Rate-Dependent Scaling of Dynamic Tensile Strength of Quasibrittle Structures
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU129855" target="_blank" >RIV/00216305:26110/18:PU129855 - isvavai.cz</a>
Výsledek na webu
<a href="http://appliedmechanics.asmedigitalcollection.asme.org/article.aspx?articleid=2664355" target="_blank" >http://appliedmechanics.asmedigitalcollection.asme.org/article.aspx?articleid=2664355</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/1.4038496" target="_blank" >10.1115/1.4038496</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Rate-Dependent Scaling of Dynamic Tensile Strength of Quasibrittle Structures
Popis výsledku v původním jazyce
This paper investigates the effect of strain rate on the scaling behavior of dynamic tensile strength of quasibrittle structures. The theoretical framework is anchored by a rate-dependent finite weakest link model. The model involves a rate-dependent length scale, which captures the transition from localized damage to diffused damage with an increasing strain rate. As a result, the model predicts a rate- and size-dependent probability distribution function of the nominal tensile strength. The transitional behavior of the strength distribution directly leads to the rate and size effects on the mean and standard deviation of the tensile strength. The model is verified by a series of stochastic discrete element simulations of dynamic fracture of aluminum nitride specimens. The simulations involve a set of geometrically similar specimens of various sizes subjected to a number of different strain rates. Both random microstructure geometry and fracture properties are considered in these simulations. The simulated damage pattern indicates that an increase in the strain rate results in a more diffusive cracking pattern, which supports the theoretical formulation. The simulated rate and size effects on the mean and standard deviation of the nominal tensile strength agree well with the predictions by the rate-dependent finite weakest link model.
Název v anglickém jazyce
Rate-Dependent Scaling of Dynamic Tensile Strength of Quasibrittle Structures
Popis výsledku anglicky
This paper investigates the effect of strain rate on the scaling behavior of dynamic tensile strength of quasibrittle structures. The theoretical framework is anchored by a rate-dependent finite weakest link model. The model involves a rate-dependent length scale, which captures the transition from localized damage to diffused damage with an increasing strain rate. As a result, the model predicts a rate- and size-dependent probability distribution function of the nominal tensile strength. The transitional behavior of the strength distribution directly leads to the rate and size effects on the mean and standard deviation of the tensile strength. The model is verified by a series of stochastic discrete element simulations of dynamic fracture of aluminum nitride specimens. The simulations involve a set of geometrically similar specimens of various sizes subjected to a number of different strain rates. Both random microstructure geometry and fracture properties are considered in these simulations. The simulated damage pattern indicates that an increase in the strain rate results in a more diffusive cracking pattern, which supports the theoretical formulation. The simulated rate and size effects on the mean and standard deviation of the nominal tensile strength agree well with the predictions by the rate-dependent finite weakest link model.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20102 - Construction engineering, Municipal and structural engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/GJ15-19865Y" target="_blank" >GJ15-19865Y: Diskrétní modely lomového porušení: adaptivní zjemňování diskretizace, hnací síla trhliny a napětí na hranici</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
ISSN
0021-8936
e-ISSN
1528-9036
Svazek periodika
85
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
12
Strana od-do
„021003-1“-„021003-12“
Kód UT WoS článku
000418706400003
EID výsledku v databázi Scopus
2-s2.0-85038374144