Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Ferdous, Wahid; Maranan, Ginghis B.; Sharma, S. K.; Karunasena, Warna; Bai, Yu

doi:10.1016/j.compstruct.2017.04.040

Cited by 35 publications

(5 citation statements)

References 27 publications

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“…The sensitivity of mechanical and physical properties of particulate-filled epoxy based resin to elevated temperatures is one of the major concerns in civil engineering and construction applications [16]. The continuous service temperature is generally known to be in the range of sub-ambient to 120°C [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of elevated in-service temperature on the mechanical properties and microstructure of particulate-filled epoxy polymers

Khotbehsara

Manalo

Aravinthan

et al. 2019

Polymer Degradation and Stability

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In civil engineering applications, epoxy-based polymers are subject to different environmental conditions including in-service temperature, which might accelerate their degradation and limit their application ranges. Recently, different particulate fillers were introduced to enhance the mechanical properties and reduce the cost of epoxy-based polymers. This paper addresses the effect of in-service elevated temperature (from room temperature to 80 o C) in particulate-filled epoxy based resin containing up to 60% by volume of fire retardant and fly ash fillers through a deep understanding of the microstructure and analysis of their mechanistic response. An improvement in the retention of mechanical properties at in-service elevated temperature was achieved by increasing the percentages of fillers. The retention of compressive and split tensile strength at 80 o C for the mix containing 60% fillers was 72% and 52%, respectively, which was significantly higher than the neat epoxy. Thermo-dynamic analysis showed an increase in glass transition temperature with the inclusion of fillers, while these mixes also experienced less weight loss compared to neat epoxy, indicating better thermal stability. Scanning electron microscopy images showed the formation of dense microstructures for particulate-filled epoxy based resin at elevated temperatures. This indicates that the particulate filled epoxy resin exhibits better engineering

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Section: Introductionmentioning

confidence: 99%

Effect of elevated in-service temperature on the mechanical properties and microstructure of particulate-filled epoxy polymers

Khotbehsara

Manalo

Aravinthan

et al. 2019

Polymer Degradation and Stability

Self Cite

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“…Effect of temperature on resin matrix. It is well known that resin matrix plays a significant role in the tensile responses and failure modes of fiber reinforcement composites at different temperature 15,38 . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Tensile behaviors of layer-to-layer 2.5D angle-interlock woven composites with/without a center hole at various temperatures

Song

Wen

Cui

et al. 2020

Sci Rep

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The temperature-dependent mechanical behaviors of open-hole composite plates are essential for composite design and structures. Here, tensile experiments of shallow straight-link-shaped 2.5D woven composites (abbr. 2.5DWC) with/without a center hole are first conducted at different temperatures (20 °C, 180 °C and 240 °C). Failure modes are examined by scanning electron microscope (SEM). Thermal property of QY8911-IV resin is investigated by DMA analysis. It is noted for samples without the center hole that with the increase of temperature, the tensile stress–strain curves exhibit a linear response until that a slight nonlinearity at the end stage. The strength retention rates at 180 °C and 240 °C are totally equal. For the open-hole samples, it is interestingly found that the strength retention rates are higher than that of samples without the hole at 180 °C, resulting from the stress concentration accommodation and fiber-dominated failure mode. Even at 240 °C, there is no necking phenomenon for all the failed samples, but more broom-like damage extent is observed in the cross-section. Due to the primary load-bearing warp yarns and hole-edge stress concentration, obvious pull-out warp yarns emerge near the hole edge.

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“…The mesh consists of 1 mm C3D8R elements starting from the clamping and oriented along the radius. All parameters required for the GFRP material are selected based on the results of own tests or comparable studies [42,46]. For the evaluation of the FE analysis, the failure index matrix (FIM) is analyzed because splitting cracks initiate the final failure in the UD laminate.…”

Section: Fatigue Specimen Designmentioning

confidence: 99%

Influence of Sizing Aging on the Strength and Fatigue Life of Composites Using a New Test Method and Tailored Fiber Pre-Treatment: A Comprehensive Analysis

et al. 2023

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Given the time-consuming and complex nature associated with the aging of composites, a novel fabric pre-aging method was developed and evaluated for static and fatigue testing. It allows for investigating sizing and interphase-related aging effects. This fast method is independent of the diffusion processes and the composites’ thickness. Moreover, the new methodology offers enhanced analysis of the sizing, interphase, and fiber-related degradation of composites without aging them by conventional accelerated procedures or under severe maritime environments. For validation purposes, fiber bundle, longitudinal, and transverse tensile tests were performed with five different glass fiber inputs. Significant differences in the durability of composites were found for pre-aging and classical aging, respectively. The impacts of degradation of the single constituents on the fatigue life are identified by cyclic testing of untreated, pre-aged, and wet-aged composites. Here, it is evident that the interphase strength is likewise essential for the tension-tension fatigue performance of unidirectional composites, as is the fiber strength itself. In summary, the presented method provides industry and academia with an additional opportunity to examine the durability of different fibers, sizings, and composites for design purposes following a reasonable methodology.

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Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Cited by 35 publications

References 27 publications

Effect of elevated in-service temperature on the mechanical properties and microstructure of particulate-filled epoxy polymers

Effect of elevated in-service temperature on the mechanical properties and microstructure of particulate-filled epoxy polymers

Tensile behaviors of layer-to-layer 2.5D angle-interlock woven composites with/without a center hole at various temperatures

Influence of Sizing Aging on the Strength and Fatigue Life of Composites Using a New Test Method and Tailored Fiber Pre-Treatment: A Comprehensive Analysis

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