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A novel error analysis is presented to overcome the difficulties caused by the strong discontinuity and derive the optimal estimate. Numerical experiments are carried out to verify the theoretical analysis.&lt;\/p&gt;&lt;\/abstract&gt;<\/jats:p>","DOI":"10.3934\/nhm.2023050","type":"journal-article","created":{"date-parts":[[2023,4,6]],"date-time":"2023-04-06T11:36:43Z","timestamp":1680781003000},"page":"1178-1189","source":"Crossref","is-referenced-by-count":0,"title":["A novel error analysis of nonconforming finite element for the clamped Kirchhoff plate with elastic unilateral obstacle"],"prefix":"10.3934","volume":"18","author":[{"given":"Lifang","family":"Pei","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Man","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meng","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2321","reference":[{"key":"key-10.3934\/nhm.2023050-1","doi-asserted-by":"publisher","unstructured":"C. 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