Experimental and numerical investigation of the residual strength of steel-composites bonded joints: Effect of media and aging condition

Sugiman, Sugiman; Setyawan, Paryanto Dwi; Salman, Salman; Ahmad, Hishamuddin

doi:10.1016/j.compositesb.2019.106977

Cited by 9 publications

(9 citation statements)

References 34 publications

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“…A high aspect ratio of nanoparticles is better than microparticles in decreasing the water uptake and diffusivity due to the increase in tortuosity path of water diffusion into the epoxy [4][5][6][7]. Water diffused faster when it came from the longitudinal direction of the reinforcement orientation than from the transverse direction of reinforcement orientation, but the equilibrium water uptake was not different significantly [7][8][9]. The phenomena occurred because, in the longitudinal direction, water can diffuse through both the matrix and the interface of reinforcementmatrix.…”

Section: Introductionmentioning

confidence: 99%

Effects of volume fraction on water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water

Sugiman

Salman

Maryudi

2020

Materials Today Communications

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The paper presents water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water, namely Portland cement, fly ash, and calcium carbonate (CaCO 3) particles. Portland cement and CaCO 3, respectively have the highest and the lowest water reactivity. The filler volume fraction was ranging from 0 to 25 %. The results showed that for the reactive filler, with the increase of volume fraction, the water uptake increased and behaved as non-Fickian, whereas for the less reactive filler, the water uptake decreased and behaved as pseudo-Fickian. In dry condition, with the increase of volume fraction, the elastic modulus and tensile strength increased and tended to decrease, respectively, regardless of the filler type. However, in wet condition, the positive effect of filler on the elastic modulus diminished due to excessive plasticization of the matrix, and the reduction of elastic modulus of the most reactive filler is the lowest.

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Section: Introductionmentioning

confidence: 99%

Effects of volume fraction on water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water

Sugiman

Salman

Maryudi

2020

Materials Today Communications

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“…It was attributed to the water plasticizing effect which has been reported that water plasticizing has a detrimental effect on the properties of adhesive. 41 The modulus and tensile The difference between the two types of specimens was also presented in the SEM results. The rougher fracture surface could be found for specimen BA-T-SW5.…”

Section: Effect Of Seawater Aging On the Adhesive Propertiesmentioning

confidence: 99%

“…This is different from the results reported by previous researches. [36][37][38][39][40][41] It is worth noting that the research described above still focuses on the adhesively bonded structures composed of traditional metals (steel, aluminum, etc.) and composites.…”

Section: Introductionmentioning

confidence: 99%

Fracture durability of composite–titanium adhesively bonded structures exposed to seawater environment

Wang,

Gao,

et al. 2023

Fatigue Fract Eng Mat Struct

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In this paper, the fracture durability of composite–titanium adhesively bonded structures exposed to seawater environment was studied experimentally and numerically. The specimens were immersed in artificial seawater at 45°C for different exposure times. The results show that the tensile strength of the specimen aging for 130 days degraded by nearly 55.6%, and the degradation of the mechanical properties of adhesive was not only affected by the moisture but also showed a certain relationship with aging time. Under the condition of saturated moisture, the tensile strength of the specimen still decreased with the increase of aging time. The simulated moisture results of the aging fracture specimen indicate that the moisture of the boundary region of the adhesive layer was mainly absorbed from the adhesive itself, while the moisture of the central region was dependent on the moisture absorption of the composite adherend. Moreover, the moisture absorption of the pre‐crack tip adhesive resulted in different load responses and fracture modes of the aging fracture specimens. Consequently, the fracture toughness of the DCB and ENF specimens aging for 180 days degraded by nearly 66.4% and 33.0%, respectively.

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“…In numerical analysis, the water absorption distribution of the adhesive layer is calculated using material diffusion analysis based on Fick's law of diffusion 21–23 . Furthermore, the strength and toughness are calculated by inputting the changes in the physical property according to the amount of moisture absorption 12,24–33 . In some studies, the amount of water absorption has been experimentally investigated by monitoring the changes in the strain, 22,34 which are induced by the swelling associated with moisture absorption, and changes in the modulus, 35 or by using electrochemical impedance spectroscopy 36 .…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23] Furthermore, the strength and toughness are calculated by inputting the changes in the physical property according to the amount of moisture absorption. 12,[24][25][26][27][28][29][30][31][32][33] In some studies, the amount of water absorption has been experimentally investigated by monitoring the changes in the strain, 22,34 which are induced by the swelling associated with moisture absorption, and changes in the modulus, 35 or by using electrochemical impedance spectroscopy. 36 Fourier-transform infrared (FTIR)-transmission microscopy has been used to measure the diffusion of D 2 O in the adhesive layer, 37,38 F I G U R E 1 Schematic of the (a) open-faced specimen and (b) closed specimen.…”

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confidence: 99%

Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

Han

Sekiguchi

Shimamoto

et al. 2023

J of Applied Polymer Sci

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Adhesive joints are degraded when exposed to moist conditions, making it essential to assess the permeation distance of absorbed moisture. However, monitoring the water penetration in the adhesive layer is challenging because the adhesive layer is sandwiched between the adherends. To overcome this difficulty, we proposed a new monitoring system using fiber-type near-infrared spectroscopy (NIRS), and the moisture distribution at the joint was successfully observed by introducing quartz glass as one side of the substrate. First, the change in the absorbance spectra owing to water absorption by an epoxy adhesive was investigated by immersing epoxy-coated aluminum alloy plates in temperature-controlled water. It was found that the water content can be evaluated by monitoring the change in the peak intensity appearing around 1900-1950 nm. Next, water penetration into the adhesive layer sandwiched between the quartz glass and aluminum alloy was investigated by scanning the surface. The water permeation distance was found to change with temperature. Under the 23 C immersion condition, approximately 2.5 mm of water penetration was observed after 8 weeks. Because the simulation results using Fick's law of diffusion showed similar trends, it was experimentally confirmed that Fickian diffusion dominates the water distribution in the adhesive layer.

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Experimental and numerical investigation of the residual strength of steel-composites bonded joints: Effect of media and aging condition

Cited by 9 publications

References 34 publications

Effects of volume fraction on water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water

Effects of volume fraction on water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water

Fracture durability of composite–titanium adhesively bonded structures exposed to seawater environment

Experimental measurement of moisture distribution in the adhesive layer using near‐infrared spectroscopy

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