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On strain-rate sensitivity and size effect of brittle solids: transition from cooperative phenomena to microcrack nucleation
dc.creator | Mastilović, Sreten | |
dc.date.accessioned | 2022-11-30T21:36:06Z | |
dc.date.available | 0001-01-01 | |
dc.date.issued | 2013 | |
dc.identifier.issn | 0935-1175 | |
dc.identifier.uri | http://rimsi.imsi.bg.ac.rs/handle/123456789/1589 | |
dc.description.abstract | An idealized brittle microscale system is subjected to dynamic uniaxial tension in the medium-tohigh strain-rate range (˙ε ∈ [100 s−1, 1×107 s−1]) to investigate its mechanical response under constrained spatial and temporal scales. The setup of dynamic simulations is designed to ensure practically identical inplane stress conditions on a system of continuum particles forming a two-dimensional, geometrically and structurally disordered, lattice. The rate sensitivity of size effects is observed as well as the ordering effect of kinetic energy. A simple phenomenological expression is developed to account for the tensile strength sensitivity of the small-sized brittle systems to the strain-rate and extrinsic size effects, which may serve as a guideline for formulation of constitutive relations in the MEMS design. The representative sample is defined as a square lattice size for which the tensile strength becomes rate-insensitive and an expression is proposed to model its evolution between two asymptotes corresponding to the limiting loading rates. The dynamics of damage accumulation is analyzed as a function of sample size and loading rate. | sr |
dc.language.iso | en | sr |
dc.publisher | Springer Nature | sr |
dc.relation | Matematički Modeli i Metode Optimizacije Velikih Sistema (RS-174010) | sr |
dc.rights | openAccess | sr |
dc.source | Continuum Mechanics and Thermodynamics | sr |
dc.subject | Lattice models | sr |
dc.subject | Brittle solids | sr |
dc.subject | Disordered system | sr |
dc.subject | Representative volume element | sr |
dc.subject | Size effect | sr |
dc.subject | Strain-rate effect | sr |
dc.subject | Scaling exponents | sr |
dc.title | On strain-rate sensitivity and size effect of brittle solids: transition from cooperative phenomena to microcrack nucleation | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.epage | 501 | |
dc.citation.issue | 2-4 | |
dc.citation.rank | M22 | |
dc.citation.spage | 489 | |
dc.citation.volume | 25 | |
dc.identifier.doi | 10.1007/s00161-012-0279-0 | |
dc.identifier.fulltext | http://rimsi.imsi.bg.ac.rs/bitstream/id/3903/SMastilovic_CMAT2013accepted.pdf | |
dc.type.version | acceptedVersion | sr |