Effects of temperature distribution caused by energy accumulation on the bonding properties of carbon fiber composite components

Wang, Qian; Pu, Lei; Jia, Chengguo; Li, Zhixin; Li, Jun

doi:10.1002/pc.27133

Cited by 4 publications

(12 citation statements)

References 31 publications

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“…FTIR spectroscopy is an effective method commonly used to analyze and identify the internal molecular composition and structure of materials 31 . In this test, because the influence of high temperatures on composites was reflected in the elevated‐temperature wet group, only the cold‐temperature dry state, room‐temperature dry state, and elevated‐temperature wet state were analyzed.…”

Section: Methodsmentioning

confidence: 99%

Effect of temperature and moisture composite environments on the mechanical properties and mechanisms of woven carbon fiber composites

Chen,

Yang,

Xiao

et al. 2024

Polymer Composites

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Temperature and moisture are important environmental conditions governing the usage of carbon fiber‐reinforced plastics (CFRP). In this study, tensile, compression, and shear tests of woven CFRP composites were conducted in four composite environments: cold‐temperature dry state, room‐temperature dry state, elevated‐temperature dry state, and elevated‐temperature wet state. Fourier transform infrared (FTIR) spectroscopy was used to analyze the molecular composition and structure under these environments. The fracture morphology was also analyzed using scanning electron microscopy (SEM) to understand the deterioration mechanism of the material properties at the macro and micro scales. Finally, a two‐parameter Weibull statistical model was used to evaluate the scattering of the composites. The results demonstrate that the tensile, compressive, and shear properties of the material decrease under harsh conditions, and the degradation effect on the ultimate strength is much greater than that of the modulus. Cold‐temperature dry and elevated‐temperature wet conditions are particularly severe. Composite environments significantly affect the macroscopic failure process and ultimate failure mode of materials. In general, the temperature and humidity of the matrix system acts at the core of the deterioration mechanism of composites, affecting the properties of the fiber/matrix and orthogonal woven fiber interfaces, and eventually resulting in a loss of their constitutive strength and bearing capacity. The theoretical ultimate strength were consistent with the experimental values.Highlights Comprehensive mechanical property testing in multiple composite environments. Degradation mechanisms were revealed from multiscale morphology analysis. Scattering of composites were evaluated using statistical analyses. Cold temperature dry and elevated temperature wet were the worst states. Deterioration effect of environment on matrix and interface is the core failure mechanism.

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Section: Methodsmentioning

confidence: 99%

Effect of temperature and moisture composite environments on the mechanical properties and mechanisms of woven carbon fiber composites

Chen,

Yang,

Xiao

et al. 2024

Polymer Composites

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“…The model proposed in this study for the laser power profile at the interface is based on the classical model presented in previous literature. 2,6,13 In this model, the laser beam power propagated through the transparent component is modeled in terms of a Gaussian beam as described in Equation (1):…”

Section: Numerical Model Used For Inverse Methodsmentioning

confidence: 99%

“…The simulation was carried out using the commercial finite element software COMSOL Multiphysics®, which implemented a volume heat source to model the absorption of laser radiation in the transparent‐absorbent substrates. The model proposed in this study for the laser power profile at the interface is based on the classical model presented in previous literature 2,6,13 . In this model, the laser beam power propagated through the transparent component is modeled in terms of a Gaussian beam as described in Equation (1):

I (X, Y, Z) = \frac{(1 - R_{s}) \times δ (Z) \times P_{O}}{2 π {σ_{0}}^{2}} \exp [- (\frac{X {((), t)}^{2}}{2 {σ_{0}}^{2}} + \frac{{Y_{0}}^{2}}{2 {σ_{0}}^{2}})] .

