{"id":234,"date":"2026-01-05T06:47:21","date_gmt":"2026-01-05T06:47:21","guid":{"rendered":"https:\/\/www.impacttesting.net\/?p=234"},"modified":"2026-01-05T07:48:04","modified_gmt":"2026-01-05T07:48:04","slug":"pendulum-impact-resistance-test","status":"publish","type":"post","link":"https:\/\/www.impacttesting.net\/cs\/pendulum-impact-resistance-test\/","title":{"rendered":"Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu: Pochopen\u00ed normy ASTM D3420"},"content":{"rendered":"

P\u0159ehled kyvadlov\u00e9 zkou\u0161ky odolnosti proti n\u00e1razu<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong> je kl\u00ed\u010dovou metodou hodnocen\u00ed, kter\u00e1 se pou\u017e\u00edv\u00e1 ke stanoven\u00ed odolnosti plastov\u00fdch materi\u00e1l\u016f, zejm\u00e9na f\u00f3li\u00ed, kter\u00e9 se \u010dasto pou\u017e\u00edvaj\u00ed v obalov\u00e9m a stavebn\u00edm pr\u016fmyslu a v r\u016fzn\u00fdch dal\u0161\u00edch odv\u011btv\u00edch. Tato zkou\u0161ka simuluje re\u00e1ln\u00e9 podm\u00ednky t\u00edm, \u017ee hodnot\u00ed, jak materi\u00e1ly reaguj\u00ed p\u0159i n\u00e1hl\u00e9m n\u00e1razu. V\u00fdsledky poskytuj\u00ed d\u016fle\u017eit\u00e9 informace o hou\u017eevnatosti, trvanlivosti a celkov\u00e9 odolnosti materi\u00e1lu v\u016f\u010di mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed. Materi\u00e1ly, kter\u00e9 projdou touto zkou\u0161kou, jsou pova\u017eov\u00e1ny za odoln\u011bj\u0161\u00ed a obvykle se pou\u017e\u00edvaj\u00ed v prost\u0159ed\u00edch, kde mohou b\u00fdt vystaveny potenci\u00e1ln\u00edm mechanick\u00fdm sil\u00e1m, nap\u0159\u00edklad p\u0159i p\u0159eprav\u011b, manipulaci nebo pou\u017eit\u00ed v r\u016fzn\u00fdch aplikac\u00edch.<\/p>\n\n\n\n

\"Zkou\u0161ka<\/a><\/figure>\n\n\n\n

Co je ASTM D3420 a jak souvis\u00ed s kyvadlovou n\u00e1razovou zkou\u0161kou?<\/h2>\n\n\n\n

ASTM D3420<\/strong> je standardn\u00ed zku\u0161ebn\u00ed metoda pou\u017e\u00edvan\u00e1 k m\u011b\u0159en\u00ed odolnost proti n\u00e1razu<\/strong> plastov\u00fdch f\u00f3li\u00ed, zejm\u00e9na se zam\u011b\u0159en\u00edm na ur\u010den\u00ed, jak velkou s\u00edlu m\u016f\u017ee materi\u00e1l absorbovat, ne\u017e sel\u017ee. Zku\u0161ebn\u00ed metoda vyu\u017e\u00edv\u00e1 kyvadlov\u00fd n\u00e1razov\u00fd tester<\/strong> aby bylo mo\u017en\u00e9 na vzorek aplikovat p\u0159esn\u00e9 mno\u017estv\u00ed energie. N\u00e1raz se m\u011b\u0159\u00ed jako energie pot\u0159ebn\u00e1 k prora\u017een\u00ed nebo zlomen\u00ed materi\u00e1lu. Tato zkou\u0161ka je nezbytn\u00e1 pro zaji\u0161t\u011bn\u00ed toho, aby plastov\u00e9 materi\u00e1ly pou\u017e\u00edvan\u00e9 v obalech a dal\u0161\u00edch aplikac\u00edch odolaly mechanick\u00fdm sil\u00e1m, se kter\u00fdmi se mohou setkat b\u011bhem sv\u00e9ho \u017eivotn\u00edho cyklu.<\/p>\n\n\n\n

