A peridynamic elasto-plastic damage model for ion-irradiated materials

Nowak, Marcin; Mulewska, K.; Azarov, Alexander; Kurpaska, Ł.; Ustrzycka, Aneta

doi:10.1016/j.ijmecsci.2022.107806

Cited by 17 publications

(8 citation statements)

References 51 publications

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“…When a beryllium target is bombarded with the 8 MeV proton beam, high-flux neutrons are produced and transported to the experiment terminals. These experiment terminals consist of four platforms designed for nuclear physics [1], boron neutron capture therapy (BNCT) [2], and material irradiation [3], respectively. In PAFA, both the RFQ and DTL will operate at a frequency of 200 MHz and under CW mode.…”

Section: Pafamentioning

confidence: 99%

Beam dynamics and cavity design of an 8 MeV CW IH-DTL for SYSU-PAFA

Wang

et al. 2023

J. Inst.

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As a part of the Particle Accelerator Facility at Sun Yat-sen University (SYSU-PAFA), a 200 MHz drift tube linac (DTL), operating under continuous wave (CW) mode, has been designed. PAFA-DTL is expected to accelerate a 10 mA proton beam from 2.5 MeV to 8 MeV. Using the alternative phase focusing (APF) beam dynamics scheme, a compact cell array has been designed and optimized in order to limit the cavity length to 2.4 m with high acceleration efficiency. As a result, PAFA-DTL contains 31 acceleration cells with beam transmission efficiency reaches 100%, and better output beam quality is obtained by optimizing the input beam parameters. Interdigital H-mode (IH) structure is utilized in the PAFA-DTL cavity, which has achieved a high unloaded quality factor of 13987. Additionally, to ensure the stability of PAFA-DTL under CW operation, a low Kilpatrick factor (Kp) of 1.42 is obtained by adjusting the blending radius of the drift tubes (DTs) to reduce the risk of RF breakdown. The gap voltage distribution through RF design is compared with that from the beam dynamics, and the maximum absolute value of deviation is only 0.73%. In this paper, the detailed design and results of PAFA-DTL, including beam dynamics and RF design, are presented.

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Section: Pafamentioning

confidence: 99%

Beam dynamics and cavity design of an 8 MeV CW IH-DTL for SYSU-PAFA

Wang

et al. 2023

J. Inst.

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“…There were so far many efforts to take into account the influence of irradation defects on the mechanical properties of metals and alloys in macroscopic phenomenological models, cf. e. g. [35][36][37][38][39][40]. However, as could be seen from the previous paragraphs, the phenomena related to radiation-induced microstructure changes appear at different time and length scales and therefore the multiscale modelling approach is the most appropriate in addressing them [18,23].…”

Section: Modelling Irradiation Effectsmentioning

confidence: 99%

“…Since the thin surface of a material cannot be mechanically tested using conventional mechanical testing, typically the instrumented (nano)indentation test (cf. e. g. [39,40,[77][78][79][80][81][82]) is used in order to obtain the properties of the irradiated layer. As it was already mentioned in this review, the basic mechanistic effect of irradiation is irradiation hardening.…”

Section: Nanoindentationmentioning

confidence: 99%

Modelling Irradiation Effects in Metallic Materials using the Crystal Plasticity Theory

Frydrych¹

2023

Preprint

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The review starts by highlighting the significance of nuclear power plants in contemporary world, especially its indispensable role in the global efforts to reduce CO2 emissions. Then, it describes the impact of irradiation on microstructure and mechanical properties of reactor structural materials. The main part provides the reader with a thorough overview of crystal plasticity models developed to address the irradiation effects so far. All three groups of most important materials are included. Namely, the Zr alloys used for fuel cladding, austenitic stainless steels used for reactor internals and ferritic steels used for reactor pressure vessel. Other materials, especially those considered for construction of future fission and fusion nuclear power plants, are also mentioned. The review pays also special attention to ion implantation and instrumented nanoindentation which are a common way to substitute costly and time-consuming neutron irradiation campaigns.

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“…Each matrix block Bi,j represents the effect of the j-th layer on the i-th layer. The structure of Bi,j is a block-banded-block matrix with the same form as (16). A has a stiffness matrix with a block-banded-blockbanded-block structure, as illustrated in Fig.…”

Section: Analysis Ofmentioning

confidence: 99%

A fast computational framework for the linear bond-based peridynamic model

Liu,

Tian,

Don

et al. 2023

Preprint

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The non-locality property of peridynamic poses significant computational challenges, especially for problems with discontinuous solutions (e.g., cracks). An efficient matrix-structure-based fast (MSBF) algorithm is proposed for the meshfree method (MF) in solving the linearized bond-based peridynamic models on a rectangular Cartesian computational domain with a uniform mesh. Taking full advantage of the intrinsic Teoplitz structure of the block-diagonal stiffness matrix, the fast Fourier transform (FFT) algorithm is utilized to significantly reduce the number of floating point operations (FLOPS) count to achieve a substantial speed up at fine mesh resolutions than the classical matrix-vector multiplication (MVMP) algorithm. Both methods are applied to multi-dimensional static and dynamic problems, including general boundary conditions and unsteady crack propagation, with good results. The MF-MSBF algorithm demonstrates its substantial computational efficiency with greatly reduced CPU times and smaller memory footprint over the MF-MVMP algorithm in multi-dimensional peridynamic simulations with fine meshes.

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A peridynamic elasto-plastic damage model for ion-irradiated materials

Cited by 17 publications

References 51 publications

Beam dynamics and cavity design of an 8 MeV CW IH-DTL for SYSU-PAFA

Beam dynamics and cavity design of an 8 MeV CW IH-DTL for SYSU-PAFA

Modelling Irradiation Effects in Metallic Materials using the Crystal Plasticity Theory

A fast computational framework for the linear bond-based peridynamic model

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