Influence of fibre length and concentration on the properties of glass fibre-reinforced polypropylene: 4. Impact properties

Thomason, James; Groenewoud, W.M.

doi:10.1016/s1359-835x(96)00127-3

Cited by 273 publications

(183 citation statements)

References 25 publications

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“…where η l is the length factor in the Cox shear lag model (11,12). These values are also included in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Interfacial strength in thermoplastic composites - at last an industry friendly measurement method?

Thomason¹

2002

Composites Part A: Applied Science and Manufacturing

119

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Many elegant techniques have been developed for the quantification of composite micromechanical parameters in recent years. Unfortunately most of these techniques have found little enthusiastic support in the industrial product development environment, where they are viewed as time consuming, complex, inefficient, labour intensive, and in many cases unproven or inapplicable in 'real' systems. Despite this reaction, there is a real need for a 'user-friendly' micro-mechanics to aid the composites industry to move to the next level of development. A method for deriving values for τ (the interfacial shear strength) and η o (a fibre orientation factor) from a simple combination of the composite tensile stress-strain curve and the fibre length distribution has been available for some time. Despite the recent wealth of activity in the development of micro-mechanical test techniques there has been little follow-up on this older technique. In this paper we explore this analysis by its application to injection moulded glassfibre-reinforced thermoplastic composites produced using three matrices (polypropylene, polyamide 6,6 and polybutyleneterepthalate) and containing different levels of glass-fibre. We furthermore show how the analysis can be extended to obtain another important micromechanics parameter, σ uf -the fibre stress at composite failure. Values of τ and η o obtained using this improved version of the original model are presented and discussed.

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“…where η l is the length factor in the Cox shear lag model (11,12). These values are also included in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Interfacial strength in thermoplastic composites - at last an industry friendly measurement method?

Thomason¹

2002

Composites Part A: Applied Science and Manufacturing

119

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“…A number of authors have commented on the role of shrinkage stresses contributing to the stress transfer capability at the interface (30)(31)(32)(33). Most composite materials are shaped at elevated temperature and then cooled.…”

Section: Macromechanical Analysis Methodsmentioning

confidence: 99%

“…An exact calculation of the frictional fraction of the IFSS requires detailed knowledge of the interfacial friction and the temperature dependence of the stiffness and thermal expansion coefficient of the composite constituents and is beyond the scope of this study. However, we have estimated the magnitude and fibre content dependence of σ R in glass reinforced PP using three different models and fixed room temperature values of the required input parameters (31)(32)(33).…”

Section: Macromechanical Analysis Methodsmentioning

confidence: 99%

Micromechanical parameters from macromechanical measurements on glass reinforced polypropylene

Thomason¹

2002

Composites Science and Technology

Self Cite

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In recent years many elegant techniques have been developed for the quantification of composite micromechanical parameters. Unfortunately most of these techniques have found little enthusiastic support in the industrial product development environment. We have developed an improved method for obtaining the micromechanical parameters, interfacial shear strength, fibre orientation factor, and fibre stress at composite failure using input data from macromechanical tests. In this paper we explore this method through its application to injection moulded glass-fibre-reinforced thermoplastic composites. We have measured the mechanical properties and residual fibre length distributions of glass fibre reinforced polypropylene containing different levels of glass fibre. The level of fibre-matrix interaction in these composites was varied by the addition of maleic anhydride modified polypropylene "coupling agent". This data was used as input for the model. The trends observed for the resultant micromechanical parameters obtained by this method were in good agreement with values obtained by other methods. Given the wealth of microstructural information obtained from this macroscopic analysis and the low level of resources employed to obtain the data we believe that this method deserves further investigation as a screening tool in composite system development programmes.

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“…Hence, the suitable interface Compatibilizer agent between the PLA matrices and BC nanofibers would lead to improving BC distribution. Meanwhile, BC contents reduced surface polarity when interacting with PLA and improved reinforced efficiency [9,10].…”

Section: Introductionmentioning

confidence: 99%

Bacterial Cellulose Nanofiber Reinforced Poly (lactic acid) Nanocomposite

Dahman¹

2017

MOJPS

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Influence of fibre length and concentration on the properties of glass fibre-reinforced polypropylene: 4. Impact properties

Cited by 273 publications

References 25 publications

Interfacial strength in thermoplastic composites - at last an industry friendly measurement method?

Interfacial strength in thermoplastic composites - at last an industry friendly measurement method?

Micromechanical parameters from macromechanical measurements on glass reinforced polypropylene

Bacterial Cellulose Nanofiber Reinforced Poly (lactic acid) Nanocomposite

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