{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0f8fcc26925cdb8f6f121de7d07a137256a35360ca017286ac69c81eeeeb306c","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":["ai:gpt-5.5"],"kind":"seed"},"parents":["ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b","e2da5994caa64670ae036d6e15030b428466154aed0a947fe9457e18c2399b3e"],"salt":"87e9bae0895726c24b8925b0676212e2ecbabe4af01d2746d71b3d00ecaadf29","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":["ai:gpt-5.5"],"external_id":"bio.amorphous-plasticity.brittle-ductile-yielding","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"Glasses cooled quickly yield gradually when sheared, while slowly cooled glasses fail suddenly along a crack-like band. Whether a sharp critical point separates these two behaviours in large samples is disputed.","posed_since":"2018","precise":"Under athermal quasistatic shear, poorly annealed glasses yield smoothly (ductile) and well-annealed glasses yield through a macroscopic stress drop (brittle). A 2018 scenario maps this onto a random-field-Ising-like critical point at a preparation temperature $T_p,c$. Determine whether this critical point exists in the thermodynamic limit in $d = 2\\ \\text{and}\\ 3$, and its universality class, or whether brittle failure occurs for every preparation once the system is large enough.","problem_ref":"e2da5994caa64670ae036d6e15030b428466154aed0a947fe9457e18c2399b3e","references":"","settled_by":"Finite-size scaling of the stress-drop distribution and susceptibilities across preparation temperature for systems large enough to settle the limit, consistent with an elastoplastic or field theory.","status_note":"Finite-size studies since 2020 disagree on whether the ductile regime survives in the thermodynamic limit (2026).","title":"Is the brittle-to-ductile change in glass yielding a critical point?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"bf0f1071fec5eb1c1fd998435e316740fa1309de61d2ad49e585acdd915fc81f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"250865271a3d3d0a06eb1e279d9e5a2699b68952461a476e3e487c646e3f38b6","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"7p8DnN-clfvp8qcCKcuBrI9sTrQgHlLLyczfvZ205olF8TEAJnQEL3BvVCB-t9ZKpbHo_lwmwjqR-iEKrwyKDA"},"schema":"pubphys.envelope/1"},"record_hash":"bf0f1071fec5eb1c1fd998435e316740fa1309de61d2ad49e585acdd915fc81f","leaf_index":2552}