Failure precursors and failure mechanisms in hierarchically patterned paper sheets in tensile and creep loading

M Pournajar, T Mäkinen, SA Hosseini, P Moretti… - Physical Review …, 2023 - APS
Physical Review Applied, 2023APS
Quasibrittle materials endowed with (statistically) self-similar hierarchical microstructures
show distinct failure patterns that deviate from the standard scenario of damage
accumulation followed by crack nucleation and growth. Here we study the failure of paper
sheets with hierarchical slice patterns as well as nonhierarchical and unpatterned reference
samples, considering both uncracked samples and samples containing a macroscopic
crack. Failure is studied under displacement-controlled tensile loading as well as under …
Quasibrittle materials endowed with (statistically) self-similar hierarchical microstructures show distinct failure patterns that deviate from the standard scenario of damage accumulation followed by crack nucleation and growth. Here we study the failure of paper sheets with hierarchical slice patterns as well as nonhierarchical and unpatterned reference samples, considering both uncracked samples and samples containing a macroscopic crack. Failure is studied under displacement-controlled tensile loading as well as under creep conditions. Acoustic emission records and surface strain patterns are recorded alongside stress-strain and creep curves. The measurements demonstrate that hierarchical patterning efficiently mitigates against strain localization and crack propagation. In tensile loading, this results in a significantly increased residual strength of cracked samples. Under creep conditions, for a given range of lifetimes, hierarchically patterned samples are found to sustain larger creep strains at higher stress levels; their creep curves show unusual behavior characterized by multiple creep rate minima due to the repeated arrest of emergent localization bands.
American Physical Society
以上显示的是最相近的搜索结果。 查看全部搜索结果

Google学术搜索按钮

example.edu/paper.pdf
搜索
获取 PDF 文件
引用
References