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公开(公告)号：US11965861B2
公开(公告)日：2024-04-23
申请号：US17743369
申请日：2022-05-12
发明人： Zhigang Sun , Xu Zhao , Yingdong Song , Xuming Niu , Yaning Chang , Qiuhong Peng
CPC分类号： G01N3/18 , G01N3/02 , G01N2203/0017 , G01N2203/0048 , G01N2203/0071 , G01N2203/0073 , G01N2203/0226
摘要： Disclosed is an equivalent acceleration method of creep loads based on a consistent failure mode. The equivalent acceleration method includes obtaining corresponding tensile strengths; obtaining corresponding creep rupture time; establishing rupture time law, minimum creep rate law and rupture strain law; calculating the value of parameter p in creep damage accumulation model; and dividing the failure mode consistency interval of creep load under variable temperature and variable load. The damage caused by the creep load in the failure mode consistency interval is calculated by using the multi-grade variable temperature and variable load creep nonlinear damage accumulation model, the damage is accelerated to the maximum creep load state in the failure mode consistency interval according to the principle of damage equivalence, and finally the equivalent acceleration of creep load is realized.
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公开(公告)号：US20220309213A1
公开(公告)日：2022-09-29
申请号：US17603281
申请日：2021-07-08
发明人： Xiguang Gao , Chenyang Liu , Yingdong Song , Sheng Zhang , Hongnian Dong , Guoqiang Yu , Chengqian Dong , Chao You , Lu Zhang
IPC分类号： G06F30/23
摘要： The present disclosure provides an optimized designing method for a laminate preform of a ceramic matrix composite e. With overall consideration of a strength requirement of a component, a geometric shape and properties of the laminate preform, the method includes: optimizing, based on a corresponding mechanical formula, a fiber volume fraction of each laminate constituting the preform and a fiber direction in the laminate, and selecting a preferred microscopic structure for each laminate, thereby taking full advantage of material performance. The method is applicable for optimized design of various components of the ceramic matrix composite.
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3.发明授权公开(公告)号：US11650143B2
公开(公告)日：2023-05-16
申请号：US17733853
申请日：2022-04-29
发明人： Yingdong Song , Xu Zhao , Zhigang Sun , Xuming Niu , Yaning Chang , Qiuhong Peng
CPC分类号： G01N3/18 , G01N3/36 , G01N2203/0017 , G01N2203/0048 , G01N2203/0071 , G01N2203/0073 , G01N2203/0226 , G01N2203/0676
摘要： Disclosed is a method for compiling an equivalent acceleration spectrum of creep under variable temperatures and loads. The method includes following steps: respectively carrying out a material high-temperature tensile test, material high-temperature creep tests and creep tests under two-stage variable temperatures and loads, and calculating values of a parameter p in a creep damage accumulation model under two-stage variable temperatures and loads; based on a nonlinear damage accumulation model under multi-stage variable temperatures and loads, calculating a damage D caused by a multi-stage variable temperatures and loads creep load spectrum by utilizing values of parameter p; based on the principle of consistency of damage D, transforming the multi-stage variable temperatures and loads creep load spectrum into an equivalent acceleration spectrum of a first-order maximum creep load, and finally compiling the equivalent acceleration spectrum of creep under variable temperatures and loads.
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公开(公告)号：US20220277112A1
公开(公告)日：2022-09-01
申请号：US17625772
申请日：2020-07-10
发明人： Yingdong Song , Xiguang Gao , Guoqiang Yu , Baocheng Zhu , Sheng Zhang , Hongnian Dong
IPC分类号： G06F30/17
摘要： A structural integration design method for a ceramic matrix composite bolt preform is provided, which includes: preform modeling; structure modeling; deformation and failure calculation. The method builds different small composites inside the bolt according to actual mesostructures of the ceramic matrix composites, which can realize structurally macroscopic failures caused by mesoscopic failures inside the small composites. The screw threads that are built by the method can reflect a failure form of thread teeth, and the influence of complex stress conditions of the screw threads on the failure form of the screw fracture is also considered, which improves the prediction accuracy of the strength of the ceramic matrix composite bolt. The method builds a structure integrated model, which has a certain structure, for a ceramic matrix composite preform according to the actual size and shape of the structure. The model can have high accuracy, accurately reflect various components of the material, and give macroscopic and mesoscopic structural parameters, so as to facilitate the machining of preparation personnel.
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公开(公告)号：US12060300B2
公开(公告)日：2024-08-13
申请号：US17586384
申请日：2022-01-27
发明人： Xiguang Gao , Yingdong Song , Guoqiang Yu , Sheng Zhang , Xiaoting Shi , Zheng Ni
CPC分类号： C04B35/52 , C03C10/0036 , C04B35/80 , G01N33/388 , C03C2214/20
摘要： A method is provided for calculating gaseous diffusion and oxidation evolution of a ceramic matrix composite (CMC) structure, which includes determining temperature and load distribution in a structural member; determining matrix crack distribution in the structure; establishing an equivalent diffusion coefficient model of a fiber bundle scale to predict a gas flow channel in a fiber bundle: averaging a total amount of gaseous diffusion in the channel to establish the equivalent diffusion coefficient model of the fiber bundle composite scale related to the matrix crack distribution; establishing a representative volume element (RVE) model; establishing an equivalent diffusion coefficient model of a RVE scale; calculating the distribution of the gas concentration and oxidation products in the structure; calculating a growth thickness of an oxide at cracks and pores in each element; and updating sealing conditions of the gas channel, and calculating a new equivalent diffusion coefficient field and the distribution of the oxidation products again.
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公开(公告)号：US20230038640A1
公开(公告)日：2023-02-09
申请号：US17956876
申请日：2022-09-30
发明人： Zhigang Sun , Yingdong Song , Rutao Zhao , Xuming Niu , Yaning Chang
IPC分类号： G06F30/20
摘要： The present disclosure discloses a method for calculating the service life of a material under the action of a thermal shock load. The method includes steps of obtaining test results at different thermal shock temperatures and a thermal shock cycle number according to a thermal shock test, and calculating a temperature rise rate to temperature drop rate ratio Rv; calculating a corresponding stress intensity factor ΔK according to a crack length a measured in the test; calculating a thermal stress σ at the notch and a notch stress concentration coefficient kt of the test specimen; calculating a stress intensity factor threshold ΔKth according to the crack length a measured in the test; and substituting the obtained the stress intensity factor ΔK, stress intensity factor threshold ΔKth and temperature rise rate to temperature drop rate ratio Rv into a thermal fatigue crack growth model.
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公开(公告)号：US11644382B2
公开(公告)日：2023-05-09
申请号：US17875447
申请日：2022-07-28
发明人： Xiguang Gao , Guoqiang Yu , Yingdong Song , Fangxiao Song , Chuyang Xie , Yunfa Jia , Jinkang Du
摘要： A high-temperature biaxial strength tester for a CMC turbine vane includes a test stand, a thermal insulation box, a vane fixture, a biaxial loading device, thermocouples, a multi-channel thermometer, quartz lamps, a digital image correlation (DIC) system, and a cooling circulation system. The biaxial loading device includes two loading mechanisms arranged at 90° to each other. Each of the two loading mechanisms includes an electric cylinder and a ceramic push rod. One end of the ceramic push rod is connected to the electric cylinder, and the other end of the ceramic push rod extends into the thermal insulation box to contact an outer platform of the CMC turbine vane. The electric cylinder is provided with a load-displacement sensor. The thermocouples are arranged on the thermal insulation box. The quartz lamps are arranged inside the thermal insulation box. The multi-channel thermometer is connected to the thermocouples.
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