Parametric study on processing parameters and resulting part quality through thermoplastic tape placement process

Khan, Muhammad Amir; Mitscháng, Peter; Schledjewski, Ralf

doi:10.1177/0021998312441810

Cited by 66 publications

(53 citation statements)

References 18 publications

(33 reference statements)

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“…The critical process parameters [2,3] pressure p, velocity v, tooling temperature T tool and nip point temperature T np are displayed in Figure 3. The investigated value ranges of these parameters are listed in Table 2.…”

Section: Critical Process Parametersmentioning

confidence: 99%

An investigation of in-situ AFP process parameters using CF/LM-PAEK

Schiel

Raps

Chadwick

et al. 2020

Advanced Manufacturing: Polymer & Composites Science

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In recent years the use of thermoplastics has become popular in aerospace applications, with a primary focus on fiber-reinforced composites. Displaying greatly improved mechanical properties, new components using these materials still need to be characterized and their suitability for aviation applications demonstrated. A common restriction to the implementation of fiber-reinforced thermoplastic parts is the almost default autoclave manufacturing, which is both time consuming and expensive. Aiming for a more economical final product, this study utilizes a one-step in-situ Automated Fiber Placement (AFP) process to produce samples for mechanical and thermal characterization. The recently developed and highly popular material CF/LM-PAEK was used within this study, with the four major AFP processing parameters varied to assess material sensitivity. Test samples were manufactured using Design of Experiment (DoE). Subsequently, single lap shear (SLS) and differential scanning calorimetry (DSC) tests were performed to assess consolidation quality. With rising tooling temperature, both SLS strength and crystallinity increase up to 31 MPa and 25%, respectively. A post-manufacturing tempering process improved crystallinity of the tested CF/LM-PAEK specimens up to 29% and SLS strength up to 38 MPa. Within the tested parameter range, CF/LM-PAEK appeared to be unaffected by increasing layup speed, which is a promising aspect with regard to faster industrial production.

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Section: Critical Process Parametersmentioning

confidence: 99%

An investigation of in-situ AFP process parameters using CF/LM-PAEK

Schiel

Raps

Chadwick

et al. 2020

Advanced Manufacturing: Polymer & Composites Science

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“…Various researchers [58,88,[90][91][92]94,95] identify the compaction force and temperature applied to the fiber material during deposition as relevant process parameters. They significantly affect the amount of air entrapped within the laminate during consolidation of individual plies.…”

Section: Type Viii-voidage and Inclusionsmentioning

confidence: 99%

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

Heinecke

Willberg

2019

J. Compos. Sci.

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The automated fiber placement process (AFP) enables the manufacturing of large and geometrical complex fiber composite structures with high quality at low cycle times. Although the AFP process is highly accurate and reproducible, manufacturing induced imperfections in the produced composite structure occur. This review summarizes and classifies typical AFP-related manufacturing defects. Several methodologies for evaluating the effects of such manufacturing defects from the literature are reviewed. This review paper presents recent scientific contributions and discusses proposed experimental and simulation-based methodologies. Among the identified ten defect classes, gaps and overlaps are predominant. This paper focuses then on methods for modelling and assessing gaps and overlaps. The state of the art in modelling gaps and overlaps and assessing their influence on mechanical properties is presented. Finally, research gaps and remaining issues are identified.

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“…The assumed temperature dependent viscosity relation lðTÞ for the interface was that of neat PEEK 150 polymer [23]:…”

Section: Intimate Contact Modelsmentioning

confidence: 99%

“…The bonding process is a combination of the flattening of the asperities at the interface (intimate contact development [11][12][13]), and the diffusion of polymer chains across the interface (autohesion or healing [14][15][16]). Other physical processes occur simultaneously during the process such as changes in crystallinity [5,17,18], void content [9,19], residual stress [20,21] and degradation [22,23] -all of which are sensitive to the specific temperature history. Optimisation of the quality of the resulting composite is non-trivial due to the multi-faceted nature of the process [22,24,25].…”

Section: Introductionmentioning

confidence: 99%

An inverse model for optimisation of laser heat flux distributions in an automated laser tape placement process for carbon-fibre/PEEK

Stokes-Griffin

Compston

2016

Composites Part A: Applied Science and Manufacturing

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a b s t r a c tHigh power diode lasers have enabled higher placement rates to be achieved in automated tape placement (ATP) of thermoplastic-based composite materials. Laser ATP heads in published literature employ homogeneous linear or rectangular laser spots, however a variety of solutions are available to produce customised irradiance profiles. No efforts to date have investigated what a more ideal heat flux profile would be for laser ATP in terms of length and distribution. This paper describes a method to determine the required laser heat flux profiles to achieve desired heating zone temperature profiles by means of an inverse thermal model. A bonding model was implemented to assess the performance of various heating zone temperature profiles for placement at 400 mm/s. Short beam strengths from experimental trials were used to validate the bonding model. A two-stepped heating profile was found to provide a good balance of increased strength with a small increase in power requirement.

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Parametric study on processing parameters and resulting part quality through thermoplastic tape placement process

Cited by 66 publications

References 18 publications

An investigation of in-situ AFP process parameters using CF/LM-PAEK

An investigation of in-situ AFP process parameters using CF/LM-PAEK

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

An inverse model for optimisation of laser heat flux distributions in an automated laser tape placement process for carbon-fibre/PEEK

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