Results 81 to 90 of about 2,683,565 (214)
Deep Underground Science and Engineering, EarlyView.The graphical abstract illustrates the real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection. Under in‐situ hydrostatic pressure, the water invasion front advances progressively along the axial direction as the injection pressure increases stepwise, tracked in real time by nuclear magnetic ...
Lei Song +6 more
wiley +1 more source
Effect of Stress Triaxiality and Lode Angle on Ductile Fracture
, 2023 Although many ductile damage accumulation studies have been done in recent years, there is still insufficient research towards the development of ductile fracture models, mainly due to the difficulty of performing experiments under different states of ...
Nia, Mahan
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Redefining stress triaxiality for ultra-low cycle fatigue of structural steels
Stress triaxiality has been a cornerstone parameter for describing void growth and ductile fracture in metals for more than 60 years. Its classical definition, derived from J2 plasticity without accounting for backstress, becomes inadequate in ultra-low ...
Yam, Michael C.H. +4 more
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Deep Underground Science and Engineering, EarlyView.An intelligent inversion framework estimates the dilatancy angle of the surrounding rock from negative Poisson's ratio (NPR) anchor cable force histories. Numerical tunnel‐excavation simulations generate force data across a controlled dilatancy‐angle range, which are mapped to the target parameter using a sequential convolutional neural network (CNN ...
Li Cui +5 more
wiley +1 more source
International Journal of Eating Disorders, EarlyView.ABSTRACT Objective Maladaptive exercise includes excessive, compulsive, or compensatory exercise and is a common eating‐disorder (ED) symptom associated with increased severity, slower rates‐of‐recovery, and faster rates‐of‐relapse. Affect‐regulation theories posit that maladaptive exercise functions to reduce high negative affect (NA), although ...
Danielle A. N. Chapa +4 more
wiley +1 more source
Development and Validation of a Seismic Design Method for Anchored Retaining Walls
Earthquake Engineering &Structural Dynamics, EarlyView.ABSTRACT Retaining walls with multiple anchor levels are widely used as permanent excavation support systems for the construction of linear infrastructures. Yet, their seismic behaviour remains largely unexplored, and current design approaches rely on conventional procedures that do not adequately reflect the actual dynamic response of these systems ...
Luigi Callisto +2 more
wiley +1 more source
Energy Science &Engineering, EarlyView.Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley +1 more source
Fracture Initiation in Aluminum Alloys Under Multiaxial Loading at Various Low Strain Rates
MetalsThe initiation of ductile fractures in medium-strength AW5754 and high-strength AW6082 aluminum alloys at different quasi-static strain rates and under multiaxial stress states was investigated through a series of tensile tests using various specimen ...
Mehmet Haskul, Eray Arslan
doaj +1 more source
A stress Triaxiality-Modified von Mises model for high-strength steels
The classic von Mises yield criterion assumes that the yielding behavior of metal materials is unrelated to hydrostatic pressure. However, various experimental studies have shown that stress triaxiality has a critical effect on the yield stress of high ...
Kaiqi Wang
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Numerical simulation of low stress triaxiality ductile fracture
, 2006 One of the main shortcoming of existing damage models when applied to the simulation of metal forming operations is their limited validity under low stress triaxiality conditions.
Pardoen, Thomas
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