Pathway · p-4d6800fa81 · candidate

Vibration-driven elastocaloric cooler (proposed)

Mechanical vibrationElastic deformationMechanical stress or strainElastocaloric effectCooling

Ambient vibration stresses off-axis ferroelectric patches on a cantilever elastocalorically and periodic contacts carry the heat away — proposed and modelled by finite elements, never built. The genuine open question behind this route is whether ambient vibration supplies enough stress, timing and heat transfer for sustained cooling.

Epistemic state of the route

known constituent relations: 3 / 4 established or replicated · weakest constituent demonstrated
constituent maturity floor: K4 · experimentally observed
search for this exact route: Exact composition search: reviewed 2026-09-21 — partial; No demonstration known and none found: the only work that joins ambient vibration to elastocaloric cooling is the Kumar 2019 finite-element proposal the atlas already records as a proposed pathway; every elastocaloric experiment the forms return is loaded by a test machine or a designed actuator. Inconclusive as a route search until the Scholar and Semantic Scholar runs exist.
recorded pathway: Vibration-driven elastocaloric cooler (proposed) · proposed in the literature, not demonstrated — a proposal in the literature, not a demonstration; the route stays a candidate and its search state is unchanged by the proposal
composition maturity: K3 · theoretically quantified — Vibration-driven elastocaloric cooler (proposed)
recorded-pathway overlap: shares relations, in order, with Flexoelectric vibration harvester · 2/4 relations shared
route-level evidence: 1 source for the complete composition · 6 cited by the constituent steps
boundaries and interfaces: BOUNDARY compatible · no region transition

Explorematrix context · physics checks · performance · steps · route evidence · constituent evidence · cite

Matrix context

D = disequilibrium row · C = coupling family column. A cell reads the state of the atlas for that pair.

D.09 × C.09 · Mechanical vibration × Caloric (magneto/electro/elasto)family: Caloric (magneto/electro/elasto)

Literature search for this exact composition

Reviewed search · 2026-09-21OpenAlexpartial

No demonstration known and none found: the only work that joins ambient vibration to elastocaloric cooling is the Kumar 2019 finite-element proposal the atlas already records as a proposed pathway; every elastocaloric experiment the forms return is loaded by a test machine or a designed actuator. Inconclusive as a route search until the Scholar and Semantic Scholar runs exist.

6 runs · 5 attempts blocked before any result (Semantic Scholar, Google Scholar) — attempted, never counted · 153 unique records · 0 read in full · reviewed by Ava Kim's loop-3 lane · protocol route-search-v1

Vibration induced refrigeration using ferroelectric materials (2019) · proposal only · Kumar, Chauhan, Patel, Novak, Kumar & Vaish 2019 (Scientific Reports 9, 3922): the reviewer's precision query returns the atlas's own proposed pathway — a cantilever cooling device with off-axis 0.5BZT–0.5BCT patches strained elastocalorically by ambient vibration, 0.2 K in 50 s for ten elements at 1.5 Hz by finite-element analysis; a proposal with a model, no built device (recorded on pathway:vibration-elastocaloric-cooler, K3).
A cryogenic uniaxial strain cell for strain-dependent measurements (2025) · wrong driver · Review of Scientific Instruments 2025: a piezo-actuated uniaxial strain cell for cryogenic measurements, by title — a designed actuator for strain-dependent physics, not vibration and not cooling.
Reversible elastocaloric effect at ultra-low temperatures in nanocrystalline shape memory alloys (2018) · constituent only · Acta Materialia 2018: the elastocaloric effect of nanocrystalline shape-memory alloys under test-machine loading, by title — the second mechanism alone.
Giant elastic response and ultra-stable elastocaloric effect in tweed textured Fe-Pd single crystals (2021) · constituent only · Acta Materialia 2021: Fe–Pd single crystals' elastic response and elastocaloric effect under imposed strain, by title — the second mechanism alone.
Cyclic degeneration of elastocaloric effect for NiTi shape memory alloy: Experimental observation and constitutive model (2022) · constituent only · Int. J. Solids Struct. 2022: NiTi's elastocaloric effect under cyclic test-machine loading, by title — the second mechanism alone.
Temperature-dependent mechanical properties and elastocaloric effects of multiphase nanocrystalline NiTi alloys (2022) · constituent only · J. Alloys Compd. 2022: NiTi mechanical properties and elastocaloric effects under imposed loading, by title — the second mechanism alone.
Role of thermal expansion anisotropy on the elastocaloric effect of shape memory alloys with slim-hysteresis superelasticity (2023) · constituent only · Phys. Rev. Materials 2023: how thermal-expansion anisotropy shapes the elastocaloric effect of slim-hysteresis alloys, by title — the second mechanism alone.
Elastocaloric Effect Associated with Different Types of Martensitic Transformations: Typical First-Order and Weak First-Order Ones (2017) · constituent only · phys. stat. sol. (b) 2017: elastocaloric effects of first-order and weak first-order martensitic transformations, by title — the second mechanism alone.