Kl\u00ed\u010dov\u00fdm aspektem ASTM D3420<\/strong> je jeho zam\u011b\u0159en\u00ed na zaji\u0161t\u011bn\u00ed toho, aby test prob\u00edhal za kontrolovan\u00fdch a standardizovan\u00fdch podm\u00ednek. Tato konzistence pom\u00e1h\u00e1 v\u00fdrobc\u016fm z\u00edskat spolehliv\u00e9 a opakovateln\u00e9 v\u00fdsledky, co\u017e z n\u00ed \u010din\u00ed z\u00e1kladn\u00ed zku\u0161ebn\u00ed metodu pro hodnocen\u00ed hou\u017eevnatosti materi\u00e1lu. V\u00fdsledky zkou\u0161ky poskytuj\u00ed d\u016fle\u017eit\u00e9 \u00fadaje o odolnost proti n\u00e1razu<\/strong> plast\u016f, kter\u00e9 lze n\u00e1sledn\u011b porovnat s re\u00e1ln\u00fdm v\u00fdkonem v aplikac\u00edch v\u00fdrobk\u016f.<\/p>\n\n\n\n

Pracovn\u00ed mechanismus kyvadlov\u00e9 r\u00e1zov\u00e9 zkou\u0161ky<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch Kyvadlov\u00fd n\u00e1razov\u00fd tester<\/strong> funguje na jednoduch\u00e9m, ale \u00fa\u010dinn\u00e9m principu. Zat\u00ed\u017een\u00e9 kyvadlo se uvoln\u00ed z ur\u010dit\u00e9 v\u00fd\u0161ky a energie p\u0159edan\u00e1 kyvadlem se vyu\u017eije k \u00faderu na vzorek um\u00edst\u011bn\u00fd mezi dv\u011bma deskami s kruhov\u00fdm otvorem. S\u00edla n\u00e1razu se zaznamen\u00e1 a tyto \u00fadaje se pou\u017eij\u00ed k posouzen\u00ed schopnosti materi\u00e1lu odol\u00e1vat pr\u016frazu nebo rozbit\u00ed.<\/p>\n\n\n\n

V N\u00e1razov\u00e1 zkou\u0161ka kyvadlem<\/strong>, energie pot\u0159ebn\u00e1 k vyvol\u00e1n\u00ed poruchy se zaznamen\u00e1 jako mno\u017estv\u00ed energie pohlcen\u00e9 vzorkem b\u011bhem n\u00e1razu. Tuto zkou\u0161ku lze prov\u00e9st dv\u011bma postupy: Postup A<\/strong> a Postup B<\/strong>. Oba postupy se pou\u017e\u00edvaj\u00ed k testov\u00e1n\u00ed odolnost plastov\u00fdch f\u00f3li\u00ed proti n\u00e1razu<\/strong>, ale li\u0161\u00ed se velikost\u00ed vzorku a \u00farovn\u00ed energie pou\u017eit\u00e9 p\u0159i zkou\u0161ce. Hodnoty energie pou\u017e\u00edvan\u00e9 v postupu A jsou obvykle men\u0161\u00ed a je vhodn\u011bj\u0161\u00ed pro zkou\u0161en\u00ed ten\u010d\u00edch materi\u00e1l\u016f, zat\u00edmco postup B zahrnuje vy\u0161\u0161\u00ed \u00farovn\u011b energie pro zkou\u0161en\u00ed siln\u011bj\u0161\u00edch nebo robustn\u011bj\u0161\u00edch materi\u00e1l\u016f.<\/p>\n\n\n\n

