Mitigation of Early Thermal Contraction Cracks in Massive Footings

2021 ◽  
Vol 118 (6) ◽  
Author(s):  
Rodrigo Antunes ◽  
Mang Tia
Keyword(s):  
Thermal Contraction

Thermomechanical properties of iron and iron-carbon alloys: density and thermal contraction

1991 ◽  
Vol 62 (1) ◽  
pp. 24-33 ◽  
Author(s):  
Angela Jablonka ◽  
Klaus Harste ◽  
Klaus Schwerdtfeger
Keyword(s):  
Thermomechanical Properties ◽  
Thermal Contraction

Thermal Contraction, Land Bridges, and Geosynclines

1935 ◽  
Vol 72 (8) ◽  
pp. 377-380 ◽  
Author(s):  
P. R. Thompson
Keyword(s):  
Specific Gravity ◽  
Sea Level ◽  
Surface Area ◽  
Land Surface ◽  
Average Height ◽  
Thermal Contraction ◽  
Geological History ◽  
The Earth

Consideration of the continental areas over which the sea spread at various times during the course of geological history leads to the impression that perhaps every part of the land surface of the earth was, at one time or another, raised from a position below sea-level. The present land surface seems to have grown around ancient nuclei owing to the compression of the granitic, sedimentary, and other rocks of which the continental layers are composed. At certain times the compressive forces acted so strongly upon these rocks that the average height of the land reached maximum values, which might have been as great as 3,000 feet. Then denudation, and perhaps other processes, coming into operation and persisting through ages of comparative quiescence, lowered the surface, sometimes to minimum average levels, which might have been as low as 500 feet. There have been a few comparatively short periods of exceptionally high relief, separated by longer periods of low relief. Assuming that the land was raised by horizontal compression, the diminution in surface area of the earth necessary to produce a change in level of 2,500 feet would be very considerable. Instead of considering the change from a minimum average height of 500 feet to a maximum of 3,000 feet, it may be more convenient in the first place to consider the elevation of, say, the continental layers of Dr. H. Jeffreys from sea-level to the average height of the present land surface, that is about 2,500 feet, or 762 metres. It will be supposed, then, that the continental layers, as they now exist, were developed from layers consisting of 1 km. of sediments of specific gravity 2·4, 10 km. of granite of specific gravity 2·6, and 20 km. of tachylyte of specific gravity 2·9, the whole resting on dunite of specific gravity 3·3.

Fracture Mechanics of Adhesive Bonds

1974 ◽  
Vol 47 (1) ◽  
pp. 202-212 ◽  
Author(s):  
A. N. Gent
Keyword(s):  
Adhesive Joint ◽  
Unit Area ◽  
Energy Requirement ◽  
Critical Energy ◽  
Thermal Contraction ◽  
Adhesive Bonds ◽  
Adhesive Layers ◽  
Modes Of Failure ◽  
Shear Rupture ◽  
Set Up

Abstract A survey is given of the mechanics of rupture of a simple adhesive joint, comprising two relatively rigid adhering members joined by a layer of a deformable adhesive. Several different modes of failure are treated in terms of a critical energy requirement for growth by unit area of a pre-existing interfacial flaw or debond. They are: (i) Tensile rupture of joints with thick or thin adhesive layers, (ii) Shear rupture, (iii) Separation by stripping apart stiff or flexible adherends, i.e. cleavage. In addition, the stresses set up in joints by shrinkage of the adhesive, for example due to differential thermal contraction, are evaluated. Attention is drawn to probable sites and conditions for failure.

scholarly journals Paste backfill thermal contraction: Red Lake operations case study

2021 ◽  
Author(s):  
Jeffrey Oke ◽  
Katie Hawley ◽  
Tikou Belem ◽  
Ali Hashemi
Keyword(s):  
Thermal Contraction ◽  
Red Lake ◽  
Paste Backfill

The Influence of Oxygen-Rich Inclusions on the Nature of Austenite Decomposition Products of Weld Metal Deposits

1983 ◽  
Vol 21 ◽  
Author(s):  
M. Ferrante ◽  
K. Akune
Keyword(s):  
Weld Metal ◽  
Catalytic Effect ◽  
Thermal Contraction ◽  
Austenite Decomposition ◽  
Decomposition Products ◽  
The Matrix

ABSTRACTRecent studies carried out on weld metal have called attention to the role of oxygen-rich inclusions on austenite decomposition. This investigation describes some evidences of the catalytic effect of dislocations upon the γ → α transformation. These defects are generated at the matrix inclusion interface and its presence has been ascertained by TEM. Estimates of the stresses arising from differences in thermal contraction between inclusion and matrix on cooling confirm microstructural observations.

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