Time-dependent brittle creep in Darley Dale sandstone

Creep: Time‐dependent brittle deformation in rocks

Asthma care in Darley Dale: general practitioner audit.

OBJECTIVE To complete a first audit cycle of asthma care in Darley Dale after starting an asthma clinic. DESIGN Pre-clinic (1989) and post-clinic (1990) analysis of medical records of patients with asthma. SETTING A group practice in Derbyshire. PATIENTS 161 pre-clinic, 238 post-clinic patients with asthma. MAIN OUTCOME MEASURES Term "asthma" in the patient's computerised problem list, ...

Brittle creep, damage and time-to-failure in rocks

We propose a numerical model based on static fatigue laws in order to model the time-dependent damage and deformation of rocks under creep. An empirical relation between time-to-failure and applied stress is used to simulate the behavior of each element of our finite element model. We first review available data on creep experiments, in order to study how the material properties and the loading...

Influence of temperature on brittle creep in sandstones

[1] The characterization of time-dependent brittle creep, promoted by chemically active pore fluids, is fundamental to our understanding of the long-term evolution and dynamics of the Earth’s crust. Here we report results from a study of the influence of temperature on both short-term strength and time-dependent brittle creep in three sandstones under triaxial stress conditions. We show that an...

Time-Dependent Thermo-Electro-Mechanical Creep Behavior of Radially Polarized FGPM Rotating Cylinder

Time-dependent creep analysis is crucial for the performance and reliability of piezoactuators used for high-precision positioning and load-bearing applications. In this study history of stresses, deformations and electric potential of hollow rotating cylinders made of functionally graded piezoelectric material (FGPM), e.g., PZT_7A have been investigated using Mendelson’s method of successive e...