Postup a normy pro zkou\u0161en\u00ed odolnosti proti n\u00e1razu<\/h2>\n\n\n\n

ASTM D3420<\/strong> popisuje postup pro prov\u00e1d\u011bn\u00ed Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong>. Postup zahrnuje v\u00fdb\u011br vhodn\u00e9 \u00farovn\u011b energie pro kyvadlo, p\u0159\u00edpravu vzorku a proveden\u00ed zkou\u0161ky za kontrolovan\u00fdch podm\u00ednek. Vzorek se upne mezi dv\u011b desky s definovan\u00fdm kruhov\u00fdm otvorem a kyvadlo se uvoln\u00ed, aby ude\u0159ilo do vzorku.<\/p>\n\n\n\n

B\u011bhem testu se kyvadlov\u00fd n\u00e1razov\u00fd tester<\/strong> m\u011b\u0159\u00ed energii pot\u0159ebnou k rozbit\u00ed nebo prop\u00edchnut\u00ed vzorku. V\u00fdsledky se ur\u010duj\u00ed podle \u00fadaje na stupnici, kter\u00fd se pou\u017e\u00edv\u00e1 k v\u00fdpo\u010dtu energie k protr\u017een\u00ed. Oba postupy, postup A a postup B, jsou podobn\u00e9, ale li\u0161\u00ed se velikost\u00ed vzorku a \u00farovn\u00ed energie. Pro Postup A<\/strong>, pou\u017e\u00edv\u00e1 se clona 60 mm a kyvadlo se uvol\u0148uje p\u0159i ni\u017e\u0161\u00ed \u00farovni energie. Na adrese Postup B<\/strong>, je pou\u017eit v\u011bt\u0161\u00ed otvor o pr\u016fm\u011bru 89 mm s vy\u0161\u0161\u00ed \u00farovn\u00ed energie vhodn\u00fd pro testov\u00e1n\u00ed siln\u011bj\u0161\u00edch materi\u00e1l\u016f.<\/p>\n\n\n\n

Pro\u010d je norma ASTM D3420 d\u016fle\u017eit\u00e1 pro pr\u016fmyslov\u00e9 aplikace?<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong> je neoceniteln\u00fdm n\u00e1strojem v mnoha pr\u016fmyslov\u00fdch odv\u011btv\u00edch, kde je hou\u017eevnatost materi\u00e1lu rozhoduj\u00edc\u00ed. A\u0165 u\u017e se jedn\u00e1 o plastov\u00e9 obaly<\/strong>, automobilov\u00e9 komponenty<\/strong>, nebo stavebn\u00ed materi\u00e1ly<\/strong>, je z\u00e1sadn\u00ed schopnost odol\u00e1vat n\u00e1raz\u016fm. Nap\u0159\u00edklad obalov\u00e9 materi\u00e1ly mus\u00ed b\u00fdt dostate\u010dn\u011b odoln\u00e9, aby chr\u00e1nily obsah b\u011bhem p\u0159epravy a manipulace. Plastov\u00e9 f\u00f3lie pou\u017e\u00edvan\u00e9 v t\u011bchto aplikac\u00edch mus\u00ed odol\u00e1vat tlaku, vibrac\u00edm a n\u00e1razov\u00fdm sil\u00e1m, ani\u017e by do\u0161lo k jejich po\u0161kozen\u00ed.<\/p>\n\n\n\n

Na str\u00e1nk\u00e1ch Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong> zaji\u0161\u0165uje, aby materi\u00e1ly spl\u0148ovaly konkr\u00e9tn\u00ed v\u00fdkonnostn\u00ed normy, co\u017e v\u00fdrobc\u016fm pom\u00e1h\u00e1 p\u0159i v\u00fdb\u011bru spr\u00e1vn\u00fdch materi\u00e1l\u016f pro jejich v\u00fdrobky. Spln\u011bn\u00edm po\u017eadavk\u016f ASTM D3420<\/strong>, mohou v\u00fdrobci zajistit, \u017ee jejich materi\u00e1ly spl\u0148uj\u00ed pot\u0159ebn\u00e9 normy odolnosti a budou spolehliv\u011b fungovat v re\u00e1ln\u00fdch podm\u00ednk\u00e1ch.<\/p>\n\n\n\n