Where P 0 is the initial laser power,

σ_{0}

is the initial surface distribution,

R_{s}

is the reflection coefficient, and

δ (Z)

is the light scattering ratio.…”

Section: Numerical Model Used For Inverse Methodsmentioning

confidence: 99%

“…A well-established bonding strength between welded parts depends on both an optimal temperature distribution within the heat-affected zone and a controlled welding time. 6 Thermoplastics have the potential to become effective laser-absorbing materials by incorporating suitable near-infrared (NIR) pigments, such as carbon black. The absorption capabilities of the resulting material are dependent on both the type and concentration of the pigment used.…”

Section: Introductionmentioning

confidence: 99%

“…This causes heating at the interface of the substrate, which results in melting and fusion of the materials, creating a bond between the two parts when the temperature is greater than the melting point in this area. A well‐established bonding strength between welded parts depends on both an optimal temperature distribution within the heat‐affected zone and a controlled welding time 6 . Thermoplastics have the potential to become effective laser‐absorbing materials by incorporating suitable near‐infrared (NIR) pigments, such as carbon black.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Laser intensity and surface distribution identification at weld interface during laser transmission welding of thermoplastic polymers: A combined numerical inverse method and experimental temperature measurement approach

Asseko

Nguyen

et al. 2023

Polymer Engineering & Sci

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The determination of the laser intensity profile necessary to weld two thermoplastic parts is crucial for understanding and optimizing the laser welding process in polymers and composite materials. Traditional methods of measuring the laser beam intensity profile, such as laser beam profiling techniques, can be difficult to implement and expensive. In this paper, we present the development of a technique that combines a numerical inverse method with experimental temperature measurements to determinate the laser intensity distribution at the weld interface. This technique does not require specialized or expensive equipment and accounts for variations in laser beam intensity caused by different components and interfaces. The technique uses thermocouple sensors to measure interface temperatures during welding, and an analytical gaussian model to estimate the laser intensity distribution at the weld interface. The model is then used as input data in a numerical heat transfer model. The technique is validated through experimental investigations on transparent and absorbent Polylactic acid polymers.

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Fatigue performance of carbon fiber‐reinforced polymer strengthened single‐edge cracked steel plates: Effects of adhesive property and CFRP arrangement

Ke,

Chen,

Feng

et al. 2024

Polymer Composites

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Carbon fiber‐reinforced polymer (CFRP) is increasingly used to improve the fatigue behavior of damaged steel structures due to its advantages, including high strength and convenient processing. However, several issues, such as the effects of the adhesive property and CFRP arrangement, still need to be studied. In this study, a total of 20 single‐cracked steel specimens were tested under fatigue load, including two unstrengthened specimens, six single‐sided strengthened specimens, and 12 double‐sided strengthened specimens. The failure mode, fatigue life, crack propagation pattern, and interface damage development were obtained from experiments. The results show that epoxy resin structural adhesives (adhesives Araldite 420 and J133C) have the best bonding properties with CFRP. For the conventional epoxy adhesives, Araldite 420 and J133C can considerably improve fatigue life, which increased by more than 44.84 times to unstrengthened specimens. CFRP plate strengthening can significantly improve the fatigue life of single‐edge cracked steel plates. For the double‐sided strengthened specimens, the fatigue life can be improved by 6.93–44.84 times that of unstrengthened specimens. For the single‐sided, the fatigue life can be improved by 2.24–2.77 times. Properties of epoxy adhesive have a more significant effect on fatigue life compared to the thickness of the CFRP plate due to debonding.Highlights Ductile epoxy adhesives are most conducive to improving the fatigue behavior of CFRP strengthened steel plates. The fatigue life of steel plates can be improved by increasing the thickness of CFRP plates and using double‐sided CFRP strengthening. Interface debonding is the main failure mode of CFRP plates strengthening single‐edge cracked steel plates under fatigue.

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Effects of temperature distribution caused by energy accumulation on the bonding properties of carbon fiber composite components

Abstract: Influence of temperature changes generated by plasma energy accumulation on bonding properties of carbon fiber composites (CFRP) was studied. The temperature field distribution on the bonding surface was built and tensile shear strength of the CFRP bonded components was evaluated. Results

Cited by 4 publications

References 31 publications

Effect of temperature and moisture composite environments on the mechanical properties and mechanisms of woven carbon fiber composites

Effect of temperature and moisture composite environments on the mechanical properties and mechanisms of woven carbon fiber composites

Laser intensity and surface distribution identification at weld interface during laser transmission welding of thermoplastic polymers: A combined numerical inverse method and experimental temperature measurement approach

Fatigue performance of carbon fiber‐reinforced polymer strengthened single‐edge cracked steel plates: Effects of adhesive property and CFRP arrangement

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