Numerical modelling of thermal decomposition processes and associated damage in carbon fibre composites

Chippendale, Richard; Golosnoy, Igor O.; Lewin, P.L.

doi:10.1088/0022-3727/47/38/385301

Cited by 35 publications

(27 citation statements)

References 20 publications

(30 reference statements)

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“…The thermal properties of the three phases provided by [25,26] are given in Table 2. Due to the elastic brittle behavior of CFRP, the heat generated by plastic deformation is negligible and the unique heat source taken into account in the model was produced by the friction at the contact surface between the tool and workpiece.…”

Section: Fe Modeling Of Fiber-reinforced Polymer Composites 31 Descrmentioning

confidence: 99%

Factor analysis of machining parameters of fiber-reinforced polymer composites based on finite element simulation with experimental investigation

Gao

Xiao

et al. 2015

Int J Adv Manuf Technol

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A three-dimensional (3D) micromechanical finite element (FE) model of machining of fiber-reinforced polymer (FRP) composites was developed in the paper. The FE modeling considers the three phases of a composite, in which the interphase between the fiber and matrix can realize interfacial debonding to represent the failure of composites and allow heat transfer. The machined surface observations and surface roughness measurements of carbon fiber-reinforced polymer (CFRP) composites at different fiber orientations were done firstly, and then, the model predictions of the machining responses, such as cutting force, temperature, and surface roughness, at different fiber orientations were compared with various experimental data for model validation. It is indicated that the three-phase micromechanical model is capable of precisely predicting machining responses and describing the failure modes of fiber shearing or bending related with fiber orientations in the chip formation process. To investigate the complex coupling influences of multiple machining parameters on the key responses of CFRP composites, the singlefactor analyses of each machining parameter were first carried out, and then, the multi-factorial analysis of multiple machining parameters was performed based on the orthogonal design of experiment and the analysis of variance (ANOVA) to quantitatively compare the influences of these key machining parameters on the cutting force and surface roughness. It was found that the fiber orientation angle, depth of cut, and cutting speed prove to be the important factors affecting the cutting force and surface roughness and that the coupling effects of these machining parameters all are relatively negligible in the machining of CFRP composites.

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Section: Fe Modeling Of Fiber-reinforced Polymer Composites 31 Descrmentioning

confidence: 99%

Factor analysis of machining parameters of fiber-reinforced polymer composites based on finite element simulation with experimental investigation

Gao

Xiao

et al. 2015

Int J Adv Manuf Technol

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“…This numerical model, which was mainly based on the model by Chippendale et al [24], considered the processes of the thermal transport, the polymer degradation, the pyrolysis gases transport, and the carbon fiber sublimation in the composite. The model formulations [2436] and the calculation parameters [18,24,29] Figure 8 shows the temperature field and the internal gas pressure distribution in the composite along the thickness direction with a laser irradiation time of 1 ms (1 pulse duration). From the temperature profiles of Figure 8, it could be found that a higher laser peak power density led to a faster temperature rise and a faster heat transfer in the composite.…”

Section: Simulation Of the Internal Gas Pressurementioning

confidence: 99%

“…To prove the speculation, a two-dimensional axisymmetric finite element model was established in order to predict the temperature field and the internal gas pressure in the composite during the laser drilling. This numerical model, which was mainly based on the model by Chippendale et al [24], considered the processes of the thermal transport, the polymer degradation, the pyrolysis gases transport, and the carbon fiber sublimation in the composite. The model formulations [24][25][26][27][28][29][30][31][32][33][34][35][36] and the calculation parameters [18,24,29] Figure 8 shows the temperature field and the internal gas pressure distribution in the composite along the thickness direction with a laser irradiation time of 1 ms (1 pulse duration).…”

Section: Simulation Of the Internal Gas Pressurementioning

confidence: 99%

“…In this model, the resin matrix layer with a 0.1 mm thickness and the carbon fibers layer with a 0.06 mm thickness were separated. The model formulations [8,32,33,[38][39][40] and the calculation parameters [18,24,29] are given in the Appendix A.3 of the Appendix A.…”

Section: Simulation Of the Entrance Hole Diameter And The Surface Hazmentioning

confidence: 99%

“…The initial volume fraction of gas V gas o was assumed to be 0.003 in this model. The governing equation of the thermal transport through the composite could be written as follows [24,25,28]:…”

Section: Glossary Of Symbolsmentioning

confidence: 99%

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Investigation on the Continuous Wave Mode and the ms Pulse Mode Fiber Laser Drilling Mechanisms of the Carbon Fiber Reinforced Composite

Hou

Han

et al. 2020

Polymers

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The near infrared (NIR) laser drilling of a carbon fiber reinforced polymer (CFRP) composite in the continuous wave (CW) mode and the ms pulse mode was investigated by an experiment and a numerical simulation. The relationships between the laser penetrating time, entrance hole diameter, surface heat affected zone (HAZ) width, and material ablation rate and the laser irradiation time and laser peak power densities were obtained from the experiment. For the same average power density of the laser output, 3.5 kW/cm2, it was found that the ms pulse laser mode, which had a higher peak power density, had a higher drilling efficiency. When drilling the same holes, the pulse laser mode, which had the highest peak power density of 49.8 kW/cm2, had the lowest drilling time of 0.23 s and had the smallest surface HAZ width of 0.54 mm. In addition, it was found that the laser penetrating time decreased sharply when the peak power density was higher than 23.4 kW/cm2. After analyzing the internal gas pressure by the numerical simulation, it was considered that a large internal gas pressure appeared, which resulted from polymer pyrolysis, causing a large amount of the mechanical erosion of the composite material to improve the drilling efficiency. Therefore, the ms pulse laser showed its potential and advantage in laser drilling the CFRP composite.

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Modeling the thermal decomposition and residual mass of a carbon fiber epoxy matrix composite with a phenomenological approach: Effect of the reaction scheme

et al. 2021

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Summary The thermal decomposition of polymer matrix composites is a complex process involving hundreds of reactions and species, which are often modeled with simplified one‐step schemes. These schemes can be improved by adding intermediate reactions of different nature (competitive, parallel, and consecutive). However, the optimal number and nature of intermediate reactions are rarely discussed. In this paper, several reaction schemes of increasing complexity have been developed to model the decomposition of a carbon/epoxy composite. The kinetic parameters describing each reaction have been extracted from thermogravimetric analysis (TGA) by means of isoconversional methods. The composite mass loss rate and residual mass have been modeled and compared to TGA and tube furnace data. This research shows that adding parallel or consecutive intermediate reactions improves the agreement against TGA data compared to a single‐step model, but only competitive reactions can account for the variation of the residual mass observed in the tube furnace when the heating rate is varied.

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Numerical modelling of thermal decomposition processes and associated damage in carbon fibre composites

Cited by 35 publications

References 20 publications

Factor analysis of machining parameters of fiber-reinforced polymer composites based on finite element simulation with experimental investigation

Factor analysis of machining parameters of fiber-reinforced polymer composites based on finite element simulation with experimental investigation

Investigation on the Continuous Wave Mode and the ms Pulse Mode Fiber Laser Drilling Mechanisms of the Carbon Fiber Reinforced Composite

Modeling the thermal decomposition and residual mass of a carbon fiber epoxy matrix composite with a phenomenological approach: Effect of the reaction scheme

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