Fracture Behavior of Rubber-Modified High-Performance Epoxies

Sue, Hung‐Jue; Garcia‐Meitin, E. I.; Pickelman, Dale M.

doi:10.1201/9781003067399-5

Cited by 2 publications

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“…Due to the induced toughness, the stress on the bonded material is divided on larger surfaces. The rubber particles cavitate and trigger shear deformation in the matrix or the epoxy [55][56][57], resulting in substrate failure as shown in Figure 6f,g. Whereas, the use of usual high mechanical brittle adhesive layers, leads to a more adhesive failure, induced by high peek stresses at the boarders of the composites (see Figure 6a,b,d,e).…”

Section: Resultsmentioning

confidence: 99%

Efficiency of CFRP Strengthening Measures for Reinforced Concrete Structural Members Using Toughened Epoxies

Achillopoulou,

Kosta,

Stamataki

et al. 2024

Construction Materials

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This paper aims to investigate the interface efficiency of Carbon Fiber Reinforced Polymers (CFRP) adhesively bonded on concrete, a commonly used retrofitting measure applied for enhancing the deformability and strength of decaying structures or existing ones with low capacity. The efficiency quantification is expressed with the Interface Capacity Index (IC). The index correlates the thickness and strength of each layer of the strengthening system and accounts for the transferred loads (ICL) and the strain distribution that causes the failure propagation on the concrete substrate (ICfp). The investigation focuses on different CFRP strengthening schemes (laminated fabrics, prefabricated plates, Near Surface Mounted bars-NSM) applied to concrete substrates using different adhesive layers. Two cases were studied for different levels of concrete’s integrity: (a) healthy and (b) containing corrosion products. The experimental results were used to calibrate the numerical models and to evaluate the effects of different strengthening strategies. The results show the tendency of the strengthening systems to shift the interface performance from fully elastic to non-linear. Further, the quantification of the efficiency of retrofitting can be addressed by accounting for the mechanical and geometrical properties at the interface level, representing different failure modes and integration levels.

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Section: Resultsmentioning

confidence: 99%

Efficiency of CFRP Strengthening Measures for Reinforced Concrete Structural Members Using Toughened Epoxies

Achillopoulou,

Kosta,

Stamataki

et al. 2024

Construction Materials

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“…For this purpose, a common toughening mechanism such as an addition of the phase separating additives to the epoxy system can be followed. For example, the addition of thermoplastic elastomer has been shown to offer effective toughening of epoxy resin materials [3]. However, the addition of more rubber into the epoxy resin can give rise to processing difficulties and the drop-in glass transition temperature (Tg) and elastic modulus of the thermoset [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties of triblock copolymer modified epoxy resins

Khatiwada¹,

Thomas²,

Saiter³

et al. 2018

BIBECHANA

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We investigate the ways of improving thermal and mechanical properties of diglycidyl ether of bisphenol-A (DGEBA) based thermoset resin using diaminodiphenylsulphone (DDS) as hardener and using epoxidized polystyrene/polybutadiene-based triblock copolymers as modifier. The epoxidation was performed. The targeted chemical modification using meta-chloroperoxybenzoic acid (m-CPBA) of the copolymer was performed whereby the epoxidation of the butadiene chains mainly took place at 1,4 linkages. The modification copolymer was found to contribute in enhancing the mechanical performance of the blends with epoxy resin. The results indicated the formation of nanostructured morphology in the blends attributable to their enhanced impact strength.BIBECHANA 16 (2019) 196-203

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Fracture Behavior of Rubber-Modified High-Performance Epoxies

Cited by 2 publications

References 0 publications

Efficiency of CFRP Strengthening Measures for Reinforced Concrete Structural Members Using Toughened Epoxies

Efficiency of CFRP Strengthening Measures for Reinforced Concrete Structural Members Using Toughened Epoxies

Mechanical and thermal properties of triblock copolymer modified epoxy resins

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