Blar i Institutt for konstruksjonsteknikk på forfatter "Yu, Haiyang"

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    • A uniform hydrogen degradation law for high strength steels 

      Yu, Haiyang; Olsen, Jim Stian; Alvaro, Antonio; Olden, Vigdis; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2016)
      The degrading effect of hydrogen on high strength steels is well recognized. The hydrogen degradation is dependent not only on hydrogen content, but also on geometric constraints or equivalently, level of stress triaxiality, ...

    • Atomic Insights into Hydrogen-Grain Boundary Interactions 

      Ding, Yu (Doctoral theses at NTNU;2023:120, Doctoral thesis, 2023)
      Derived from the most abundant element in the universe, hydrogen is the smallest element and, at the same time, a clean, mobile, and efficient energy carrier. Nowadays, hydrogen is regarded as the fuel of future and could ...

    • Cohesive zone simulation of grain size and misorientation effects on hydrogen embrittlement in nickel 

      Yu, Haiyang; Olsen, Jim Stian; Olden, Vigdis; Alvaro, Antonio; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2017)
      The size and misorientation effects on hydrogen embrittlement of a four grain nickel aggregate are studied with the help of hydrogen informed cohesive zone model. The grain misorientation angle is parameterized by fixing ...

    • The dual role of hydrogen in grain boundary mobility 

      Ding, Yu; Zhao, Kai; Lin, Meichao; Yu, Haiyang; Xiao, Senbo; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2023)
      ABSTRACT The effect of solute hydrogen on shear-coupled grain boundary (GB) migration is investigated with the dislocation-array type Σ25(430)[001] GB and a dual role of hydrogen on GB mobility is unraveled. In the low ...

    • Effects of loading path on the fracture loci in a 3D space 

      Yu, Haiyang; Olsen, Jim Stian; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2016)
      Axi-symmetric and 3D unit cell analyses with continuous non-proportional loading paths are performed to investigate the path dependence of the fracture loci in a 3D space. The loading pattern utilized is the generalization ...

    • Experimental and numerical study on hydrogen-induced failure of X65 pipeline steel 

      Lin, Meichao; Yu, Haiyang; Wang, Dong; Díaz, Andrés; Alvaro, Antonio; Olden, Vigdis; Koren, Erik Aas; Ding, Yu; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2024)
      Hydrogen-induced fracture of X65 pipeline steel under in-situ electrochemical charging is investigated by using in situ slow strain-rate tensile (SSRT) test, hydrogen diffusion test, fractography analysis, and finite element ...

    • Hydrogen embrittlement in steels: predictive models and integrity assessment 

      Lin, Meichao (Doctoral theses at NTNU;2023:123, Doctoral thesis, 2023)
      Hydrogen embrittlement (HE) is a well-recognized challenge as it can degrade the mechanical properties of most structural steels, leading to premature failure of hydrogen infrastructures. Continuum scale simulation is an ...

    • Hydrogen informed Gurson model for hydrogen embrittlement simulation 

      Yu, Haiyang; Olsen, Jim Stian; Alvaro, Antonio; qiao, lijie; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2019)
      Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the ...

    • Hydrogen trapping and diffusion in polycrystalline nickel: the spectrum of grain boundary segregation 

      Ding, Yu; Yu, Haiyang; Lin, Meichao; Ortiz, Michael; Xiao, Senbo; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2024)
      Hydrogen as an interstitial solute at grain boundaries (GBs) can have a catastrophic impact on the mechanical properties of many metals. Despite the global research effort, the underlying hydrogen-GB interactions in ...

    • Hydrogen trapping and diffusion in polycrystalline nickel: the spectrum of grain boundary segregation 

      Ding, Yu; Yu, Haiyang; Lin, Meichao; Ortiz, Michael; Xiao, Senbo; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2023)
      Hydrogen as an interstitial solute at grain boundaries (GBs) can have a catastrophic impact on the mechanical properties of many metals. Despite the global research effort, the underlying hydrogen-GB interactions in ...

