Creep and damage of an adhesive anchor system by accelerated testing and modeling

Yang, Lei; Chen, Fangliang; Yin, Huiming

doi:10.1177/1056789516681181

Cited by 7 publications

(3 citation statements)

References 33 publications

(30 reference statements)

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“…Dynamic mechanical analysis (DMA) provides a desirable tool to explore the viscoelastic behavior of polymers [21][22][23]. Through the DMA, it is possible to obtain the polymer features at different temperatures and frequencies in the test range [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Aging on Dynamic Mechanical Performance of a Novel Structural Adhesive

Li¹,

Gong²,

Tian³

2022

IJHT

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This study mainly evaluates the thermal aging properties of a new room temperature cured structural adhesive. Multiple adhesive specimens were thermal aged at 80℃, 100℃, 120℃ and 140℃, respectively, and subjected to the dynamic mechanical analysis (DMA) at different temperatures and frequencies. According to the results of DMA and thermodynamic analysis, the performance of the adhesive changes little after aging at 80℃, 100℃ and 120℃ for 30 days. However, the adhesive performance became unstable at 140℃, and deteriorated rapidly with the extension of aging time. Hence, this structural adhesive is suitable for the environment below 120℃. In addition, the generalized curve of the structural adhesive aging for 20 days at 100℃ was obtained, following the principles of time-temperature equivalence superposition and time-aging time equivalence superposition. The test time was shortened significantly. This research provides an accelerated characterization strategy for the long-term mechanical properties of other polymers, making it possible to obtain the generalized curve of polymers aging for a specific time at a specific temperature.

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Section: Introductionmentioning

confidence: 99%

Effect of Thermal Aging on Dynamic Mechanical Performance of a Novel Structural Adhesive

Li¹,

Gong²,

Tian³

2022

IJHT

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“…Many multiaxial fatigue life prediction models (Shang and Wang, 1998; Shang et al., 1998; Xu and Zhu, 2018; Zhu and Yu, 2019) were also proposed considering the influence of the non-proportional additional hardening. In addition, the investigations on the cyclic deformation behavior of TMF and the creep damage induced by thermal loading (Biglari and Nikbin, 2017; Holländer and Kulawinski, 2016; Kuläwinski and Weidner, 2015; Yang et al., 2017) also provide an important reference for the life prediction of multiaxial TMF.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical fatigue life prediction method for nickel-based superalloy in aeroengine turbine discs under multiaxial loading

Shang

Zhang

et al. 2019

International Journal of Damage Mechanics

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The multiaxial thermomechanical fatigue properties for nickel-based superalloy GH4169 in aeroengine turbine discs are investigated in this paper. Four types of axial–torsional thermomechanical fatigue experiments were performed to identify the cyclic deformation behavior and the damage mechanism. The experimental results showed that the creep damage can be generated under thermally in-phase loading while it can be ignored under thermally out-of-phase loading, and the responded stress increasing phenomenon, that is, non-proportional hardening, can be shown under the mechanically out-of-phase strain loading. Based on the analysis of cyclic deformation behavior and damage mechanism, a life prediction method was proposed for multiaxial thermomechanical fatigue, in which the pure fatigue damage, the creep damage, and the interaction between them were simultaneously considered. The pure fatigue damage can be calculated by the isothermal fatigue parameters corresponding to the temperature without creep; the creep damage can be calculated by the principle of subdivision, and the creep–fatigue interaction can be determined by creep damage, fatigue damage, and an interaction coefficient which is used to reflect the creep–fatigue interaction strength. The predicted results showed that the proposed method is reasonable.

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“…Moreover, based on the limit equilibrium method, Zhao et al (2016) used the silo theory and considered a sliding surface as a broken line to establish a model of limit supporting force and the corresponding formula of excavation face for shield tunnels in the upper-hard lower-soft ground. Yang et al (2017) proposed an accelerated testing and modeling method to predict the long-term performance through short-term pullout of a cylindrical anchor core by tensile loadings at different elevated temperatures. It is worth noting that their testing method is now applicable to the design and analysis of different types and sizes of adhesive anchor systems.…”

Section: Introductionmentioning

confidence: 99%

Failure modes and face instability of shallow tunnels under soft grounds

Zhang

Yang

et al. 2018

International Journal of Damage Mechanics

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For shallow tunnels under soft grounds, it is very difficult to gain a complete understanding on all the load-bearing arch effects during excavation, since such tunnels can easily deform or even collapse. Among these effects, the tunnel face stability plays the most important role and has not been understood and handled very well; therefore, the design and construction of such tunnels under soft grounds remain as a challenge. In this work, the different failure models of face instability of the shallow tunnels were established based on the upper-bound theorem of limit analysis for the formation of clayey and sandy soils, respectively, and the analytical equations for determining the limit support force for the face stability were also derived. Furthermore, the influences of various factors on the stability were analyzed and compared. For the sandy soil formation, an equivalent pressure coefficient was proposed for the tunnel faces of bolt reinforcement. Finally, taking the face stability of the shallow tunnels in sandy soils as an example, a complete numerical simulation was conducted to verify the accuracy and effectiveness of the analytical results based on the theoretical models as well as their application conditions.

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Creep and damage of an adhesive anchor system by accelerated testing and modeling

Cited by 7 publications

References 33 publications

Effect of Thermal Aging on Dynamic Mechanical Performance of a Novel Structural Adhesive

Effect of Thermal Aging on Dynamic Mechanical Performance of a Novel Structural Adhesive

Thermomechanical fatigue life prediction method for nickel-based superalloy in aeroengine turbine discs under multiaxial loading

Failure modes and face instability of shallow tunnels under soft grounds

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