The role of reinforcement orientation on the damage evolution of AlSi12CuMgNi + 15% Al2O3 under compression

Epoxy asphalt (EA) concrete is widely used in constructing long-span steel bridge pavements (SBDPs). This study aims to derive a fatigue damage evolution law, conducting an experimental investigation of SBDP. First, a general theoretical form of the fatigue damage evolution law of materials is established based on the thermal motion of atoms. Then, fatigue experiments demonstrate that this evolution law well represents the known damage–life relationships of SBDP. Taking into account the experimental relationships between damage and fatigue life under symmetrical cyclic loadings with different overload amplitudes and temperature variations, a detailed damage evolution law is deduced. Finally, the role of damage accumulation is discussed on the basis of the proposed damage evolution law for the extreme situation of heavy overload and severe environments. The results show that both heavy loading and falling temperatures increase the fatigue damage of SBDP considerably. EA shows a fatigue life two to three times longer than that of modified matrix asphalt (SMA) or guss asphalt (GA). For the same thickness, EA pavement is demonstrated to be more suitable for an anti-fatigue design of large-span SBDP under high traffic flows and low temperatures.

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Role of alternating current shape on microstructure and damage evolution of solder joints

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2019.12.041 ◽

2020 ◽

Vol 50 ◽

pp. 450-455 ◽

Cited By ~ 1

Author(s):

Waluyo Adi Siswanto ◽

Aleksandr Yu. Krasnopevtsev ◽

Ghazal Feizi Talarpoushti ◽

Andino Maseleno ◽

Oleg R. Kuzichkin

Keyword(s):

Damage Evolution ◽

Solder Joints ◽

Alternating Current

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The role of non-stoichiometric defects in radiation damage evolution of SrTiO3

Journal of Materials Chemistry A ◽

10.1039/c3ta11046j ◽

2013 ◽

Vol 1 (32) ◽

pp. 9235 ◽

Cited By ~ 7

Author(s):

Jonghan Won ◽

Louis J. Vernon ◽

Aylin Karakuscu ◽

Robert M. Dickerson ◽

Marco Cologna ◽

...

Keyword(s):

Radiation Damage ◽

Damage Evolution

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Free Energy of Damaged Solids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1049-1050.1741 ◽

2014 ◽

Vol 1049-1050 ◽

pp. 1741-1746

Author(s):

Ji Zhang

Keyword(s):

Free Energy ◽

Elastic Energy ◽

Driving Force ◽

Damage Evolution ◽

Damage Mechanics ◽

Solid Mechanics ◽

Constitutive Models ◽

Traditional Fields ◽

State Functions

This paper examines the free energy potentials of damaged solids for the construction of damage mechanics constitutive models. The physical meaning of free energy in solid mechanics is analyzed in contrast with that in traditional fields of thermodynamics; 1D stress-strain curves are used to show the relationships between various thermodynamic state functions in isothermal loading processes; and the role of plastic free energy in damage evolution is discussed both macroscopically and microscopically. It is concluded that plastic free energy, which is a macroscopic representation of some additional microscopic elastic energy, cannot do work during unloading but get released when damage takes place, constituting part of the driving force for damage evolution.

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On the Damage Evolution of 3-D Hydrous Cracks through CT Tests

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.306-308.13 ◽

2006 ◽

Vol 306-308 ◽

pp. 13-18

Author(s):

Shu Cai Li ◽

Wei Shen Zhu ◽

Yu Yong Jiao ◽

H. Jian

Keyword(s):

Damage Evolution ◽

Interstitial Water ◽

Triaxial Compression ◽

Failure Process ◽

Water Injection ◽

Single Crack ◽

Damage Area ◽

Complete Failure ◽

Secondary Closure

By using the real-time CT (computerized tomography) unit with specially developed water-injection loading apparatus, several failure tests of single-crack concrete specimens with interstitial water pressures under triaxial compression were conducted. The complete failure process: the closure, the initiation of new damage area, the secondary closure, as well as the crack propagation of the specimens were simulated. The CT images at each stage, the CT numbers and the comparison among different sections in the specimens were obtained. Based on the observed results, the role of compressive pressure in damage and propagation of hydrous crack can be intuitively revealed, and the characteristics of damage-evolution of cracks in brittle material can be better understood at meso-level.

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Micromechanics-based damage model for liquid-assisted healing

International Journal of Damage Mechanics ◽

10.1177/1056789520948561 ◽

2020 ◽

Vol 30 (1) ◽

pp. 123-144 ◽

Cited By ~ 1

Author(s):

Georg Siroky ◽

Elke Kraker ◽

Dietmar Kieslinger ◽

Ernst Kozeschnik ◽

Werner Ecker

Keyword(s):

Surface Tension ◽

Damage Evolution ◽

Damage Model ◽

Pressure Surface ◽

Void Distribution ◽

Damage Healing ◽

Growth Of Voids ◽

Melting Experiments

This work presents a damage evolution framework including liquid-assisted healing. The model incorporates contributions from void size, void pressure, surface tension and liquid pressure. Experimental motivation for the damage-healing model is provided with in-situ melting experiments, where the evolution of the void distribution under monotonic tension is illustrated. The damage evolution is based on nucleation and growth of voids, which are modeled in a unified creep and plasticity framework. The proposed damage formulation introduces a void collective, which computes the void distribution in the material and allows to describe void collapse using the Rayleigh-Plesset equation. The necessary conditions for healing are discussed with use of model results. Particularly, the role of external load during healing, the dependence on liquid viscosity and surface tension are investigated.

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The role of elastic and plastic anisotropy of Sn on microstructure and damage evolution in lead-free solder joints

2011 International Reliability Physics Symposium ◽

10.1109/irps.2011.5784538 ◽

2011 ◽

Cited By ~ 3

Author(s):

Thomas R. Bieler ◽

Bite Zhou ◽

Lauren Blair ◽

Amir Zamiri ◽

Payam Darbandi ◽

...

Keyword(s):

Damage Evolution ◽

Solder Joints ◽

Plastic Anisotropy ◽

Lead Free ◽

Lead Free Solder ◽

Free Solder

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Damage Evolution and Annealing of Au-Irradiated Samarium Titanate Pyrochlore

MRS Proceedings ◽

10.1557/proc-792-r2.4 ◽

2003 ◽

Vol 792 ◽

Author(s):

Y. Zhang ◽

V. Shutthanandan ◽

S. Thevuthasan ◽

D. E. McCready ◽

J. Young ◽

...

Keyword(s):

Damage Evolution ◽

Thermal Recovery ◽

Nonlinear Dependence ◽

Nuclear Reaction Analysis ◽

In Situ Tem ◽

Predominant Role ◽

Recovery Stage ◽

Transmission Electron

ABSTRACTDamage evolution and thermal recovery of 1 MeV Au2+ irradiated samarium titanate pyrochlore (Sm2Ti2O7) single crystals were studied by Rutherford backscattering spectroscopy and nuclear reaction analysis. The damage accumulation follows a nonlinear dependence on dose that is well described by a disorder accumulation model, which indicates a predominant role of defect-stimulated amorphization processes. The critical dose for amorphization at 170 and 300 K is ∼0.14 dpa, and a higher dose of ∼ 0.22 dpa is observed for irradiation at 700 K, which agrees with previous in-situ transmission electron microscopy (TEM) data for polycrystalline Sm2Ti2O7. Annealing in an 18O environment reveals a damage recovery stage at ∼ 850 K that coincides with a significant increase in 18O exchange due to oxygen vacancy mobility. This thermal recovery stage is also consistent with the critical temperature for amorphization measured by in-situ TEM in polycrystalline samples.

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