Aplikace kyvadlov\u00e9 zkou\u0161ky odolnosti proti n\u00e1razu<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong> je \u0161iroce pou\u017e\u00edv\u00e1n v obalov\u00fd pr\u016fmysl<\/strong> k hodnocen\u00ed trvanlivosti materi\u00e1l\u016f, jako jsou plastov\u00e9 f\u00f3lie a n\u00e1t\u011bry. V pr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako jsou potravin\u00e1\u0159sk\u00e9 obaly, l\u00e9\u010diva a zdravotnick\u00e9 prost\u0159edky, je odolnost f\u00f3li\u00ed proti n\u00e1razu rozhoduj\u00edc\u00edm faktorem p\u0159i ur\u010dov\u00e1n\u00ed kvality v\u00fdrobk\u016f. Obaly, kter\u00e9 neodolaj\u00ed n\u00e1razu, mohou m\u00edt za n\u00e1sledek po\u0161kozen\u00ed zbo\u017e\u00ed, co\u017e vede ke ztr\u00e1t\u00e1m a m\u016f\u017ee po\u0161kodit d\u016fv\u011bru spot\u0159ebitel\u016f.<\/p>\n\n\n\n

Test se tak\u00e9 pou\u017e\u00edv\u00e1 k hodnocen\u00ed materi\u00e1l\u016f v oblasti automobilov\u00fd pr\u016fmysl<\/strong> a stavba<\/strong> v pr\u016fmyslov\u00fdch odv\u011btv\u00edch, kde je odolnost kl\u00ed\u010dov\u00e1 pro bezpe\u010dnost a \u017eivotnost v\u00fdrobk\u016f. Stanoven\u00edm odolnosti materi\u00e1lu proti n\u00e1razu mohou spole\u010dnosti zajistit, aby jejich v\u00fdrobky spl\u0148ovaly po\u017eadovan\u00e9 normy pro v\u00fdkon a bezpe\u010dnost.<\/p>\n\n\n\n

V\u00fdhody pou\u017eit\u00ed kyvadlov\u00e9 r\u00e1zov\u00e9 zkou\u0161ky pro hodnocen\u00ed materi\u00e1l\u016f<\/h2>\n\n\n\n

Jednou z hlavn\u00edch v\u00fdhod pou\u017e\u00edv\u00e1n\u00ed Kyvadlov\u00fd n\u00e1razov\u00fd tester<\/strong> je jeho schopnost simulovat re\u00e1ln\u00e9 podm\u00ednky, kdy materi\u00e1ly \u010del\u00ed n\u00e1hl\u00e9mu mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed. Na rozd\u00edl od statick\u00fdch zkou\u0161ek, kter\u00e9 m\u011b\u0159\u00ed pouze odezvu materi\u00e1lu na spojit\u00e9 s\u00edly, kyvadlov\u00e1 zkou\u0161ka napodobuje rychl\u00e9 n\u00e1razy, kter\u00e9 materi\u00e1ly \u010dasto za\u017e\u00edvaj\u00ed b\u011bhem sv\u00e9ho \u017eivotn\u00edho cyklu. D\u00edky tomu jsou v\u00fdsledky zkou\u0161ky vysoce relevantn\u00ed pro skute\u010dnou v\u00fdkonnost v ter\u00e9nu.<\/p>\n\n\n\n

Kyvadlov\u00e1 zkou\u0161ka se nav\u00edc snadno prov\u00e1d\u00ed a poskytuje rychl\u00e9 v\u00fdsledky, co\u017e z n\u00ed \u010din\u00ed cenn\u00fd n\u00e1stroj pro kontrolu kvality b\u011bhem v\u00fdroby. Integrac\u00ed Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong> do v\u00fdrobn\u00edho procesu, mohou spole\u010dnosti zajistit konzistentn\u00ed kvalitu v\u00fdrobk\u016f a minimalizovat riziko poruch.<\/p>\n\n\n\n

