Thermoplastics and thermoplastic–matrix composites for lightweight automotive structures

Mallick, P. K.

doi:10.1016/b978-0-12-818712-8.00005-7

Cited by 58 publications

(56 citation statements)

References 17 publications

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“…Although the distribution of the longitudinal modulus reveals lower strength when E-glass fibers are used as reinforcement material, they should not be disregarded for structural applications—their lower cost make them very attractive, and the fracture toughness plays an important role in many FRP applications when impact loading is susceptible to occur. In fact, it is important to note that the modulus and strength of TPC are mainly controlled by the fiber properties, fiber weight fraction and fiber orientation when continuous fiber reinforcement lay-up is used, while the fracture toughness is primarily governed by the matrix properties [ 25 ].…”

Section: Comparison Of Tpc and Tsc Fracture Toughnessmentioning

confidence: 99%

“…The investigation about adhesive bonding of thermoplastics is mainly focused on PEEK based reinforced composites, which may not be enough for the current industry applications. Several components in aerospace and automotive applications include PEI, PES, and PPS based reinforced composites [ 25 , 27 ], for which adhesive bonding capability should be addressed.…”

Section: Tpc Joining and Repair Techniquesmentioning

confidence: 99%

“…Finite element based numerical models for fusion bonding emerged in the 1990s for resistance welding, where the energy equation was applied to predict the temperature distribution along the substrates [ 61 , 67 , 69 ]. Finite element software such ANSYS and, more recently, Comsol Multiphysics ®, have been successfully used to perform this task [ 25 , 89 ]. Comsol Multiphysics ® finite element software is well known for its multiphysics capabilities and have been successfully used to model RW, IW, and UW processes [ 48 ].…”

Section: Tpc Joining and Repair Techniquesmentioning

confidence: 99%

“…In addition, the high melt viscosity hampers the manufacture of continuous fiber TPC, as it builds resistance to impregnate the fiber bundles and wet the fibers. Continuous fiber arrangements are preferred for structural applications since they produce a much higher modulus and strength [ 25 ], which is particularly true for TPC as thermoplastic polymers have generally lower strength and stiffness than thermoset ones due to their lower crosslink density [ 26 ]. In this context, unidirectional prepreg tapes, consisting of thin sheets of continuous reinforcement fibers impregnated with thermoplastic resin, obtained directly from the fiber roving and thermoplastic melt, should be used to manufacture TPC parts with continuous fiber reinforcement [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Thermoplastic Composites and Their Promising Applications in Joining and Repair Composites Structures: A Review

2020

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Thermoset fiber reinforced composites, widely used in current structural applications, have complex repair procedures and generates significant amounts of scrap due to its recycling difficulties, which does not comply with the most recent environmental restrictions. These disadvantages may be overcome by using a thermoplastic matrix phase, which is very suitable to be joined and repaired by local melting, making the composite material fully recyclable. This work presents a literature review on the joining methods applicable to thermoplastic based composites and their potential applications to be used as repair procedures in structural elements. The effectiveness of selected adhesive and fusion bonding techniques for several thermoplastic composite systems is evaluated by a comparative study based on the joints’ strength and toughness results available in the literature. This work focuses on the three most promising fusion bonding techniques: Resistance welding, induction welding, and ultrasonic welding. The advantages and drawbacks for each one of these processes are discussed, as well as their suitability for several specific structural applications. In addition, several discordant aspects for each welding technique are identified and the corresponding recommendations are discussed. A compilation of analytical models for the mechanisms of heat generation and transient heat transfer modelling is also presented for each fusion bonding process in order to promote their application in numerical modelling.

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Section: Comparison Of Tpc and Tsc Fracture Toughnessmentioning

confidence: 99%

Section: Tpc Joining and Repair Techniquesmentioning

confidence: 99%

Section: Tpc Joining and Repair Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermoplastic Composites and Their Promising Applications in Joining and Repair Composites Structures: A Review

2020

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“…Among different approaches, lightweight automotive design, especially for body-in-white (BIW) and powertrains, proved to be one of the most important solution adopted to address the previous issues. (Mallick, 2010;Pervaiz et al, 2016;Del Pero et al, 2017;Kumar Dama et al, 2018) [1][2][3][4]. Conversely, the electric vehicles do not need solutions for fuel efficiency and emission reduction.…”

Section: Introductionmentioning

confidence: 99%

Insights into Mechanical and Thermal Properties of Additively Manufactured PLA Samples Triggered by Automotive Industry Demands

Motoc¹,

Drăghicescu²,

Florea³

et al. 2021

Mater. Plast.

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Paper explores the influence of the infill density (%), as a process parameter in additive manufacturing (3D printing), upon the mechanical (tensile, impact) and thermo-physical properties of PLA samples. The results indicated degradation of both tensile strengths and moduli with decrease of samples� relative density from 100% to 25% with 49.9% and 42.0%, respectively. Similar behaviour holds on impact strength values that degrades with 56.0% for the samples printed using a 25% infill density. The Young�s modulus variation with relative density values was approximated using a 3rd order polynomial function, in accordance with the expression for closed-cell thick edge rhombus cellular structures. All PLA samples revealed small difference on their coefficients of linear thermal expansion, irrespective of their infill densities, with a decrease of 6.34% in the lowest relative density value specimens, indicating enhanced stability within selected temperature range. Glass transition temperatures were approximately located at 65�C whereas cold-crystallization around 80�C, thus unaffected by selected process parameter.

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Improvement of structural vibration damping performance of SMCs through SMC/TPE sandwich structures

Zulueta

Burgoa

Lekube

et al. 2022

J of Applied Polymer Sci

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Sheet molding compounds (SMCs) are interesting materials for the hybrid and electric vehicle (HEV) industry due to their high stiffness‐weight ratio, ease of processing, and competitive costs. Nevertheless, HEV industry demands advanced requirements such as enhanced vibration damping capabilities and thermal fatigue resistance. In this regard, the high stiffness of SMCs usually involves poor damping capacity, so improving the vibration damping behavior on SMCs proves to be a growing research line. The hybridization of SMCs with thermoplastic elastomers (TPEs), by means of free‐layer damping structures, has been confirmed as an effective way to enhance the damping properties of SMCs, but these structures lack the sufficient temperature resistance for certain applications. In this work, the hybridization of epoxy‐based carbon fiber SMC with TPE by sandwich structures has been studied as an innovative strategy to address the enhancement of the vibration damping capacities of SMCs and assure their usage on temperature applications. The mechanical properties, vibration damping performance, and influence of temperature of the sandwich structures has been analyzed by quasi‐static 3‐point bending tests and dynamic mechanical analysis. Experimental tests show the capability of hybrid sandwich structures to boost the vibration damping efficiency of SMCs while keeping their suitability for structural applications.

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Thermoplastics and thermoplastic–matrix composites for lightweight automotive structures

Cited by 58 publications

References 17 publications

Thermoplastic Composites and Their Promising Applications in Joining and Repair Composites Structures: A Review

Thermoplastic Composites and Their Promising Applications in Joining and Repair Composites Structures: A Review

Insights into Mechanical and Thermal Properties of Additively Manufactured PLA Samples Triggered by Automotive Industry Demands

Improvement of structural vibration damping performance of SMCs through SMC/TPE sandwich structures

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