Thermal degradation of PC and PA6 during laser transmission welding

Bates, P. J.; Okoro, T. B.

doi:10.1007/s40194-014-0209-9

Cited by 27 publications

(4 citation statements)

References 31 publications

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“…It was also found that increasing the proportion of PET in the blends resulted in more thermal degradation, and the blends containing PET achieved higher weld strength than pure PBT. The SB model, the nth-order model, and the 3D quasi-static finite element thermal model were combined by Bates et al [90] to simulate the thermal degradation of PC and PA6 in LTW. The study found that the power at which degradation begins decreases with ing absorber content, which is consistent with the power at which shear strength begins to decrease.…”

Section: Thermal Degradation Simulation In Ltwmentioning

confidence: 99%

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

Zuo

2023

Polymers

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Laser transmission welding (LTW) is an excellent process for joining plastics and is widely used in industry. Numerical simulation is an important method and area for studying LTW. It can effectively shorten the experimental time and reduce research costs, aid in understanding the welding mechanism, and enable the acquisition of ideal process parameters. To enhance understanding of numerical simulation studies on LTW and facilitate research in this area, this paper presents a comprehensive overview of the progress made in numerical simulation of LTW, covering the following aspects: (a) characteristics of the three heat source models for LTW temperature field simulation, including surface heat source model, volumetric heat source model, and hybrid heat source model, along with the methods, results, and applications of temperature field simulation based on these models and experimental validation; (b) numerical simulation of thermal and residual stresses based on the temperature field; (c) numerical simulation of the melt flow field; and (d) predictive simulation of material degradation. The conclusion of the review and the prospects for further research work are eventually addressed.

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Section: Thermal Degradation Simulation In Ltwmentioning

confidence: 99%

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

Zuo

2023

Polymers

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“…There is a considerable amount of research on the interaction between PA6 and other materials. However, the relatively weak bonding strength remains a major obstacle to its substitution of metal materials [4][5]. Therefore, studying ways to enhance the adhesive strength between reinforced resins becomes particularly important.…”

Section: Introductionmentioning

confidence: 99%

High injection molding welding strength and cross-sectional analysis of carbon fiber composite materials

Wu,

Qiu,

Sakai

et al. 2024

J. Phys.: Conf. Ser.

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In this study, carbon fibers, commonly used as reinforcement materials, were added to polyamide (nylon) PA6 to fabricate carbon fiber-reinforced thermoplastic composites (CFRTP), which were then subjected to injection molding welding. The aim of this research was to investigate the positive influence of carbon fibers on injection molding welding strength and explore the optimal injection conditions. Three different joining combinations and various injection parameters were examined. The tensile fracture surfaces after welding were observed using polarized microscopy and scanning electron microscopy. The reinforcing mechanism of carbon fibers was analyzed. Ultimately, the optimal conditions were determined as a mold temperature of 120°C, an injection temperature of 380°C, and an injection velocity of 150 mm/s. The addition of carbon fibers exhibited significant strengthening effects on the injection molded joints, and it also provided the potential for injection molding welding between resins with poor compatibility.

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“…6 Among them, polyamide 6 (PA6), as one of the most commonly used engineering polymer materials, has a wide range of applications in various industries, and there are many studies on the connection of PA6 itself and other materials. 7,8 However, the weak connection strength is a big obstacle preventing its replacement of metal materials. Therefore, it is particularly important to study the strengthening of the bonding strength between resins.…”

Section: Introductionmentioning

confidence: 99%

“…Considered together, these properties make thermoplastic resins an attractive option for combining with metal materials in multimaterial designs 6 . Among them, polyamide 6 (PA6), as one of the most commonly used engineering polymer materials, has a wide range of applications in various industries, and there are many studies on the connection of PA6 itself and other materials 7,8 . However, the weak connection strength is a big obstacle preventing its replacement of metal materials.…”

Section: Introductionmentioning

confidence: 99%

Distribution and reinforcement effect of carbon fiber at the interface in injection welding of polyamide 6 composites

Wu,

Qiu,

Zhang

et al. 2023

Polymer Composites

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To meet the lightweight production requirements of automobiles and achieve high strength, reinforced thermoplastic composite materials are gradually replacing metal materials. Injection molding is the preferred manufacturing method to enable the production of complex‐shaped parts, facilitate production, and reduce costs. In this study, carbon fiber (CF) was added to the commonly used resin‐reinforcing material, polyamide (nylon) PA6, to create a CF‐reinforced thermoplastic composite (polyamide 6 [PA6]/CF) that was welded using injection molding. This study not only investigates the impact of different welding conditions on shear strength but also discusses the sequence of welding. Achieving 85% of the shear strength of the PA6 base material under ideal circumstances. The CF distribution and reinforcement mechanism were analyzed by observing the connection interface and cross section using a polarizing microscope and a scanning electron microscope. When PA6/CF was used as the secondary molded body, the welding results were better. The addition of CF had a significant strengthening effect on the strength of the PA6 injection welding.Highlights Carbon fiber‐reinforced thermoplastic composite materials were prepared, and welding with PA6 was achieved using the injection molding method. The optimal welding parameters were determined by varying the mold, injection speed, injection temperature, and order of injection. The maximum welding shear strength reached 85% of the base material shear strength. The positive effect of specific fiber distribution on welding strength was analyzed by observing the interface using a scanning electron microscope and a polarizing microscope. This study provides valuable insights into the optimization of welding processes for carbon fiber thermoplastic composite materials, offering possibilities for connecting dissimilar materials with poor compatibility.

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Thermal degradation of PC and PA6 during laser transmission welding

Cited by 27 publications

References 31 publications

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

High injection molding welding strength and cross-sectional analysis of carbon fiber composite materials

Distribution and reinforcement effect of carbon fiber at the interface in injection welding of polyamide 6 composites

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