Z\u00e1v\u011br: \u00daloha normy ASTM D3420 p\u0159i kontrole kvality<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch Zkou\u0161ka odolnosti proti kyvadlov\u00e9mu n\u00e1razu<\/strong>, jak je definov\u00e1no v ASTM D3420<\/strong>je z\u00e1kladn\u00ed zkou\u0161kou pro stanoven\u00ed odolnosti plastov\u00fdch materi\u00e1l\u016f proti n\u00e1razu. Poskytuje z\u00e1sadn\u00ed \u00fadaje, kter\u00e9 v\u00fdrobc\u016fm pom\u00e1haj\u00ed p\u0159i v\u00fdb\u011bru spr\u00e1vn\u00fdch materi\u00e1l\u016f pro jejich v\u00fdrobky a zaji\u0161\u0165uj\u00ed, aby odolaly sil\u00e1m, s nimi\u017e se setk\u00e1vaj\u00ed p\u0159i pou\u017e\u00edv\u00e1n\u00ed. Tato zkou\u0161ka je obzvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e1 v pr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako jsou nap\u0159\u00edklad obaly, kde je odolnost materi\u00e1lu z\u00e1sadn\u00ed pro integritu v\u00fdrobku.<\/p>\n\n\n\n

Vyu\u017eit\u00edm Kyvadlov\u00fd n\u00e1razov\u00fd tester<\/strong> kter\u00e9 dodr\u017euj\u00ed normy ASTM, mohou v\u00fdrobci zajistit, \u017ee jejich v\u00fdrobky spl\u0148uj\u00ed po\u017eadovan\u00e1 krit\u00e9ria v\u00fdkonnosti, \u010d\u00edm\u017e se sni\u017euje riziko selh\u00e1n\u00ed a zlep\u0161uje celkov\u00e1 kvalita v\u00fdrobk\u016f. A\u0165 u\u017e se jedn\u00e1 o obalov\u00e9 materi\u00e1ly nebo sou\u010d\u00e1sti pou\u017e\u00edvan\u00e9 v jin\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch, kyvadlov\u00e1 zkou\u0161ka odolnosti proti n\u00e1razu je spolehlivou a p\u0159esnou metodou hodnocen\u00ed hou\u017eevnatosti materi\u00e1lu.<\/p>","protected":false},"excerpt":{"rendered":"

P\u0159ehled kyvadlov\u00e9 zkou\u0161ky odolnosti proti n\u00e1razu Kyvadlov\u00e1 zkou\u0161ka odolnosti proti n\u00e1razu je kl\u00ed\u010dovou metodou hodnocen\u00ed pou\u017e\u00edvanou ke stanoven\u00ed odolnosti plastov\u00fdch materi\u00e1l\u016f, zejm\u00e9na f\u00f3li\u00ed, kter\u00e9 se \u010dasto pou\u017e\u00edvaj\u00ed v obalov\u00e9m a stavebn\u00edm pr\u016fmyslu a v r\u016fzn\u00fdch dal\u0161\u00edch odv\u011btv\u00edch. Tato zkou\u0161ka simuluje re\u00e1ln\u00e9 podm\u00ednky t\u00edm, \u017ee hodnot\u00ed, jak materi\u00e1ly reaguj\u00ed p\u0159i n\u00e1hl\u00e9m n\u00e1razu. [...]","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-234","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/posts\/234","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/comments?post=234"}],"version-history":[{"count":3,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/posts\/234\/revisions"}],"predecessor-version":[{"id":238,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/posts\/234\/revisions\/238"}],"wp:attachment":[{"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/media?parent=234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/categories?post=234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.impacttesting.net\/cs\/wp-json\/wp\/v2\/tags?post=234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}