Damage and fatigue life prediction of short fiber reinforced composites submitted to variable temperature loading: Application to Sheet Molding Compound composites

Tamboura, Sahbi; Laribi, Mohamed Amine; Fitoussi, Joseph; Shirinbayan, Mohammadali; Bi, Ruiyang; Tcharkhtchi, Abbas; Dali, H. Ben

doi:10.1016/j.ijfatigue.2020.105676

Cited by 14 publications

(9 citation statements)

References 32 publications

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“…Once validated, the approach is used to highlight the effect of types and order of the cyclic sequences. Note that a recent paper [20], the efficiency of the proposed method has also been demonstrated in the case of variable temperature. Therefore, a general algorithm involving both variable amplitude and temperature is proposed.…”

Section: T-b B-tmentioning

confidence: 83%

“…Three tests were carried out for each type of microstructure and type of sequence in order to demonstrate the reproducibility of the experimental results. Because of the high scattering microstructure well known in SMC composites, the microstructure of each specimen was firstly selected on the basis of ultrasonic measurements described in [19,20].…”

Section: Results and Validationmentioning

confidence: 99%

“…The micromechanical model [17] was originally proposed to predict S-N curves in the case of constant amplitude and temperature and variable microstructure. It was recently generalized in the case of variable temperature [20]. Moreover, the model can determine the evolution of the local damage rate,…”

Section: Hybrid Modelmentioning

confidence: 99%

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Modeling of Short Fiber Reinforced Polymer Composites Subjected to Multi‐block Loading

et al. 2021

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Short Fiber Reinforced Composite (SFRC) structures exhibit multiple microstructures (due to material flow during the process). They are generally subjected to variable amplitude loadings. In this context, a robust model is needed to predict fatigue life as a function of microstructure. In this paper, we propose a predictive micromechanical damage-based model allowing fatigue life prediction in the case of SFRC submitted to variable amplitude cyclic loading. An experimental study was firstly performed on Sheet Molding Compound (SMC) composite involving different microstructure configurations. Specimens were subjected to stress-controlled block loading. The influence of the order of the sequences was evaluated through Low-High amplitude (L-H) and High-Low amplitude (H-L) schemes. Damage accumulation is computed at the local scale to describe the evolution of the fibermatrix interface damage until failure. A local failure criterion based on a critical damage state allowed predicting variable amplitude fatigue life as a function of microstructure. A good correlation was found between experimental and numerical results. Once the approach was validated, it has been used to model different useful variable amplitude loading schemes to emphasize the role of the loading sequence parameters and order.

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Section: T-b B-tmentioning

confidence: 83%

Section: Results and Validationmentioning

confidence: 99%

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Modeling of Short Fiber Reinforced Polymer Composites Subjected to Multi‐block Loading

et al. 2021

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“…Several studies have been conducted concerning the mechanical behaviour of several SMC composites formulations [13,[21][22][23][24][25]. The focus has been on the multi-scale experimental analysis and modelling of the mechanical behaviour and damage of this class of composites materials [27,28]. It has been demonstrated that the non-linear behaviour of a standard SMC (such as the one in study) is mainly governed by fibre-matrix interface failure [21][22][23].…”

Section: Previous Workmentioning

confidence: 99%

Sheet Molding Compound Automotive Component Reliability Using a Micromechanical Damage Approach

et al. 2020

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The mastering of product reliability is essential for industrial competitiveness. If for metallic materials the topic is well-known, especially in automotive industry, Original Equipment Manufacturers are expecting strong support of their suppliers to full-fill the lack data. This paper presents a new original approach, using a micromechanical based on damage model to address the problem of reliability of Sheet Molding Compound (SMC) components. The first part demonstrates the inadequacy of the standard method of reliability on SMC material through its application on the new Peugeot 3008. In fact, the very flat S-N curve of SMC, and in general, composite materials is not appropriate for acceleration effect. The proposed model correlates the stress, damage and strength with both cycle number and slamming velocity. It emphasizes the relation between the effective distribution with the slamming velocity effect. Then, a new reliability approach based on a micromechanical fatigue/damage model was developed. The definition of new probability distributions based on damage was necessary to apply properly the stressresistance approach. It allows taking into account the velocity effect by switching in damage space. Finally, applying this new methodology on the Peugeot 3008, leads to the definition of the optimal validation laboratory tests to ensure the reliability. Indeed, the required number of cycles to ensure reliability has been reduced significantly. Micromechanical damage reliability approach could be an efficient way to ensure the reliability of short fiber reinforcement composite components used in industrial context.

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“…Jain et al presented a stress-number of cycles (S-N) curve that considered the effect of the stiffness drop according to the fiber orientation distribution during a fatigue test [19]. Tamboura et al investigated the damage and fatigue life prediction of short-fiber-reinforced composites [20]. Therefore, even in recent studies, fatigue life prediction by applying the degradation of the elastic modulus according to the stiffness reduction and damage of the composites were being made.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Prediction for Carbon-SMC and Carbon-FRP by Considering Elastic Modulus Degradation

Kim

Lim

et al. 2021

J. Compos. Sci.

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In the automotive industry, being lightweight has become an important design factor with the enhancement of environmental regulations. As a result, many studies on the application of composite materials are in progress. Among them, interest in carbon materials, such as carbon sheet molding compound (C-SMC) and carbon-fiber-reinforced plastic (CFRP), which have excellent strength and stiffness, is increasing. However, CFRP is a material that makes it difficult to secure economic feasibility due to its relatively high manufacturing costs and limited mass production, despite its excellent mechanical strength and durability. As a result, many studies have been conducted on C-SMC as an alternative carbon composite material that can be easily mass-produced. In this regard, this study intended to conduct a study on evaluating the fatigue strength of C-SMC and CFRP among mechanical properties due to the lack of clear failure criteria for fatigue design. We investigated the tensile and fatigue strengths of C-SMC and CFRP, respectively. In the case of C-SMC, the mechanical strength tests were conducted for two different width conditions to evaluate the cutting effect and the machining methods to assess the effects of the edge conditions. To evaluate the fatigue failure assessment criteria, the stiffness drop and elastic modulus degradation criteria were applied for each fatigue test result from the C-SMC and CFRP. The results confirmed that the rationality of the failure criteria in terms of the stiffness drop and the application of the fatigue life prediction of C-SMC based on elastic modulus degradation demonstrated promising results.

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Damage and fatigue life prediction of short fiber reinforced composites submitted to variable temperature loading: Application to Sheet Molding Compound composites

Cited by 14 publications

References 32 publications

Modeling of Short Fiber Reinforced Polymer Composites Subjected to Multi‐block Loading

Modeling of Short Fiber Reinforced Polymer Composites Subjected to Multi‐block Loading

Sheet Molding Compound Automotive Component Reliability Using a Micromechanical Damage Approach

Fatigue Life Prediction for Carbon-SMC and Carbon-FRP by Considering Elastic Modulus Degradation

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