Time to failure prediction in rubber components subjected to thermal ageing: A combined approach based upon the intrinsic defect concept and the fracture mechanics

Hassine, M. Ben; Naït-Abdelaziz, Moussa; Zaïri, Fahmi; Colin, Xavier; Tourcher, Christophe; Marque, G.

doi:10.1016/j.mechmat.2014.07.015

Cited by 34 publications

(34 citation statements)

References 41 publications

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“…The deterioration of the mechanical properties of polymers due to ageing is now a phenomenon which has attracted the attention of many investigators. Indeed, ageing strongly modify either the mechanical behaviour or the fracture properties . Especially, oxidation plays an important role in the modification of the chemical structure and provokes macromolecular chain scissions and crosslinking .…”

Section: Application To Thermal Ageingmentioning

confidence: 99%

“…In what follows, we will just remind the main steps of the methodology. More details can be found in a previous work …”

Section: Application To Thermal Ageingmentioning

confidence: 99%

“…Indeed, ageing strongly modify either the mechanical behaviour 45 or the fracture properties. 6,[46][47][48] Especially, oxidation plays an important role in the modification of the chemical structure and provokes macromolecular chain scissions and crosslinking. [48][49][50] For us to investigate the long-term ageing effects, thermal ageing tests allowing the specimen exposure to predefined temperatures are commonly used to accelerate the oxidation process and therefore to shorten the tests duration.…”

Section: A P P L I C a T I O N T O T H E R M A L A G E I N Gmentioning

confidence: 99%

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A large‐strain intrinsic default‐based fracture criterion for polymers: assessment in biaxial loading and application to ageing

Sadeg

Naït-Abdelaziz

Zaïri

et al. 2017

Fatigue Fract Eng Mat Struct

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In this contribution, we attempt to give a general methodology allowing the fracture prediction of polymers under biaxial monotonic loading. Using the intrinsic defect concept, we assume that fracture at a macroscopic level is the consequence of the presence of defects at lower scales. We also assume that the fracture is governed by a macroscopic parameter, the strain energy release rate or the J‐integral. Intrinsic defect size, constitutive response and fracture toughness being the criterion inputs; the principal stretches at break can be therefore estimated for any biaxial and monotonic loading path. The proposed methodology includes the estimation of the J‐integral for any biaxial loading using a unified expression of this parameter which is a generalised form of that developed in the literature for uniaxial tension. Using different set of experimental data obtained in our team, the methodology is then successfully applied to various kinds of polymers: a natural rubber, a styrene‐butadiene rubber, a polyurethane, a thermoplastic elastomer and a high‐density polyethylene. We show also that such a methodology can be applied to predict the ageing effects on the stretches at break.

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Section: Application To Thermal Ageingmentioning

confidence: 99%

“…In what follows, we will just remind the main steps of the methodology. More details can be found in a previous work …”

Section: Application To Thermal Ageingmentioning

confidence: 99%

Section: A P P L I C a T I O N T O T H E R M A L A G E I N Gmentioning

confidence: 99%

See 1 more Smart Citation

A large‐strain intrinsic default‐based fracture criterion for polymers: assessment in biaxial loading and application to ageing

Sadeg

Naït-Abdelaziz

Zaïri

et al. 2017

Fatigue Fract Eng Mat Struct

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“…The mechanical and ultimate properties of elastomers are strongly dependent on the loading condition history and on the chemical and physical aging exposure history. Those properties are directly influenced by the changes in the macromolecular network structure induced by a chemical re- ( Delor-Jestin, 1996;Shabani, 2013 ), whereas post-crosslinking is largely favored when they are vulcanized with sulfur due to maturation phenomena ( Ben Hassine et al, 2014;Delor-Jestin, 1996 ). However, maturation can be totally supplanted by reversion phenomena when increasing the temperature ( Bevilacqua, 1962;Colin et al, 2007b;Shelton, 1957 ).…”

Section: Introductionmentioning

confidence: 99%

New developments in fracture of rubbers: Predictive tools and influence of thermal aging

Naït-Abdelaziz

Ayoub

Colin

et al. 2019

International Journal of Solids and Structures

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In this work, the influence of thermal oxidative aging on the ultimate mechanical properties of rubbers is investigated. Two new approaches to predict failure properties are proposed. The first one is the stress limiter approach that uses a "damage" parameter allowing determination of the failure stress and strain of an aged material knowing both the mechanical properties and macromolecular network characteristics of an as-received material. The second one is an extension of the energy limiter approach that suggests capturing the drop of the stress at failure by replacing the strain energy density function of an as-received elastomeric material by a function expressed in terms of an energy limiter. The predictive capabilities of these two approaches are validated using experimental results for two elastomeric materials: an EPDM and a polychloroprene (CR), both of which exhibit a largely predominant post-crosslinking (over chain scissions) during aging. Comparison between the predictions and the experimental results in terms of failure stresses and strains under uniaxial tension showed a good agreement. Consequently, these two approaches are promising tools for designing elastomeric parts subjected to thermal oxidative aging.

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“…In previous works [15][16][17][18][19][20][21][22][23][24], we reported that polymers and composites [16][17][18][19][20]22,23,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] can be degraded by several aging agents such as heat, water, humidity, oxygen, ozone and various other environments factors [16][17][18][19][20][21][22][23][24]. The scission, crosslinking and plasticization of polymer networks may occur and led to severe deterioration of the mechanical and physicochemical properties of the material [42], which are quite important with regard their applications in various fields of mechanical engineering.…”

Section: Introductionmentioning

confidence: 99%

Butyl Rubber-Based Composite: Thermal Degradation and Prediction of Service Lifetime

2019

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Butyl rubber-based composite (BRC) is one of the most popular materials for the fabrication of protective gloves against chemical and mechanical risks. However, in many workplaces, such as metal manufacturing or automotive mechanical services, its mechanical hazards usually appear together with metalworking fluids (MWFs). The presence of these contaminants, particularly at high temperatures, could modify its properties due to the scission, the plasticization and the crosslinking of the polymer network and thus lead to severe modification of the mechanical and physicochemical properties of material. This work aims to determine the effect of temperature and a metalworking fluid on the mechanical behavior of butyl rubber composite, dealing with crosslinking density, cohesion forces and the elastic constant of BRC, based on Mooney–Rivlin’s theory. The effect of temperature with and without MWFs on the thermo-dynamical properties and morphology of butyl membranes was also investigated. The prediction of service lifetime was then evaluated from the extrapolation of the Arrhenius plot at different temperatures.

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Time to failure prediction in rubber components subjected to thermal ageing: A combined approach based upon the intrinsic defect concept and the fracture mechanics

Cited by 34 publications

References 41 publications

A large‐strain intrinsic default‐based fracture criterion for polymers: assessment in biaxial loading and application to ageing

A large‐strain intrinsic default‐based fracture criterion for polymers: assessment in biaxial loading and application to ageing

New developments in fracture of rubbers: Predictive tools and influence of thermal aging

Butyl Rubber-Based Composite: Thermal Degradation and Prediction of Service Lifetime

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