Results 81 to 90 of about 26,318 (151)

Real Options Valuation of Abandoned Farmland [PDF]

I investigate the decision-making process of an owner of abandoned farmland that is currently restricted to agricultural use but will be available for nonagricultural use in the future.
Michi Nishihara
core  

Hybrid or Electric Vehicles? A Real Options Perspective [PDF]

This paper investigates the decision of an automaker concerning the alternative promotion of a hybrid vehicle (HV) and a full electric vehicle (EV). We evaluate the HV project by considering the option to change promotion from the HV to the EV in the ...
Michi NISHIHARA
core  

Creep damage constitutive model of rock based on the mechanisms of crack-initiated damage and extended damage

Underground Space
Since the classical element model cannot describe the nonlinear characteristics of rock during the entire compressive creep process, nonlinear elements and creep damage are generally introduced in the model to resolve this issue.
Tianbin Li, Chao Chen, Feng Peng, Chunchi Ma, Mou Li, Yixiang Wang   +5 more
doaj   +1 more source

Fractional Order Analysis of Creep Characteristics of Sandstone with Multiscale Damage

Mathematics
Deep mining is often accompanied by complex geological conditions, which can cause damage to the coal seam roof surrounding rock, thereby reducing its safety and stability.
Shuai Yang, Wentao Zhou, Senlin Xie, Bo Lei, Hongchen Song   +4 more
doaj   +1 more source

Study on the fractional creep model of roadway filling paste under the coupling effect of pore water pressure and stress

Heliyon
Filling paste in deep roadways is significantly affected by groundwater, especially high pore water pressure, which increases the complexity and variability of the filling paste's mechanical properties.
Hongmiao Lv
doaj   +1 more source

Creep Deformation Characteristics and Damage Unified Creep Constitutive Model of Undisturbed Structural Loess Under Different Consolidation Conditions

Buildings
In the loess-filling project, the original structural loess under the filling will produce creep deformation under the isometric consolidation stress state, affecting the upper building’s safe construction and later operation.
Yuan Yuan, Hui-Mei Zhang, Zhao-Yuan Gou, Pan Wang   +3 more
doaj   +1 more source

Creep damage model of deep granite under coupled temperature-stress conditions

Scientific Reports
To investigate the long-term creep behavior of deep granite in geological repositories for high-level radioactive waste under coupled temperature and stress conditions, a full-time temperature–stress coupled creep damage constitutive model (TSD model ...
Jun Hu, Junxin Shi, Jin Wu, Shuai Zhang, Yamin Zhao, Shangjun Zhao, Zhaokui Sun, Hanyu Dang, Houhai Yuan   +8 more
doaj   +1 more source

Creep Model of Weakly Cemented Soft Rock Considering Damage and Secondary Development in FLAC3D

Applied Sciences
The time-dependent deformation control of weakly cemented soft rock in deep underground engineering is a critical scientific issue that directly affects the long-term stability of roadways.
Junhong Huang, Shanchao Hu, Xuelong Li, Shihao Guo, Chenxi Zhang, Zhihao Gao, Jinhao Dou, Dawang Yin, Yafei Cheng   +8 more
doaj   +1 more source

Creep Mechanical Properties of Marble Under Graded Unloading Conditions

Applied Sciences
To study the creep mechanical behavior of surrounding rock under the coupled effect of confining pressure unloading and deviatoric stress increase during the excavation of deep underground engineering, triaxial creep tests under stepwise unloading of ...
Yongcheng Guo, Zhuo Yu, Shunan Wang, Jianlin Li, Huafeng Deng   +4 more
doaj   +1 more source

Three-dimensional creep constitutive model of sandstone based on damage statistics

工程科学与技术
MethodsThe Nishihara model in the classical elastoplastic model was selected and the damage was introduced to make up for the shortcomings that it could not reveal the nonlinear creep characteristics of the rock, and the Weibull distribution function was
Wang Liukai, Cai Guojun, Zhao Weiping, Hu Xing   +3 more
doaj