PLASTIKLIK NAZARIYASI – qattiq jismlarning plastik defor- masiyalanishi o’rganiladigan mexanika bo’limi. P.n. jismlardagi plastiklik xossasining fizik ma’nosini emas, balki plastik (ishlovga moyil) jism- larning mikro-skopik xossalarini o’rganish, plastik deformasiyalanadi- gan jismlarda kuchlanish (zo’rikish) va deformasiyaning taqsimlanishini ani- klash usullarini to-pish b-n shugullana- Di. P.n. 19-a. oxirlaridan taraqkiy qila boshladi. Frantsuz olimi A.Sen-Venan, nemis olimlari R.Mizes, L.Prandtl, A.Nadan, rus olimlari S.L.Sobolev, S.G.Mixlin, A.A.Ilyushin, uzbek olimi X,.A.Rahmatullin va b. olimlar bu fanga muhim xissa qo’shgan. Amalda yupqa devorli yassi, tsilin- drik metall trubalarning cho’zilish, sikilishdagi plastiklik xossalari tekshiriladi. Bunda namuna tashki kuch ta’sirida siqiladi, cho’ziladi, burala- Di, unga ichki bosim ta’sir qiladi va h.k. Plastik deformasiyalanganda Mate- rialning zo’riqqan va deformasiyalan- gan holati unga qo’yilgan yukka bog’liq bo’ladi. Mac, namunaga ikkinchi marta yuk qo’yilganda uning elastiklik chega- rasi ortadi. Shuning uchun materialning biron zo’riqqan holatiga turli plastic deformasiyalar to’g’ri keladi. Jism- ning plastiklik modelini ta’riflash materialning zo’riqqan va deformasiya- langan holatlari orqali ifodalanadi- gan tenzorlarning o’zaro bog’liqligini aniqlashdan iborat. De-formasion P.n.dan tashqari, oqim nazariyasi ham mavjud. Bu nazariyaga ko’ra, zo’riqish va deformasiyaning o’sishi kuchlanish (zo’riqish) kompo-nentlariga bog’liq. P. n.ning ayrim sohalari \u2014 reologiya, yax- lit jismlar mexanikasi yaxshi rivoj- langan. P.n. texnikada \u2014 konstruktsiya- larni loyi-halashning muhim masalala- rini hal qilish, metallning plastik de- formasiyalanish texnologik jarayonini tekshirish va b.da katta o’rin egallaydi.<\/p>\n","protected":false},"excerpt":{"rendered":"
PLASTIKLIK NAZARIYASI – qattiq jismlarning plastik defor- masiyalanishi o’rganiladigan mexanika bo’limi. P.n. jismlardagi plastiklik xossasining fizik ma’nosini emas, balki plastik (ishlovga moyil) jism- larning mikro-skopik xossalarini o’rganish, plastik deformasiyalanadi- gan … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":99837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-119056","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-p-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"kr","enabled_languages":["uz","kr","ru"],"languages":{"uz":{"title":true,"content":true,"excerpt":false},"kr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/119056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/comments?post=119056"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/119056\/revisions"}],"predecessor-version":[{"id":119081,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/119056\/revisions\/119081"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media?parent=119056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/categories?post=119056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/tags?post=119056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}