公开(公告)号：US11320353B2

公开(公告)日：2022-05-03

申请号：US17286567

申请日：2019-10-10

Applicant: East China University of Science and Technology

Inventor： Fuzhen Xuan ,  Tianye Niu ,  Jianguo Gong

IPC: G01N3/18 ,  G01N3/24 ,  G01N25/72

Abstract: A creep strength analysis and assessment method includes comparing whether a maximum value of a local strain and a membrane strain are less than a corresponding allowable strain, and if less, determining that a component is safe; otherwise, performing the following steps: performing stress linearization on a path to obtain a local primary membrane stress PL and a local primary bending stress Pb; averaging shear stress components on the path to obtain an average shear stress τm; obtaining a strength limit Smt, a time-independent minimum stress strength value Sm and a temperature- and time-dependent stress strength limit St for a given material, a design lifetime and a design temperature; comparing whether PL, PL+Pb and PL+Pb/Kt are less than Smt, KSm and St; and comparing whether τm is less than 0.6Sm and 0.6St, and if less, the component is safe, otherwise, the component is unsafe.

公开(公告)号：US20210341365A1

公开(公告)日：2021-11-04

申请号：US17286567

申请日：2019-10-10

Applicant: East China University of Science and Technology

Inventor： Fuzhen Xuan ,  Tianye Niu ,  Jianguo Gong

IPC: G01N3/18 ,  G01N3/24 ,  G01N25/72

Abstract: A creep strength analysis and assessment method includes comparing whether a maximum value of a local strain and a membrane strain are less than a corresponding allowable strain, and if less, determining that a component is safe; otherwise, performing the following steps: performing stress linearization on a path to obtain a local primary membrane stress PL and a local primary bending stress Pb; averaging shear stress components on the path to obtain an average shear stress τm; obtaining a strength limit Smt, a time-independent minimum stress strength value Sm and a temperature- and time-dependent stress strength limit St for a given material, a design lifetime and a design temperature; comparing whether PL, PL+Pb and PL+Pb/Kt are less than Smt, KSm and St; and comparing whether τm is less than 0.6Sm and 0.6St, and if less, the component is safe, otherwise, the component is unsafe.