Limit Strain Method for Determining Long-Term Strength Based on Isostrain-Rate Creep Curve

2018 ◽  
pp. 212-219
Author(s):  
Zhen Wang ◽  
Mingrong Shen ◽  
Qingzhao Zhang ◽  
Linlin Gu ◽  
Zejun Luo
Keyword(s):  
Creep Curve ◽  
Limit Strain ◽  
Term Strength ◽  
Strength Based ◽  
Strain Method

Estimation of Salt Rocks’ Long-Term Strength in Natural Conditions

2015 ◽  
Vol 243 ◽  
pp. 11-16
Author(s):  
Alexander A. Baryakh ◽  
Sergey Yu. Lobanov ◽  
Ivan S. Lomakin
Keyword(s):  
Underground Mining ◽  
Term Strength ◽  
New Approach ◽  
In Situ Data ◽  
The Earth ◽  
Deformation And Fracture ◽  
Strength Based ◽  
Fracture Processes

New approach to construction curve of salt rock’s long-term strength based on the diagram’s analysis of the earth surface subsidence growth under the influence of underground mining has been proposed. Performed verification of received estimation showed acceptable fit of mathematical modeling results of interchamber pillars’ deformation and fracture processes with in-situ data.

Subcritical Crack Growth and Long-Term Strength in Rock and High-Strength and Ultra Low-Permeability Concrete

2009 ◽  
Vol 58 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Yoshitaka NARA ◽  
Masafumi TAKADA ◽  
Daisuke MORI ◽  
Hitoshi OWADA ◽  
Tetsuro YONEDA ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
High Strength ◽  
Low Permeability ◽  
Term Strength

Long-term strength of reinforcing steel 22H2G2АYu in case of corrosion cracking test in boiling nitrate solution

2019 ◽  
pp. 33-39
Author(s):  
N. N. Sergeev ◽  
◽  
S. N. Kutepov ◽  
A. N. Sergeev ◽  
A. G. Kolmakov ◽  
...  
Keyword(s):  
Nitrate Solution ◽  
Corrosion Cracking ◽  
Term Strength ◽  
Reinforcing Steel

scholarly journals Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2154
Author(s):  
Amir Hussain Idrisi ◽  
Abdel-Hamid I. Mourad ◽  
Muhammad M. Sherif
Keyword(s):  
Exposure Time ◽  
Prolonged Exposure ◽  
Mechanical Performance ◽  
Matrix Cracking ◽  
Pull Out ◽  
Strength Based ◽  
Different Temperatures ◽  
River Line ◽  
Composite Samples

This paper presents a long-term experimental investigation of E-glass/epoxy composites’ durability exposed to seawater at different temperatures. The thermoset composite samples were exposed to 23 °C, 45 °C and 65 °C seawater for a prolonged exposure time of 11 years. The mechanical performance as a function of exposure time was evaluated and a strength-based technique was used to assess the durability of the composites. The experimental results revealed that the tensile strength of E-glass/epoxy composite was reduced by 8.2%, 29.7%, and 54.4% after immersion in seawater for 11 years at 23 °C, 45 °C, and 65 °C, respectively. The prolonged immersion in seawater resulted in the plasticization and swelling in the composite. This accelerated the rate of debonding between the fibers and matrix. The failure analysis was conducted to investigate the failure mode of the samples. SEM micrographs illustrated a correlation between the fiber/matrix debonding, potholing, fiber pull-out, river line marks and matrix cracking with deterioration in the tensile characteristics of the thermoset composite.

Long-term strength retrogression of silica-enriched oil well cement: A comprehensive multi-approach analysis

2021 ◽  
Vol 144 ◽  
pp. 106424 ◽  
Author(s):  
Xueyu Pang ◽  
Jiankun Qin ◽  
Lijun Sun ◽  
Ge Zhang ◽  
Honglu Wang
Keyword(s):  
Oil Well ◽  
Term Strength ◽  
Oil Well Cement ◽  
Well Cement
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