financially supported by the National Natural Science Foundation of China(Nos.41972270,52076198);the Key Research and Development Plan of Henan Province(No.182102210014);the Excellent Youth Foundation of Henan Scientific Committee(No.222300420078);the Youth Talent Promotion Project of Henan Province(No.2022HYTP019);the Open Foundation of State Key Laboratory of Shield Machine and Boring Technology(No.SKLST-2019-K06)。
To reduce the uncertainty associated with the traditional definition of tunnel boring machine(TBM)utilization(U)and achieve an effective indicator of TBM performance,a new performance indicator called rock mass-relate...
Supported by the National Key R&D Program of China(2023YFB3709602,2023YFB3709603);National Natural Science Foundation of China(12372141);the Key R&D Program in Shaanxi Province(2024GH-ZDXM-27).
Sandwich structures are vulnerable to multi-point impacts,and such impacts can result in a reduction in residual strength even catastrophic accident.Therefore,the multi-point impact behaviors of PMI foam sandwich stru...