Tree growth stresses—Part IV: Visco-elastic strain recovery

1972 ◽  
Vol 6 (2) ◽  
pp. 95-120 ◽  
Author(s):  
J. D. Boyd ◽  
K. B. Schuster
Keyword(s):  
Tree Growth ◽  
Elastic Strain ◽  
Strain Recovery ◽  
Growth Stresses

Interpretation of elastic – strain – recovery measurements near Elliot Lake, Ontario

1970 ◽  
Vol 7 (2) ◽  
pp. 576-578
Author(s):  
G. H. Elsbacher ◽  
H. U. Bielenstein
Keyword(s):  
Stress Field ◽  
Elastic Strain ◽  
Sedimentary Rocks ◽  
Lake Ontario ◽  
Strain Recovery ◽  
Tectonic Deformation ◽  
In Situ Stresses ◽  
Stress Environments ◽  
Mine Openings

In situ stresses obtained by measurements of elastic – strain – recovery in quartzose sedimentary rocks near Elliot Lake are interpreted in terms of two stress environments: one stress field induced by mining close to the mine openings and a remanent stress field preserved in the rocks from a time of tectonic deformation in the area.

scholarly journals METHODS FOR ALLEVIATION AND REDUCTION OF THE EFFECTS OF GROWTH STRESSES IN Eucalyptus urophylla

2017 ◽  
Vol 41 (4) ◽  
Author(s):  
Juliana Cristina da Silva ◽  
Ana Márcia Macedo Ladeira Carvalho ◽  
Bruno de Freitas Homem de Faria
Keyword(s):  
Tree Growth ◽  
Growth Stress ◽  
Efficient Technique ◽  
Eucalyptus Urophylla ◽  
Herbicide Application ◽  
Growth Stresses ◽  
Cracking Control

ABSTRACT There are many species of the Eucalyptus genus presents high levels of the growth stress. These stresses are mechanical efforts generated during the tree growth to help maintaining the balance of the cup in response to environmental and silvicultural agents. The stresses are responsible for the cracks of tops and for the warp after unfolding. The objective of this study was to test five different methods to minimize the effects of growth stress on the production of Eucalyptus urophylla sawlogs. The boards produced were then evaluated and measured for cracking, arching, curvature and cupping. The treatment with herbicide presented the smallest medium indexes of cracking (16.63 cm) and of arching (0.23 mm.m-1), while the medium curvature was smaller than observed in boards unfolded in 72 hours after the reduction of the trees (0.88 mm.m-1). Unfolding after ten days of harvesting represented the less efficient technique in the cracking control, curvature and arching. The cupping was not observed during boards processing. The herbicide application was more efficient in the reduction of the effects of the growth tensions.

Prediction of elastic strain recovery of a formed steel sheet considering stiffness degradation

Meccanica ◽  
2008 ◽  
Vol 44 (3) ◽  
pp. 321-338 ◽  
Author(s):  
Miroslav Halilovič ◽  
Marko Vrh ◽  
Boris Štok
Keyword(s):  
Elastic Strain ◽  
Steel Sheet ◽  
Strain Recovery ◽  
Stiffness Degradation

scholarly journals Tree Growth Stresses

1950 ◽  
Vol 3 (3) ◽  
pp. 270 ◽  
Author(s):  
JD Boyd
Keyword(s):  
Stress Distribution ◽  
Tree Growth ◽  
Experimental Methods ◽  
Growth Stresses

Experimental methods for the determination of natural longitudinal stressesin trees are described and the data are used in the development of a mathematicalexpression for the stress distribution.

On the distribution of tree growth stresses

1979 ◽  
Vol 13 (1) ◽  
pp. 67-78 ◽  
Author(s):  
R. R. Archer
Keyword(s):  
Tree Growth ◽  
Growth Stresses

scholarly journals METHODS FOR ALLEVIATION AND REDUCTION OF THE EFFECTS OF GROWTH STRESSES IN Eucalyptus urophylla

2017 ◽  
Vol 41 (4) ◽  
Author(s):  
Juliana Cristina da Silva ◽  
Ana Márcia Macedo Ladeira Carvalho ◽  
Bruno de Freitas Homem de Faria
Keyword(s):  
Tree Growth ◽  
Growth Stress ◽  
Efficient Technique ◽  
Eucalyptus Urophylla ◽  
Herbicide Application ◽  
Growth Stresses ◽  
Cracking Control

ABSTRACT There are many species of the Eucalyptus genus presents high levels of the growth stress. These stresses are mechanical efforts generated during the tree growth to help maintaining the balance of the cup in response to environmental and silvicultural agents. The stresses are responsible for the cracks of tops and for the warp after unfolding. The objective of this study was to test five different methods to minimize the effects of growth stress on the production of Eucalyptus urophylla sawlogs. The boards produced were then evaluated and measured for cracking, arching, curvature and cupping. The treatment with herbicide presented the smallest medium indexes of cracking (16.63 cm) and of arching (0.23 mm.m-1), while the medium curvature was smaller than observed in boards unfolded in 72 hours after the reduction of the trees (0.88 mm.m-1). Unfolding after ten days of harvesting represented the less efficient technique in the cracking control, curvature and arching. The cupping was not observed during boards processing. The herbicide application was more efficient in the reduction of the effects of the growth tensions.

On the distribution of tree growth stresses

1985 ◽  
Vol 19 (3) ◽  
pp. 259-276 ◽  
Author(s):  
R. R. Archer
Keyword(s):  
Tree Growth ◽  
Growth Stresses
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