scholarly journals Lithospheric flexure and deformation-induced gravity changes: effect of elastic compressibility and gravitation on a multilayered, thick-plate model

1988 ◽  
Vol 92 (1) ◽  
pp. 73-88 ◽  
Author(s):  
J. Zhang ◽  
T.-f. Wong
Keyword(s):  
Thick Plate ◽  
Plate Model ◽  
Induced Gravity ◽  
Lithospheric Flexure ◽  
Gravity Changes

Failure behavior of hierarchical corrugated sandwich structures with second-order core based on Mindlin plate theory

2017 ◽  
Vol 21 (2) ◽  
pp. 552-579 ◽  
Author(s):  
Gang Li ◽  
Zhaokai Li ◽  
Peng Hao ◽  
Yutian Wang ◽  
Yaochu Fang
Keyword(s):  
Thick Plate ◽  
Failure Modes ◽  
Sandwich Structures ◽  
Plate Theory ◽  
Second Order ◽  
Mindlin Plate ◽  
Failure Behavior ◽  
Plate Model ◽  
Moderately Thick Plate ◽  
Mindlin Plate Theory

For hierarchical corrugated sandwich structures with second-order core, the prediction error of failure behavior by existing methods becomes unacceptable with the increase of structure thickness. In this study, a novel analytical model called moderately thick plate model is developed based on Mindlin plate theory, which can be used to analyze the failure behavior of hierarchical corrugated structures with second-order core under compression or shear loads. Then, the analytical expressions of nominal stress for six competing failure modes are derived based on the moderately thick plate model. The results of six different unit structures based on the moderately thick plate model agree quite well the ones by finite element methods. Furthermore, the influence of different structure thicknesses is investigated to validate the applicability of the moderately thick plate model. According to the comparative results with the thin plate model, the proposed moderately thick plate model has a better precision with the increase of the ratio of thickness to width for failure components.

hp-Clouds in Mindlin's thick plate model

2000 ◽  
Vol 47 (8) ◽  
pp. 1381-1400 ◽  
Author(s):  
Oscar Garcia ◽  
Eduardo A. Fancello ◽  
Clovis S. de Barcellos ◽  
C. Armando Duarte
Keyword(s):  
Thick Plate ◽  
Plate Model

Thick-Plate Model for Warping Stresses in Concrete Pavements

2000 ◽  
Vol 1 (2) ◽  
pp. 107-117 ◽  
Author(s):  
X.P. Shi ◽  
T.F. Fwa ◽  
Y. Hu ◽  
J. Zhang
Keyword(s):  
Thick Plate ◽  
Concrete Pavements ◽  
Plate Model

Analysis of exploitation‐induced gravity changes at Wairakei Geothermal Field

Geophysics ◽  
1986 ◽  
Vol 51 (8) ◽  
pp. 1647-1660 ◽  
Author(s):  
Richard G. Allis ◽  
Trevor M. Hunt
Keyword(s):  
Geothermal Field ◽  
Gravity Change ◽  
Gravity Models ◽  
Liquid Temperature ◽  
Surrounding Area ◽  
Liquid Pressure ◽  
Induced Gravity ◽  
Gravity Changes ◽  
Flow Equilibrium ◽  
The 1960S

Gravity changes (corrected for subsidence) of up to -1 000 (±300) μGal have occurred in the [Formula: see text] area of the production bore field at Wairakei, and smaller decreases extend over a [Formula: see text] surrounding area. The largest part of these decreases occurred during the 1960s; since then the net gravity change for the whole field has been zero, indicating mass flow equilibrium. The principal causes of gravity change have been deep liquid pressure drawdown which resulted in formation of a steam zone, subsequent saturation changes in the steam zone, liquid temperature decline, and groundwater level changes. Gravity models suggest saturation of the steam zone was 0.7 (±0.1) in 1962 and decreased to 0.6 by 1972. Gravity increases in the northern and eastern bore field since the early 1970s are attributed to cool water invading the steam zone.

