Modeling of the material removal and heat affected zone formation in CFRP short pulsed laser processing

Xu, Hebing; Hu, Jun

doi:10.1016/j.apm.2017.01.072

Cited by 42 publications

(17 citation statements)

References 14 publications

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“…Theoretical models of CFRP laser machining can lay a theoretical foundation for experiments and numerical simulations. Xu et al [ 101 ] proposed a numerical model to study the material removal mechanism of CFRP laser grinding ( Figure 16 a). Through parameter analysis, it is found that the distance between two adjacent laser pulses with completely degenerated matrix should be used to effectively utilize mechanical erosion.…”

Section: Cfrp Laser Processing Theoretical Model and Numerical Simula...mentioning

confidence: 99%

A Review of Research Progress on Machining Carbon Fiber-Reinforced Composites with Lasers

et al. 2022

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Carbon fiber-reinforced composites are widely used in automobile, aerospace and military lightweight manufacturing due to their excellent mechanical properties such as light weight, excellent fracture resistance, corrosion resistance and wear resistance, etc. However, because of their high hardness, anisotropy and low interlayer strength characteristics, there are many problems with machine carbon fiber-reinforced composites with traditional methods. As a non-contact processing technology, laser machining technology has lots of advantages in carbon fiber-reinforced composites processing. However, there are also some defects produced in laser machining process such the heat affected zone, delamination and fiber extraction due to the great difference of physical properties between the carbon fibers and the resin matrix. To improve the quality of carbon fiber-reinforced composites laser machining, lots of works have been carried out. In this paper, the research progress of carbon fiber-reinforced composites laser machining parameters optimization and numerical simulation was summarized, the characteristics of laser cutting carbon fiber-reinforced composites and cutting quality influence factors were discussed, and the developing trend of the carbon fiber-reinforced composites laser cutting was prospected.

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Section: Cfrp Laser Processing Theoretical Model and Numerical Simula...mentioning

confidence: 99%

A Review of Research Progress on Machining Carbon Fiber-Reinforced Composites with Lasers

et al. 2022

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“…Under the combined action of laser irradiation and tangential airflow, complex ablation behaviors may occur, such as pyrolysis of the polymer matrix, oxidation and sublimation of residual char and fibers, and thermomechanical erosion. Several works have been reported on the laser ablation of polymer-based composites [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. There are few studies considering the influence of tangential airflow.…”

Section: Introductionmentioning

confidence: 99%

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Wang

Song

et al. 2023

Materials

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Experimental and numerical investigations of the instantaneous ablation behavior of laminated carbon fiber-reinforced polymer (CFRP) exposed to an intense continuous-wave (CW) laser in a supersonic wind tunnel are reported. We establish an in situ observation measurement in the experiments to examine the instantaneous ablation behavior. The surface recession depth is calculated by using the Particle Image Velocimetry (PIV) method, taking the ply angle of laminated CFRP as a reference. A coupled thermal-fluid-ablation numerical model incorporating mechanisms of oxidation, sublimation, and thermomechanical erosion is developed to solve the ablation-through problem of multilayer materials. The results show that the laser ablation depth is related to the laser power density, airflow velocity and airflow mode. Thermomechanical erosion is the primary ablation mechanism when the surface temperature is relatively low and the cavity flow mode is a closed cavity flow. When the surface temperature reaches the sublimation of carbon and the airflow mode is transformed to open cavity flow, sublimation plays a dominant role and the ablation rate of thermomechanical erosion gradually decreases.

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“…In 2010, Negarestani et al 7 established a micro-finite element simulation model to study the influence of process parameters on the size of the HAZ, which could not explain the interaction between adjacent laser pulses. In 2017, Xu, Hb et al 8 established a homogenized three-dimensional numerical model of laser milling CFRP, considering the interaction of continuous-pulse laser and its influence on material removal, revealed the influence of adjacent pulses on material removal, and predicted the average ablation depth of scanning channel under the optimal spacing. In 2018, Ohkubo et al 9 simulated the dynamic process of high temperature and high pressure compressed gas laser ablation of CFRP and found that when the depth is shallow, the resin is removed in a large area, and with the increase of the treatment depth, a circular incision will be generated.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

et al. 2021

Journal of Reinforced Plastics and Composites

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In this article, a micro-heterogeneous material simulation model with carbon fiber and resin phase about laser ablation on carbon fiber reinforced plastic (CFRP) is established by Ansys. The ablation process of CFRP by nanosecond ultraviolet laser is simulated, and the mechanism of pulse energy and spot spacing on the heat-affected zone (HAZ) is studied, then the process parameters are optimized with the goal of HAZ size and processing efficiency, and finally the validity of the model is verified by experiments. It is found that the residual gradient and the width of the radial HAZ increase with the increase of the spot spacing, and the width of the axial HAZ decreases slightly with the increase of the spot spacing, which indicates the existence of the optimal spot spacing. Second, the ablation depth increases with the increase of the pulse energy, and the carbon fiber retains a relatively complete degree of exposure when the pulse energy is low, which has a certain guiding significance for the cleaning and bonding of CFRP.

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Modeling of the material removal and heat affected zone formation in CFRP short pulsed laser processing

Cited by 42 publications

References 14 publications

A Review of Research Progress on Machining Carbon Fiber-Reinforced Composites with Lasers

A Review of Research Progress on Machining Carbon Fiber-Reinforced Composites with Lasers

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

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