Electromagnetic heating for adhesive melting in CFRTP joining: study, analysis, and testing

Nele, Luigi; Palmieri, Barbara

doi:10.1007/s00170-019-04910-9

Cited by 16 publications

(10 citation statements)

References 23 publications

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“…In recent years, significant strides have been made by scholars in the realm of electromagnetic induction heating of CFRP. [13][14][15][16] For instance, Bayerl 17 and Moser 18 have demonstrated that uniform heating can be achieved by reducing the effective coupling distance, with a smaller coupling distance yielding superior heating effects. Ruddev 19 and Rapoport 20 have revealed that the concentration of magnetic field lines in circular coils can result in uneven magnetic fields and heating.…”

Section: Introductionmentioning

confidence: 99%

Research on the heating rate of induction heating CFRP and temperature field based on image entropy

Pei

Deng

Shi

et al. 2023

High Performance Polymers

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The electromagnetic induction heating technology has the advantages of fast heating speed and cleanness, and can realize the rapid temperature curing of carbon fiber reinforced polymer (CFRP). In order to improve production efficiency and curing quality, a finite element model of induction heating CFRP was established, and the temperature field distribution and heating mechanism during induction heating of CFRP were analyzed. The correctness of the model and conclusion is verified by experiments. On this basis, the influence of current, diameter, frequency and distance on the heating rate is analyzed, and it is found that frequency has the greatest influence on the heating rate. In addition, the mathematical relationship between temperature field uniformity and entropy value is established, which provides a quantitative analysis method for the temperature field uniformity of induction heating CFRP. Through optimization analysis, it is obtained that for the CFRP mentioned in the article, the coil size is selected between 65 mm and 95 mm, and the spacing is between 3.5 mm and 6.5 mm, so that the temperature field has the best uniformity.

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Section: Introductionmentioning

confidence: 99%

Research on the heating rate of induction heating CFRP and temperature field based on image entropy

Pei

Deng

Shi

et al. 2023

High Performance Polymers

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“…In the second application area, ECAs can improve electromagnetic shielding properties or lightning strike protection by forming the interlayer between the joining lightweight composites used in automotive or aircraft sectors. Here, the ECAs are a promising candidate for eliminating commonly used rivets resulting in lower stress concentration and weight of the final parts [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Electrically Conductive Adhesive Based on Thermoplastic Hot Melt Copolyamide and Multi-Walled Carbon Nanotubes

2022

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For the bonding of the lightweight composite parts, it is desired to apply electrically conductive adhesive to maintain the ability to shield electromagnetic interference. Among various solvent-based adhesives, there is a new group of thermoplastic hot melt adhesives that are easy to use, solidify quickly, and are environment-friendly. To make them electrically conductive, a copolyamide-based hot melt adhesive was mixed with 5 and 10 wt% of carbon nanotubes using a melt-blending process. Well-dispersed nanotubes, observed by a high-resolution scanning microscope, led to the formation of a percolated network at both concentrations. It resulted in the electrical conductivity of 3.38 S/m achieved for 10 wt% with a bonding strength of 4.8 MPa examined by a lap shear test. Compared to neat copolyamide, Young’s modulus increased up to 0.6 GPa and tensile strength up to 30.4 MPa. The carbon nanotubes improved the thermal stability of 20 °C and shifted the glass transition of 10 °C to a higher value. The very low viscosity of the neat adhesive increased about 5–6 orders of magnitude at both concentrations, even at elevated temperatures. With a simultaneous growth in storage and loss modulus this indicates the strong interactions between polymer and carbon nanotubes.

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“…Adhesive bonding quality is related to surface treatment and the choice of bonding agent, but the large number of users of bonding agents will pollute the environment. To overcome the above shortcoming, laser welding [9][10][11][12][13], induction welding [14][15][16][17], friction stir welding [18][19][20], and ultrasonic welding [21][22][23] were adopted in joining of CFRTP to Al alloy. Among all the joining technologies employed to date, laser welding with high e ciency and few defects was more useful to expand the application range of multi-materials structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of groove configuration on mechanical properties and fracture behavior of 6061 Al alloy and CFRTP laser joint

Liu

Wang

et al. 2022

Int J Adv Manuf Technol

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Laser surface texturing is generally a promising approach to enhance the adhesion property of metalthermoplastic hybrid structure, and the effect is related to the groove con guration. Laser joining of carbon ber reinforced thermoplastic composite (CFRTP) to 6061 Al alloy under various groove con guration was carried out, aimed to investigate the effect of groove width and depth on interfacial morphology, mechanical properties and fracture behavior of CFRTP/ Al joints. The tensile-shear force was tested, and the fracture surface and interface morphology were observed by scanning electron microscopy. Besides, the numerical simulation of temperature eld was conducted to reveal the joining mechanism. The results indicate that the tensile shear strength of CFRTP/ Al joint gradually increases with the increase of groove width and reaches the peak value of 22.8 MPa when the width is 0.5 mm, then it decreases as the groove width is further increased. Compared to groove width, the tensile shear strength of CFRTP/ Al joint presents similar variation trend with the increasing groove depth on Al alloy surface. When the groove depth reaches 0.6 mm, the maximum joint strength is 24.33MPa. After laser textured Al alloy, the surface fracture mode of CFRTP/Al laser joint features mixed fracture mode including cohesive fracture and interface fracture. This study provides a deeper understanding of the effect of groove con guration on the laser joining of CFRTP/ Al hybrid structure and potentially lays a foundation for the adjustment of suitable groove con guration toward obtaining the desired effect.

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Electromagnetic heating for adhesive melting in CFRTP joining: study, analysis, and testing

Cited by 16 publications

References 23 publications

Research on the heating rate of induction heating CFRP and temperature field based on image entropy

Research on the heating rate of induction heating CFRP and temperature field based on image entropy

Electrically Conductive Adhesive Based on Thermoplastic Hot Melt Copolyamide and Multi-Walled Carbon Nanotubes

Effect of groove configuration on mechanical properties and fracture behavior of 6061 Al alloy and CFRTP laser joint

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