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公开(公告)号：US20230103274A9
公开(公告)日：2023-03-30
申请号：US17421929
申请日：2019-10-31
Inventor： Runzi Wang , Xiancheng Zhang , Sujuan Guo , Guangjian Yuan , Xumin Zhu , Shantung Tu
Abstract: The present invention discloses a multiaxial creep-fatigue prediction method based on ABAQUS, which comprises: S1: establishing an ABAQUS finite element model, and defining the viscoplastic constitutive equation of the material to be tested by means of the user subroutine UMAT; S2: determining the model parameters required by the viscoplastic constitutive equation; S3: establishing the fatigue damage calculation model and creep damage calculation model of the multiaxial stress-strain state of the material to be tested; S4: establishing an ABAQUS finite element model under the multiaxial stress-strain state, and calculating the stress-strain tensor of each cycle based on the defined viscoplastic constitutive equation and the model parameters; S5: calculating the equivalent stress and equivalent plastic strain by means of the user subroutine USDFLD, and superimposing the fatigue damage and creep damage of each cycle according to the linear cumulative damage criterion to obtain the crack initiation life of the material to be tested based on the fatigue damage calculation model and creep damage calculation model in combination with the stress-strain tensor.
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公开(公告)号：US20220057194A1
公开(公告)日：2022-02-24
申请号：US17312543
申请日：2019-03-28
Inventor： Xiancheng Zhang , Shuang Liu , Shulei Yao , Xumin Zhu , Kaiming Zhang , Yixin Liu , Yunfei Jia , Shantung Tu
Abstract: The present application provides an on-machine point cloud detection and compensation method for processing complex surfaces, which comprises: step S1, installing a detecting and scanning actuator on an ultrasonic rolling machine tool; step S2, installing a processed workpiece on the chuck which is scanned by the detecting and scanning actuator to obtain the point cloud data of the workpiece in a coordinate system of detecting and scanning actuator, which is converted into the point cloud data of the workpiece in a coordinate system of machine tool; step S3, processing the point cloud data of the workpiece in the coordinate system of machine tool; step S4, obtaining and compensating the shape error feature of the workpiece according to theoretical design data of the processed workpiece and processed point cloud data of the workpiece in the coordinate system of machine tool. The accuracy and efficiency of complex surface strengthening is improved in the present application.
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公开(公告)号：US20220026326A1
公开(公告)日：2022-01-27
申请号：US17421929
申请日：2019-10-31
Inventor： Runzi Wang , Xiancheng Zhang , Sujuan Guo , Guangjian Yuan , Xumin Zhu , Shantung Tu
Abstract: The present invention discloses a multiaxial creep-fatigue prediction method based on ABAQUS, which comprises: S1: establishing an ABAQUS finite element model, and defining the viscoplastic constitutive equation of the material to be tested by means of the user subroutine UMAT; S2: determining the model parameters required by the viscoplastic constitutive equation; S3: establishing the fatigue damage calculation model and creep damage calculation model of the multiaxial stress-strain state of the material to be tested; S4: establishing an ABAQUS finite element model under the multiaxial stress-strain state, and calculating the stress-strain tensor of each cycle based on the defined viscoplastic constitutive equation and the model parameters; S5: calculating the equivalent stress and equivalent plastic strain by means of the user subroutine USDFLD, and superimposing the fatigue damage and creep damage of each cycle according to the linear cumulative damage criterion to obtain the crack initiation life of the material to be tested based on the fatigue damage calculation model and creep damage calculation model in combination with the stress-strain tensor.
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公开(公告)号：US12061078B2
公开(公告)日：2024-08-13
申请号：US17312543
申请日：2019-03-28
Inventor： Xiancheng Zhang , Shuang Liu , Shulei Yao , Xumin Zhu , Kaiming Zhang , Yixin Liu , Yunfei Jia , Shantung Tu
CPC classification number: G01B11/24 , B23Q17/098 , B23Q17/2457 , G01B11/002
Abstract: The present application provides an on-machine point cloud detection and compensation method for processing complex surfaces, which comprises: step S1, installing a detecting and scanning actuator on an ultrasonic rolling machine tool; step S2, installing a processed workpiece on the chuck which is scanned by the detecting and scanning actuator to obtain the point cloud data of the workpiece in a coordinate system of detecting and scanning actuator, which is converted into the point cloud data of the workpiece in a coordinate system of machine tool; step S3, processing the point cloud data of the workpiece in the coordinate system of machine tool; step S4, obtaining and compensating the shape error feature of the workpiece according to theoretical design data of the processed workpiece and processed point cloud data of the workpiece in the coordinate system of machine tool. The accuracy and efficiency of complex surface strengthening is improved in the present application.
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