General influence of the environmental temperature on the matrix strength under tensile and compressive loading - A comprehensive study on high performance matrices

Drummer, Jonas; Gibhardt, Dennis; Körbelin, Johann; Fiedler, Bodo

doi:10.1016/j.compscitech.2022.109486

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…In contrast to what is evident in pure resin materials [7,14], the static strength of short-fiberglass-filled adhesives increased with decreasing degree of cure in terms of the glass transition temperature T g (Fig. 2).…”

Section: Effect Of Glass Transition Temperaturementioning

confidence: 69%

“…Taking the assumptions made by Fiedler [12] as their basis, Rosemeier and Antoniou [13] normalized the experimental data set of neat epoxy to a normalized ratio between test temperature T and degree of cure in terms of the glass transition temperature T g . Recently, Drummer et al [14] confirmed the linear relation between static strength R t and T /T g for several experimentally investigated polymers.…”

Section: Introductionmentioning

confidence: 80%

“…The experimental results for the cyclic specimens listed in Table 1 were normalized to remove effects stemming from the average test temperature T and the degree of cure, the latter being affected by process parameters such as mix ratio, exothermicity, or post-curing cycle. On the basis of the hypothesis of a linear relationship between the static strength R t and T /T g as shown in [12,14], the data points were adjusted according to…”

Section: Temperature and Degree-of-cure Correctionmentioning

confidence: 99%

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Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades

Rosemeier,

Holst,

Antoniou

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Cracks in the adhesive joints of wind turbine blades can often cause severe structural blade damage. Effects induced by the manufacturing process can have a significant impact on the cycle number toward crack initiation in the bonding material. This research compared two experimental series of neat adhesive, dog-bone-shaped specimens with different degrees of cure, fiber orientation, and porosity content, which were subjected to static and cyclic tension-tension loading. To enhance the comparability of the two coupon series, the experimental data was normalized. Normalization factors were introduced to compensate for the different properties of the two series. These factors were derived from correction models. After normalization, the S-N values of the two data series were in good agreement in the high-cycle fatigue regime. In the very-low-cycle fatigue regime, however, there was still a lack of agreement in some cases, including the static strength. Moreover, the failure mechanisms were investigated by analyzing images from the fracture surfaces and dedicated samples using X-ray microscopy. The correction models presented can be applied to estimate the design strength of adhesives. This knowledge can then be used to make rotor blade structures more resistant to crack initiation.

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Section: Effect Of Glass Transition Temperaturementioning

confidence: 69%

Section: Introductionmentioning

confidence: 80%

Section: Temperature and Degree-of-cure Correctionmentioning

confidence: 99%

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Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades

Rosemeier,

Holst,

Antoniou

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…A general trend for all configurations was an inversely proportional relationship between temperature and UCS; an increase in temperature led to a decrease in UCS. It is well known that the UCS for thermosets decreases linearly with increasing temperature [38], which seemingly is not applicable to GFRPs. The closer you get to the glass transition temperature, the greater the influence of individual temperature increases [39].…”

Section: Influence Of Temperaturementioning

confidence: 99%

Effect of Fiber Misalignment and Environmental Temperature on the Compressive Behavior of Fiber Composites

Drummer,

Tafesh,

Fiedler

2023

Polymers

Self Cite

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This experimental study investigated how defects, in particular fiber misalignment, affect the mechanical behavior of glass fiber composites (GFRP) under compressive loading. GFRP cross-plies with three different types of fiber misalignment, namely a fold, a wave, and an in-plane undulation, were fabricated using the resin transfer molding process. The compressive tests were performed at four different temperatures, in order to investigate the role of a change in the matrix properties on the strength of the composite. The experiments showed that the defects, especially at lower temperatures, had a significant impact on the mechanical properties of the composite, exceeding the proportion of the defects inside the composite. With increasing temperature, the damage mechanism changed from fiber-dominated to matrix-dominated and, in doing so, decreased the significance of fiber misalignment for the mechanical behavior.

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Hygrothermal progressive damage in open-hole compression of composite laminates with aligned carbon nanotube interlaminar reinforcement studied by X-ray micro-computed tomography

Kopp,

Ni,

Nordin

et al. 2024

Composites Part B: Engineering

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General influence of the environmental temperature on the matrix strength under tensile and compressive loading - A comprehensive study on high performance matrices

Cited by 6 publications

References 15 publications

Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades

Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades

Effect of Fiber Misalignment and Environmental Temperature on the Compressive Behavior of Fiber Composites

Hygrothermal progressive damage in open-hole compression of composite laminates with aligned carbon nanotube interlaminar reinforcement studied by X-ray micro-computed tomography

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