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contributor authorLe, Jia-Liang
contributor authorEliáš, Jan
contributor authorGorgogianni, Anna
contributor authorVievering, Joshua
contributor authorKvětoň, Josef
date accessioned2019-02-28T10:57:55Z
date available2019-02-28T10:57:55Z
date copyright12/11/2017 12:00:00 AM
date issued2018
identifier issn0021-8936
identifier otherjam_085_02_021003.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4251232
description abstractThis 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.
publisherThe American Society of Mechanical Engineers (ASME)
titleRate-Dependent Scaling of Dynamic Tensile Strength of Quasibrittle Structures
typeJournal Paper
journal volume85
journal issue2
journal titleJournal of Applied Mechanics
identifier doi10.1115/1.4038496
journal fristpage21003
journal lastpage021003-12
treeJournal of Applied Mechanics:;2018:;volume( 085 ):;issue: 002
contenttypeFulltext


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