Yielding in amorphous solids reveals an age-dependent intrinsic lengthscale
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866912671079596032 |
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| author | Sreekumari, Aparna Adhikari, Monoj Pingua, Nandlal Krishnan, Vishnu V. Sengupta, Shilditya Chaudhuri, Pinaki Karmakar, Smarajit Vasisht, Vishwas V. |
| author_facet | Sreekumari, Aparna Adhikari, Monoj Pingua, Nandlal Krishnan, Vishnu V. Sengupta, Shilditya Chaudhuri, Pinaki Karmakar, Smarajit Vasisht, Vishwas V. |
| contents | Understanding how amorphous solids yield under shear is central to predicting material failure, yet prescribing reliable local yielding criteria remains a fundamental challenge. Here, through a mesoscale analysis of localized yielding, we reveal an intrinsic length scale (ζ) that governs local failure, and demonstrate that ζgrows with the age of the system. The age dependence shows up not only in the features of the distribution of local yield stress but also in the pseudogap exponent θ, which provides a measure of marginal stability of the amorphous solids. These insights are made possible by a new method, termed the soft matrix approach, that allows local regions of an amorphous solid to yield within a minimally constrained, elastically coupled environment. By overcoming key limitations of earlier techniques, our approach provides a robust platform for probing failure mechanisms, particularly in soft disordered materials and paves the way for improved elastoplastic modeling of disordered solids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_04917 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Yielding in amorphous solids reveals an age-dependent intrinsic lengthscale Sreekumari, Aparna Adhikari, Monoj Pingua, Nandlal Krishnan, Vishnu V. Sengupta, Shilditya Chaudhuri, Pinaki Karmakar, Smarajit Vasisht, Vishwas V. Soft Condensed Matter Disordered Systems and Neural Networks Statistical Mechanics Understanding how amorphous solids yield under shear is central to predicting material failure, yet prescribing reliable local yielding criteria remains a fundamental challenge. Here, through a mesoscale analysis of localized yielding, we reveal an intrinsic length scale (ζ) that governs local failure, and demonstrate that ζgrows with the age of the system. The age dependence shows up not only in the features of the distribution of local yield stress but also in the pseudogap exponent θ, which provides a measure of marginal stability of the amorphous solids. These insights are made possible by a new method, termed the soft matrix approach, that allows local regions of an amorphous solid to yield within a minimally constrained, elastically coupled environment. By overcoming key limitations of earlier techniques, our approach provides a robust platform for probing failure mechanisms, particularly in soft disordered materials and paves the way for improved elastoplastic modeling of disordered solids. |
| title | Yielding in amorphous solids reveals an age-dependent intrinsic lengthscale |
| topic | Soft Condensed Matter Disordered Systems and Neural Networks Statistical Mechanics |
| url | https://arxiv.org/abs/2306.04917 |