Manufacture of steel–CF/PA6 hybrids in a laser tape placement process: Effect of first-ply placement rate on thermal history and lap shear strength

Stokes-Griffin, Christopher; Kollmannsberger, A; Ehard, S.; Compston, Paul; Drechsler, Klaus

doi:10.1016/j.compositesa.2018.05.007

Cited by 25 publications

(11 citation statements)

References 51 publications

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“…In addition, the model has been optimized by the researchers concerned. Some scholars have analyzed the influence law of the temperature of the press roll on the temperature of the forming area during the lay-up process by establishing a two-dimensional finite element model related to the press roll [8] .…”

Section: Introductionmentioning

confidence: 99%

The effect of temperature field on the characteristics of carbon fiber reinforced thermoplastic composites in the laying and shaping process

Zhao

Liu²,

Chen³

et al. 2022

Int J Adv Manuf Technol

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The temperature field during the automated lay-up of carbon fiber reinforced thermoplastic composites is investigated in this work. The heat transfer boundary conditions of the lay-up process are determined by establishing a mathematical model of the temperature field; the basic properties of the material are determined using CF/PEEK as the research object; the heat transfer parameters in the temperature field are analyzed to determine the thermal convection region affected by hot air and the radiated heat of the infrared lamp; and a finite element model of the temperature field is established.The FEM temperature field model was created to investigate heat transfer throughout the lay-up process, as well as the impact of mold heating, layup preheating, and varied heating temperatures on different lay-ups. The temperature change law of different lay-ups under different heating and preheating temperatures of hot air is analyzed; the online temperature measurement device is built, and the automatic lay-up experiment is carried out to analyze the heating performance of infrared lamp and hot air gun and to determine their relevant parameters.Using the results of experiments and simulations, it has been determined that different mold temperatures are required for different lay-ups; preheating can effectively reduce the temperature gradient between lay-ups; and at a lay-up speed of 5mm/s, a preheating temperature of 200°C and a hot air temperature above 400°C can ensure that the critical temperature between the prepreg wire bundle and lay-ups reaches the melting point and can be laid up normally.

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Section: Introductionmentioning

confidence: 99%

The effect of temperature field on the characteristics of carbon fiber reinforced thermoplastic composites in the laying and shaping process

Zhao

Liu²,

Chen³

et al. 2022

Int J Adv Manuf Technol

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“…The application range of the laser-based TAFP is currently focused on the manufacture of CFRP structures. The fabrication of hybrid structures is presented, for example, in [ 13 , 14 ] as a metal-CFRP hybrid. The deposition of thermoplastic prepregs on thermoplastic foam has not yet been considered.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Use of a PEI Foam as Core Material for the In-Situ Production of Thermoplastic Sandwich Structures Using Laser-Based Thermoplastic Automated Fiber Placement

et al. 2022

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Laser-based thermoplastic automated fiber placement (TAFP) is nowadays mainly used to produce pure carbon fiber-reinforced plastic (CFRP) structures. This paper investigates the feasibility of a novel application: The deposition of thermoplastic prepreg tapes onto a thermoplastic foam for the production of thermoplastic sandwich structures. Therefore, simple deposition experiments of thermoplastic PEEK/CF prepreg tapes on a PEI closed-cell foam were carried out. 3D surface profile measurements and peel tests according to DIN EN 28510-1 standard were used to investigate the joining area and bonding quality. The results show that a cohesive bond is formed between the deposited tapes and the foam core, however the foam structure in the area of the deposited tapes deforms in dependence of the process parameters, and increasingly with higher deposition temperatures. Due to the deformations that occur during tape deposition, the thermomechanical foam behavior under the TAFP process conditions was investigated in more detail in a subsequent study for an extensive parameter space using a simple experimental setup. Results show that for suitable process parameters, namely a short contact time and a high temperature, the foam deformation can be minimized with the simultaneous formation of a thin melting layer required for cohesive bonding. The inner foam core structure remains unaffected.

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“…The consolidation of traditional thermoset-based FMLs requires a simultaneous combination of high temperature, high pressure, and long process cycle time. Nevertheless, thermoplasticbased (TP-based) FMLs have the advantage of better toughness, high production efficiency, excellent recyclability, and thermal deformation [6,7]. With the continuous development of the public transportation industry, TP-based FMLs have attracted attention from many experts and scholars.…”

Section: Introductionmentioning

confidence: 99%

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

Lin

Zhang

et al. 2021

Polymers

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The weak interface performance between metal and composite (IPMC) makes the composite materials susceptible to impact load. Aluminum/glass fiber/polypropylene (Al/Gf/PP) laminates were manufactured with the aluminum alloy sheets modified by nitrogen plasma surface treatment and the phosphoric acid anodizing method, respectively. FEM models of Al/Gf/PP laminates under low-velocity impact were established in ABAQUS/Explicit based on the generated data including the model I and II interlaminar fracture toughness. Low-velocity impact tests were performed to investigate the impact resistance of Al/Gf/PP laminates including load traces, failure mechanism, and energy absorption. The results showed that delamination was the main failure mode of two kinds of laminates under the impact energy of 20 J and 30 J. When the impact energy was between 40 J and 50 J, there were metal cracks on the rear surface of the plasma pretreated specimens, which possessed higher energy absorption and impact resistance, although the integrity of the laminates could not be preserved. Since the residual compressive stress was generated during the cooling process, the laminates were more susceptible to stretching rather than delamination. For impact energy (60 J) causing the through-the-thickness crack of two kinds of laminates, plasma pretreated specimens exhibited higher SEA values close to 9 Jm2/kg due to better IPMC. Combined with the FEM simulation results, the interface played a role in stress transmission and specimens with better IPMC enabled the laminates to absorb more energy.

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Manufacture of steel–CF/PA6 hybrids in a laser tape placement process: Effect of first-ply placement rate on thermal history and lap shear strength

Cited by 25 publications

References 51 publications

The effect of temperature field on the characteristics of carbon fiber reinforced thermoplastic composites in the laying and shaping process

The effect of temperature field on the characteristics of carbon fiber reinforced thermoplastic composites in the laying and shaping process

Experimental Investigation on the Use of a PEI Foam as Core Material for the In-Situ Production of Thermoplastic Sandwich Structures Using Laser-Based Thermoplastic Automated Fiber Placement

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

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