Test for Short Time Stress and Strain

1993 ◽  
pp. 45-47
Author(s):  
W. Lemm
Keyword(s):  
Stress And Strain ◽  
Time Stress ◽  
Short Time

Parametric correlation of very-short-time stress-rupture data for design purposes

1972 ◽  
Author(s):  
P. RAUT ◽  
W. CLOUGH ◽  
J. MCGINNIS
Keyword(s):  
Stress Rupture ◽  
Time Stress ◽  
Rupture Data ◽  
Short Time

Parametric Correlation of Very Short-Time, Stress-Rupture Data for Design Purposes

1972 ◽  
Vol 9 (11) ◽  
pp. 812-818
Author(s):  
P. K. RAUT ◽  
J. P. McGINNIS ◽  
W. R. CLOUGH
Keyword(s):  
Stress Rupture ◽  
Time Stress ◽  
Rupture Data ◽  
Short Time

Stress Relaxation Testing For Analysis of 12Cr1MoVG Steel for Creep Strength Evaluation

2007 ◽  
Vol 353-358 ◽  
pp. 408-411 ◽  
Author(s):  
Wei Ming Sun ◽  
Bing Bing Chen ◽  
Wei Ya Jin ◽  
Zeng Liang Gao
Keyword(s):  
Elevated Temperature ◽  
Stress Relaxation ◽  
Constant Load ◽  
Tensile Creep ◽  
Stress Relaxation Test ◽  
New Approach ◽  
Creep Properties ◽  
Time Stress ◽  
Creep Analysis ◽  
Short Time

The design of pressurized components at elevated temperature is limited by available mechanical properties that often do not span appropriate range of stress, time, strain and temperature. To improve the design process, a new approach based on short-time stress relaxation test (SRT) is introduced in steel tensile creep analysis. The experiments are implemented using SRT and tested for creep properties of 12Cr1MoVG steel at 560 °C. The results of creep curves agree well with the traditional constant load creep test data. The possibility to apply SRT approach is shown promising in the design of the pressurized component at elevated temperature.

Direct evidence of acute stress-induced facilitation of ACTH response to subsequent stress in rats

1999 ◽  
Vol 277 (3) ◽  
pp. R863-R868 ◽  
Author(s):  
Rosa Andrés ◽  
Octavi Martí ◽  
Antonio Armario
Keyword(s):  
Similar Pattern ◽  
Direct Evidence ◽  
Immobilization Stress ◽  
Acute Stress ◽  
Repeated Exposure ◽  
Facilitatory Effect ◽  
Time Stress ◽  
Short Time

To determine the role of glucocorticoids in the appearance of the facilitatory effect of stress on the ACTH response to a subsequent stress, sham-operated (Sham) rats and rats adrenalectomized (ADX) and supplemented with 50 mg/l corticosterone (B) in the drinking saline (ADX + B) were subjected to 1 min of immobilization stress (Imo) four consecutive times with an interstressor interval of 90 min. Sham rats showed a similar pattern of ACTH response to the first and fourth exposures to Imo. ADX + B rats showed an exacerbated ACTH response to the fourth Imo, despite higher prestress levels than those observed before the first Imo. In another experiment, no facilitatory effect of previous stress on ACTH response was found in ADX rats, but supplementation with B in the drinking saline for 1 wk resulted in facilitation of the ACTH response. We conclude that repeated exposure to a short-time stress induces a facilitatory effect on the ACTH response that is uncovered by eliminating stress-induced glucocorticoid release but needs B doses resulting in approximately basal circulating glucocorticoid levels to be induced or expressed.

Automated system for investigating the short-time stress relaxation of viscoelastic materials

1977 ◽  
Vol 12 (1) ◽  
pp. 126-130
Author(s):  
M. R. Kilevits ◽  
Ya. Ya. Indulevich ◽  
P. N. Adavich
Keyword(s):  
Stress Relaxation ◽  
Automated System ◽  
Viscoelastic Materials ◽  
Time Stress ◽  
Short Time

Short‐Time Stress Relaxation Behavior of Plastics

1955 ◽  
Vol 26 (6) ◽  
pp. 701-705 ◽  
Author(s):  
M. T. Watson ◽  
W. D. Kennedy ◽  
G. M. Armstrong
Keyword(s):  
Stress Relaxation ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Time Stress ◽  
Short Time

219 Real-time Stress and Strain Analysis Using Phase-shifting Photoelastic Coating Method

2001 ◽  
Vol 2001 (0) ◽  
pp. 153-154
Author(s):  
Ryoji KATO ◽  
Ryo MATSUI ◽  
Yoshiharu MORIMOTO ◽  
Takanori NOMURA ◽  
Motoharu FUJIGAKI ◽  
...  
Keyword(s):  
Real Time ◽  
Strain Analysis ◽  
Phase Shifting ◽  
Stress And Strain ◽  
Time Stress ◽  
Photoelastic Coating ◽  
Coating Method

CATECHOLAMINE RESPONSE TO SHORT-TIME STRESS IN SCHIZOPHRENIC AND DEPRESSIVE PATIENTS

1979 ◽  
pp. 1937-1939 ◽  
Author(s):  
M. Ackenheil ◽  
M. Albus ◽  
F. Müller ◽  
Th. Müller ◽  
D. Welter ◽  
...  
Keyword(s):  
Time Stress ◽  
Catecholamine Response ◽  
Short Time ◽  
Depressive Patients

scholarly journals Influence of Geostress Orientation on Fracture Response of Deep Underground Cavity Subjected to Dynamic Loading

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Weng ◽  
Xibing Li ◽  
Ming Tao
Keyword(s):  
Dynamic Loading ◽  
Strain Energy ◽  
High Stress ◽  
Numerical Code ◽  
Energy Concentration ◽  
Stress And Strain ◽  
Underground Cavity ◽  
Local Stresses ◽  
Deep Underground ◽  
Short Time

Deep underground cavity is often damaged under the combined actions of high excavating-induced local stresses and dynamic loading. The fracturing zone and failure type are much related to the initial geostress state. To investigate the influence of geostress orientation on fracture behaviours of underground cavity due to dynamic loading, implicit to explicit sequential solution method was performed in the numerical code to realize the calculation of geostress initialization and dynamic loading on deep underground cavity. The results indicate that when the geostress orientation is heterotropic to the roadway’s floor face (e.g., 30° or 60°), high stress and strain energy concentration are presented in the corner and the spandrel of the roadway, where V-shaped rock failure occurs with the release of massive energy in a very short time. When the geostress orientation is orthogonal to the roadway (e.g., 0° or 90°), the tangential stress and strain energy distribute symmetrically around the cavity. In this regard, the stored strain energy is released slowly under the dynamic loading, resulting in mainly parallel fracture along the roadway’s profile. Therefore, to minimize the damage extent of the surrounding rock, it is of great concern to design the best excavation location and direction of new-opened roadway based on the measuring data ofin situgeostresses.

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