    • Hydrogen-enhanced grain boundary vacancy stockpiling causes transgranular to intergranular fracture transition 

      Ding, Yu; Yu, Haiyang; Lin, Meichao; Zhao, Kai; Xiao, Senbo; Vinogradov, Alexei; Qiao, Lijie; Ortiz, Michael; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2022)
      The attention to hydrogen embrittlement (HE) has been intensified recently in the light of hydrogen as a carbon-free energy carrier. Despite worldwide research, the multifaceted HE mechanism remains a matter of debate. ...

    • Hydrogen-induced transgranular to intergranular fracture transition in bi-crystalline Nickel 

      Ding, Yu; Yu, Haiyang; Zhao, Kai; Lin, Meichao; Xiao, Senbo; Ortiz, Michael; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)
      It is known that hydrogen can influence the dislocation plasticity and fracture mode transition of metallic materials, however, the nanoscale interaction mechanism between hydrogen and grain boundary largely remains illusive. ...

    • Hydrogen-microvoid interactions at continuum scale 

      Yu, Haiyang; Olsen, Jim Stian; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2018)
      Experimentally, it has been shown that hydrogen can either enhance the internal necking failure or induce internal shearing failure of microvoids. In this study, the numerical investigation of hydrogen-microvoid interactions ...

    • Is it possible to measure the tensile strength and fracture toughness simultaneously using flattened Brazilian disk? 

      Yu, Haiyang; Andersen, Dag Herman; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)
      The Flattened Brazilian Disk test was designed for measuring both the tensile strength and fracture toughness of rocks. Using cohesive zone modelling, we found that the method is practically not suitable for extracting the ...

    • A microstructure informed and mixed-mode cohesive zone approach to simulating hydrogen embrittlement 

      Lin, Meichao; Yu, Haiyang; Wang, Xu; wang, ruijun; Ding, Yu; Alvaro, Antonio; Olden, Vigdis; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2022)
      Hydrogen induced failure under uniaxial tension is simulated in a duplex stainless steel considering microstructural feature of the material. There are three key ingredients in the modelling approach: image processing and ...

    • A microstructure informed and mixed-mode cohesive zone approach to simulating hydrogen embrittlement 

      Lin, Meichao; Yu, Haiyang; Wang, Xu; wang, ruijun; Ding, Yu; Alvaro, Antonio; Olden, Vigdis; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2022)
      Hydrogen induced failure under uniaxial tension is simulated in a duplex stainless steel considering microstructural feature of the material. There are three key ingredients in the modelling approach: image processing and ...

    • Modelling and Assessment of Hydrogen Embrittlement in Steels and Nickel Alloys 

      Yu, Haiyang (Doctoral theses at NTNU;2017:278, Doctoral thesis, 2017)

    • On determining the Poisson's ratio of viscoelastic polymer microparticles using a flat punch test 

      Yu, Haiyang; Kongsmo, Rakel; Patil, Nilesh; He, Jianying; Breiby, Dag Werner; Zhang, Zhiliang (Journal article; Peer reviewed, 2017)
      Microscopic spherical polymer particles are increasingly used in a wide range of areas, including pharmacy, physics and microelectronics. For most of the applications a precise knowledge of the mechanical properties is ...

    • A predictive model unifying hydrogen enhanced plasticity and decohesion 

      Lin, Meichao; Yu, Haiyang; Ding, Yu; Wang, Gang; Olden, Vigdis; Alvaro, Antonio; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2022)
      The detrimental effect of hydrogen on metals which manifests itself as a transition from a ductile to a brittle failure mode is, for the first time, incorporated into a unified continuum-scale predictive framework. The ...

    • Simulation of ductile-to-brittle transition combining complete Gurson model and CZM with application to hydrogen embrittlement 

      Lin, Meichao; Yu, Haiyang; Ding, Yu; Olden, Vigdis; Alvaro, Antonio; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2022)
      A general simulation framework for modelling ductile-to-brittle transition in metals is proposed. The method combines the complete Gurson model and cohesive zone model, which brings ductile and brittle fracture mechanisms ...