scholarly journals CHARACTERIZATION OF THE CRACK PROPAGATION IN A MICROSTRUCTURALLY RANDOM MATERIAL

2021 ◽  
Author(s):  
MIGUEL A. RODRIGUEZ MARQUEZ ◽  
CARLOS A. MORA SANTOS ◽  
HELVIO R. MOLLINEDO ◽  
JUDITH DIAZ DOMINGUEZ ◽  
JORGE BEDOLLA HERNÁNDEZ
Keyword(s):  
Crack Propagation

scholarly journals Material parametrization of natural rubber based compound and characterization of crack propagation under consideration of dissipative effects

2021 ◽  
Author(s):  
Dan Pornhagen ◽  
Konrad Schneider ◽  
Markus Stommel
Keyword(s):  
Energy Dissipation ◽  
Crack Propagation ◽  
Natural Rubber ◽  
Experimental Tests ◽  
Material Behavior ◽  
Prony Series ◽  
Material Forces ◽  
Cracking Behavior ◽  
Dissipative Effects

AbstractMost concepts to characterize crack propagation were developed for elastic materials. When applying these methods to elastomers, the question is how the inherent energy dissipation of the material affects the cracking behavior. This contribution presents a numerical analysis of crack growth in natural rubber taking energy dissipation due to the visco-elastic material behavior into account. For this purpose, experimental tests were first carried out under different load conditions to parameterize a Prony series as well as a Bergström–Boyce model with the results. The parameterized Prony series was then used to perform numerical investigations with respect to the cracking behavior. Using the FE-software system ANSYS and the concept of material forces, the influence and proportion of the dissipative components were discussed.

Interfacial Fracture Characterization of Nano-Scale Thin Films Using Single-Strip Stress-Engineered Superlayer

2006 ◽  
Author(s):  
Jiantao Zheng ◽  
Suresh K. Sitaraman
Keyword(s):  
Thin Films ◽  
Crack Propagation ◽  
Interfacial Crack ◽  
Interfacial Fracture ◽  
Critical Energy ◽  
Test Method ◽  
Nano Scale ◽  
Available Energy ◽  
Fracture Parameters

Characterization of interfacial fracture parameters for nano-scale thin films continues to be challenging due to the difficulties associated with preparing samples, fixturing and loading the samples, and extracting and analyzing the experimental data. In this paper, we propose a stress-engineered superlayer test method that can be used to measure the interfacial fracture parameters of nano-scale (as well as micro-scale) thin films without the need for loading fixtures. The proposed test employs the residual stress in sputter-deposited metals to provide the energy for interfacial crack propagation. The innovative aspect of the test is the use of an etchable release layer that is deposited between the two interfacial materials of interest. The release layer is designed such that the available energy for interfacial crack propagation will continue to decrease as the crack propagates, and at the location where the crack ceases to propagate, the available energy for crack propagation will be the critical energy for crack propagation or the interfacial fracture toughness. The proposed test method has been successfully used to characterize Ti thin film on Si substrate.

Crack Propagation Characterization of Asphalt Mixtures: Weibull Distribution and Entropy Approach

2020 ◽  
Vol 32 (3) ◽  
pp. 04020003
Author(s):  
Ahmed A. Soliman ◽  
Raymond N. Laoulache ◽  
Walaa S. Mogawer
Keyword(s):  
Crack Propagation ◽  
Weibull Distribution ◽  
Asphalt Mixtures

Characterization of crack propagation in particleboard

1996 ◽  
Vol 30 (5) ◽  
Author(s):  
R.J.A. Ehart ◽  
S.E. Stanzl-Tschegg ◽  
E.K. Tschegg
Keyword(s):  
Crack Propagation

Electron back scattered diffraction characterization of thermomechanical fatigue crack propagation of a near α titanium alloy Timetal 834

2015 ◽  
Vol 65 ◽  
pp. 297-311 ◽  
Author(s):  
Kartik Prasad ◽  
Phani S. Karamched ◽  
A. Bhattacharjee ◽  
Vikas Kumar ◽  
K. Bhanu Sankara Rao ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Thermomechanical Fatigue ◽  
Electron Back Scattered Diffraction

Characterization of fatigue crack propagation of pitting-corroded rebars using weak magnetic signals

2021 ◽  
Vol 257 ◽  
pp. 108033
Author(s):  
Kai Zhang ◽  
Jun Zhang ◽  
Weiliang Jin ◽  
Jianghong Mao ◽  
Yidong Xu ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation

Characterization of the Crack Propagation in the API X-52 and API X-65 Steels into Cathodic Protection

2009 ◽  
Vol 1242 ◽  
Author(s):  
A. Aguilar ◽  
R. Esparza ◽  
M.A. Gil ◽  
L.F. Cuahutitla ◽  
E. Rubio-Rosas ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Crack Propagation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Cathodic Protection ◽  
Reference Electrode ◽  
Important Variable ◽  
Corrosion Cracking ◽  
High Concentrations

ABSTRACTCathodic protection has been applied for many years as the best method to prevent the corrosion in systems which transported hydrocarbon pipelines. However, it has found the presence of stress corrosion cracking (SCC) in steel pipelines with high concentrations of carbonates and bicarbonates with pH final (9 to 11). The resistance to the stress corrosion cracking of the API X-52 and API X-65 steels was evaluated on compact modified wedge opening specimens (WOL). The specimens were loaded of 95% of the yield strength. The resistance of crack propagation and the corrosion rate were evaluated with different applied potentials (-850 and -650 mV), this with respect to a saturated copper/copper sulfate reference electrode. The used electrolytes were simulated soils (carbonate-bicarbonate solution). Evidence of crack propagation of the API X-52 and API X-65 steels were carried out by scanning electron microscopy. The obtained result showed susceptibility to SCC on specimens with cathodic protection. The cathodic protection applied (-850 mV vs Cu/CuSO4 electrode) decreases considerably the corrosion rate on the evaluated steels. In this work the loaded stress showed to be a very important variable on the susceptibility to SCC.

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