A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analysis of pre-peak strain energy storage transformation mechanism of diorite under triaxial loading–unloading paths
Abstract To address the unclear instability mechanism of a rock mass under a complex stress path and considering the widely recognized research methods with energy as the main line, this study systematically analyzes the evolution of the pre-peak strain energy of diorite under triaxial loading and unloading paths using laboratory tests and numerical simulations. First, the characteristic parameter data were obtained by laboratory tests to study the effects of different loading and unloading rates on the pre-peak strain energy accumulation of diorite. Second, the influence of different unloading confining pressure rates and times and axial loading rates on the nonlinear strain energy accumulation characteristics of diorite were studied using a strain energy self-suppression evolution model. As a result, the large difference between the promotion and self-repression effects of the strain energy accumulation mechanism before the peak strength accurately revealed the strain energy accumulation phenomenon. The ultimate strain energy accumulation capacity of diorite increased with the unloading confining pressure timing and axial loading rate and decreased with the unloading confining pressure rate. Moreover, a higher unloading confining pressure rate activated the promotion and self-repression effects of the strain energy accumulation mechanism, whereas a larger unloading confining pressure timing and axial loading rate weakened them.
Analysis of pre-peak strain energy storage transformation mechanism of diorite under triaxial loading–unloading paths
Abstract To address the unclear instability mechanism of a rock mass under a complex stress path and considering the widely recognized research methods with energy as the main line, this study systematically analyzes the evolution of the pre-peak strain energy of diorite under triaxial loading and unloading paths using laboratory tests and numerical simulations. First, the characteristic parameter data were obtained by laboratory tests to study the effects of different loading and unloading rates on the pre-peak strain energy accumulation of diorite. Second, the influence of different unloading confining pressure rates and times and axial loading rates on the nonlinear strain energy accumulation characteristics of diorite were studied using a strain energy self-suppression evolution model. As a result, the large difference between the promotion and self-repression effects of the strain energy accumulation mechanism before the peak strength accurately revealed the strain energy accumulation phenomenon. The ultimate strain energy accumulation capacity of diorite increased with the unloading confining pressure timing and axial loading rate and decreased with the unloading confining pressure rate. Moreover, a higher unloading confining pressure rate activated the promotion and self-repression effects of the strain energy accumulation mechanism, whereas a larger unloading confining pressure timing and axial loading rate weakened them.
Analysis of pre-peak strain energy storage transformation mechanism of diorite under triaxial loading–unloading paths
An, Xuexu (author) / Su, Yan (author) / Tao, Lei (author) / Tian, Anan (author) / Hu, Zhiping (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
| British Library Online Contents | 2017
Strain Energy Dissipation and Damage Evolution of Frozen Migmatite Under Triaxial Unloading
| Online Contents | 2019
Strain Energy Dissipation and Damage Evolution of Frozen Migmatite Under Triaxial Unloading
| Online Contents | 2019