Limitations: OpenAlex only (21/09, 11:15 am Sydney): driver-mechanism 364 works reported, the first 100 by relevance and the first 50 newest screened at title level (protocol depth), the rest unscreened — generic elastic-deformation mechanics with no elastocaloric element; mechanism-pair 6 (elastocaloric materials under test-machine loading); whole-chain 0; demonstration-precision 0; the reviewer's precision query 2, one of them the recorded Kumar 2019 proposal; Semantic Scholar answers 429 keyless (owner exception e953) and Google Scholar a captcha — both mandatory for a negative, neither run no composition term is frozen; if the literature names a "vibration-driven elastocaloric cooler" as a device the composite-name form becomes mandatory once the term is added with its source pass 49 (21/09 ~11:29 pm Sydney): every planned Semantic Scholar query was attempted once through the anonymous pool — 4 of 4 answered HTTP 429 at the first request (the runs above, each with its literal query, key and time); Google Scholar served its bot check at the first load of the driver-mechanism form (recorded as an attempt with nothing screened). Both engines are mandatory for a negative under route-search-v1, so the record stays partial and inconclusive: the outstanding obligations are the Semantic Scholar runs for every mandatory key and the Google Scholar runs to the protocol depth; OpenAlex's forms are complete. A blocked request is evidence that an engine was attempted, never that its query returned nothing.

Index query only · 2026-09-21OpenAlex · 6 queriesnot reviewed

736 indexed works reported across the queries, 153 unique retrieved; nobody has read them for a qualifying demonstration. A person can screen this frozen list and promote it to a reviewed record without re-running the query.

OAdriver-mechanism:1364 reported · 100 retrieved
OAdriver-mechanism:1364 reported · 50 retrieved
OAmechanism-pair:1-26 reported · 6 retrieved
OAwhole-chain0 reported · 0 retrieved
OAdemonstration-precision0 reported · 0 retrieved
OAdemonstration-precision2 reported · 2 retrieved

Planned runs NOT run in this bundle (engine unavailable): search:2026-09-21-p-4d6800fa81/s2-dm1 (semantic-scholar); search:2026-09-21-p-4d6800fa81/s2-mp12 (semantic-scholar); search:2026-09-21-p-4d6800fa81/s2-wc (semantic-scholar); search:2026-09-21-p-4d6800fa81/s2-dp (semantic-scholar).

Protocol route-search-v1: a frozen index run changes only the search state; only a reviewed record can say that a demonstration was or was not found.

Measured or reported performance

predicted source cooling (finite-element model)≈ 0.2 K in ≈ 50 smodel2019
ten cantilevers with off-axis 0.5BZT–0.5BCT patches, 2 mm imposed tip motion, 324 K, 1.5 Hz; 0.02 K per element; ≈ 2 K predicted from 358 K — model-only; no device has been built or measured
refs [3]

Steps

01
Mechanical vibration —drives→ Elastic deformationestablishedclaim record
mechanical → mechanical · loss to thermal
- cyclic deformation of an elastic member (a cantilever
- a plate
- a sheet) by base or inertial excitation; operation at a structural resonance amplifies the deformation but is not required
solid
refs [1] [2] [3]
02
Elastic deformation —produces→ Mechanical stress or strainestablishedclaim record
mechanical → mechanical
- the deformed member carries a cyclic stress or strain state that can drive a stress-driven conversion (flexoelectric
- elastocaloric
- piezoelectric)
refs [4] [1]
03
Mechanical stress or strain —drives→ Elastocaloric effectreplicatedclaim record
mechanical → thermal
- stress large enough to drive the martensitic transformation of a shape-memory alloy
solid
refs [5] [6]
04
Elastocaloric effect —converts into→ Coolingdemonstratedclaim record
thermal → thermal · loss to thermal
refs [5]

Evidence for the complete composition · 1

[3]
A. Kumar et al.. Vibration induced refrigeration using ferroelectric materials (2019)
Scientific Reports 9, 3922 · doi:10.1038/s41598-019-40159-8 · record

Evidence for the constituent relations · 6

[1]
A. Erturk, D. J. Inman. Piezoelectric Energy Harvesting (2011)
Wiley · doi:10.1002/9781119991151 · crossref ✓ 2026-09-19 · record
[2]
S. Yang et al.. Performance enhancement of flexoelectric energy harvester by structural design (2025)
International Journal of Smart and Nano Materials 16(4), 908–928 · doi:10.1080/19475411.2025.2592544 · record
[3]
A. Kumar et al.. Vibration induced refrigeration using ferroelectric materials (2019)
Scientific Reports 9, 3922 · doi:10.1038/s41598-019-40159-8 · record
[4]
J. F. Nye. Physical Properties of Crystals: Their Representation by Tensors and Matrices (1985)
Oxford University Press · book, no DOI · record
[5]
J. Tušek et al.. A regenerative elastocaloric heat pump (2016)
Nature Energy 1, 16134 · doi:10.1038/nenergy.2016.134 · crossref ✓ 2026-09-19 · record
[6]
X. Moya, S. Kar-Narayan, N. D. Mathur. Caloric materials near ferroic phase transitions (2014)
Nature Materials 13, 439–450 · doi:10.1038/nmat3951 · crossref ✓ 2026-09-19 · record

Cite this route

Physical Transformation Atlas (2026). route p-4d6800fa81: Vibration-driven elastocaloric cooler (proposed). Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/path/4d6800fa81

Ids and matrix addresses are stable across revisions; the revision hash identifies the exact canonical files the record was compiled from and is meta.data_hash in every /api export. Reuse terms: see the license field in any export.