scholarly journals Delineating a Volcanic Aquifer Using Groundwater-induced Gravity Changes in the Tatun Volcano Group, Taiwan

2021 ◽  
Author(s):  
Tzuyi Lien ◽  
Emmy Tsui-Yu Chang ◽  
cheinway Hwang ◽  
Ching-Chung Cheng ◽  
Kin-Fai Lam ◽  
...  
Keyword(s):  
Active Volcano ◽  
Volcanic Hazards ◽  
Phreatic Eruption ◽  
Volcanic Aquifer ◽  
Induced Gravity ◽  
Gravity Station ◽  
Additional Information ◽  
Gravity Changes ◽  
Superconducting Gravity ◽  
The Media

Abstract The Tatun Volcanic Group (TVG) is an active volcano that could cause volcanic hazards in northern Taiwan. The latest phreatic eruption of the TVG occurred some 6000 years ago. Understanding the state of groundwater around the TVG can be a crucial step towards effectively assessing the risk of phreatic explosion by providing information about the sources of groundwater and the media it flows. We measured gravity changes at a superconducting gravity station and several groundwater-sensitive sites to examine the way the groundwater altered the gravity values around the TVG. Groundwater-induced gravity changes are simulated by two hydrological models (A and B). Both models show coherent seasonal variations in groundwater level and gravity value in the center of the TVG (Chintiengang). This coherence indicates inter-connected porous media for free groundwater flows below Chintiengang. However, inconsistencies between the modeled and observed gravity changes occurred in the eastern part of the TVG, suggesting here highly heterogeneous formations with fractures and barriers may exist below Chihsinshan and Dayoukeng. The gravity consistencies and inconsistencies between the observations and the models are used to delineate a volcanic aquifer, which can provide additional information for assessing the probability of a potential phreatic eruption over the TVG.

Homogenization of a Thick Plate Model with Inclusions or Openings Periodically Distributed in the Thickness

1985 ◽  
Vol 19 (2-3) ◽  
pp. 101-116 ◽  
Author(s):  
R. P. Gilbert ◽  
Alain Bourgeat ◽  
Roland Tapiero
Keyword(s):  
Thick Plate ◽  
Plate Model

Five-slab thick-plate model for concrete pavement

2000 ◽  
Vol 1 (1-2) ◽  
pp. 9-34 ◽  
Author(s):  
Jin Zhang ◽  
Tien Fang Fwa ◽  
Kiang Hwee Tan ◽  
Xiao Ping Shi
Keyword(s):  
Thick Plate ◽  
Concrete Pavement ◽  
Plate Model

scholarly journals Nitsche based models for the unilateral contact of plates

2020 ◽  
Author(s):  
cedric pozzolini ◽  
Mathieu Fabre ◽  
Yves Renard
Keyword(s):  
Elastic Plate ◽  
Thick Plate ◽  
3D Structure ◽  
Unilateral Contact ◽  
Elastic Model ◽  
Plate Model ◽  
Plate Structures ◽  
Nitsche’S Method ◽  
Rigid Obstacle ◽  
Nitsche's Method

This paper aims to present different Nitsche-based models for the unilateral contact of plate structures. Our analysis is based on the consideration of Nitsche’s method on a 3D structure with kinematic assumptions of thin or thick plate theories. This approach is compared to that of Gustafsson, Stenberg and Videman which consists of Nitsche’s method applied directly on a 2D plate model. To simplify the presentation, we focus on the contact of an elastic plate with a rigid obstacle. The different approaches are compared numerically in terms of reliability compared to the 3D elastic model.     The aim of this paper is to present different Nitsche based models for the unilateral contact of plate structures. Our analysis is based on the consideration of Nitsche’s method on a 3D structure with kinematic assumptions of thin or thick plate theories. This approach is compared to the one of Gustafsson, Stenberg and Videman which consists of Nitsche's method directly applied on a 2D plate model. To simplify the presentation, we focus on the contact of an elastic plate with a rigid obstacle. The different approaches are numerically compared in terms of reliability compared to the 3D elastic model.

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