

Wang

Cao

et al. 2019

J of Applied Polymer Sci

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Crack resistance of rubbers is of vital importance in many applications (e.g., tire and shock absorber). In this work, we demonstrate the crack resistance improvement and toughening of natural rubber-solution polymerized butadiene styrene rubber (NR-SSBR) blend by designing a filler network composed of graphene (GE). The well-dispersed GE nanosheets contact with each other and bridge the adjacent GE nanosheets based on the π-π conjugation interaction, which preferentially break upon deformation and dissipate energy before the failure of the materials. The mechanisms of energy dissipation under small and large strains were further discussed. The approach of crack-tip morphology monitoring was also applied to understand the crack resistance behavior of the rubber material. The GE network and its energy dissipation not only increase the tensile strength and toughness, but also enhance the crack resistance of the NR-SSBR by expanding the tear energy region of high cracking energy dissipation. Improvement on these properties will provide the rubber blend with better long-term sustainability in practical applications.

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“…48 Certainly, heat build-up should be ignored for quasistatic fracture. Based on the theory proposed by Persson et al, 45 an expression which described the relationship between J″ and tearing energy G (ν) at a certain crack growth rate ν was proposed and presented in Equation (6). As a typical example, values of HED and H (%) under strain of 50% are shown in Table 5.…”

Section: Hysteresis Lossmentioning

confidence: 99%

Preparation, fracture, and fatigue of exfoliated graphene oxide/natural rubber composites

et al. 2015

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ARTICLE This journal isExfoliated graphene oxide (GO) reinforced natural rubber (NR) composites were prepared by a simple and promising latex co-coagulation method. Latex co-coagulation realized the complete exfoliation and uniform dispersion of GO in NR matrix. The quasi-static fracture and dynamic fatigue behaviors of composites were investigated. Mechanical properties and J-testing were used to characterize the fracture resistance, and fatigue tests were carried out under cyclic condition of constant strains. Results revealed that with increase in GO sheet content, the mechanical properties, fracture initiation and propagation resistance were all highly improved. A much higher reinforcing efficiency of GO sheets than that of traditional fillers was realized. Fatigue crack growth resistance was remarkably enhanced with the incorporation of only 1 phr GO sheets. The relatively weak fatigue resistance of composites filled with 3 phr and 5 phr GO was attributed to their high hysteresis loss and tearing energy input. It revealed that GO sheets would be promising filler in preparation of rubber composites with high fracture and fatigue resistance at low filler content.

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Crack growth mechanism of natural rubber under fatigue loading studied by a real-time crack tip morphology monitoring method

Abstract: Tear energy dependence of NR crack tip morphology.

Cited by 29 publications

References 22 publications

Toughening rubbers with a hybrid filler network of graphene and carbon nanotubes

Toughening rubbers with a hybrid filler network of graphene and carbon nanotubes

Crack resistance improvement of rubber blend by a filler network of graphene

Preparation, fracture, and fatigue of exfoliated graphene oxide/natural rubber composites

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