{"id":1253,"date":"2026-01-05T01:17:17","date_gmt":"2026-01-05T01:17:17","guid":{"rendered":"https:\/\/www.wrapfilmtest.com\/?p=1253"},"modified":"2026-01-15T06:03:48","modified_gmt":"2026-01-15T06:03:48","slug":"tensile-testing-of-polymers","status":"publish","type":"post","link":"https:\/\/www.wrapfilmtest.com\/cs\/tensile-testing-of-polymers","title":{"rendered":"Zkou\u0161ky polymer\u016f v tahu: jak norma ASTM D638 zaji\u0161\u0165uje p\u0159esn\u00e9 hodnocen\u00ed vlastnost\u00ed materi\u00e1lu"},"content":{"rendered":"

\u00davod<\/h2>\n\n\n\n

Zkou\u0161ky polymer\u016f v tahu jsou d\u016fle\u017eit\u00fdm procesem, kter\u00fd se pou\u017e\u00edv\u00e1 k hodnocen\u00ed mechanick\u00fdch vlastnost\u00ed plastov\u00fdch materi\u00e1l\u016f. Tato zkou\u0161ka m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro ur\u010den\u00ed toho, jak se bude polymer chovat p\u0159i nam\u00e1h\u00e1n\u00ed a deformaci, a poskytuje cenn\u00e9 informace o jeho trvanlivosti a celkov\u00e9 pevnosti. Mezi r\u016fzn\u00e9 normy pou\u017e\u00edvan\u00e9 pro testov\u00e1n\u00ed polymer\u016f pat\u0159\u00ed nap\u0159, ASTM D638<\/strong> je jednou z nejuzn\u00e1van\u011bj\u0161\u00edch metod hodnocen\u00ed tahov\u00fdch vlastnost\u00ed plast\u016f.<\/p>\n\n\n\n

Tento \u010dl\u00e1nek se zab\u00fdv\u00e1 tahov\u00e9 zkou\u0161ky polymer\u016f<\/strong>, se zam\u011b\u0159en\u00edm na ASTM D638<\/strong> standard, kter\u00fd se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 k m\u011b\u0159en\u00ed vlastnost\u00ed, jako je nap\u0159. mez kluzu<\/strong>, pevnost v tahu<\/strong>a celkov\u00fd tahov\u00e9 vlastnosti plast\u016f<\/strong>.<\/p>\n\n\n\n

\"Zkou\u0161ky<\/a><\/figure>\n\n\n\n
\n\n\n\n

Co je to tahov\u00e1 zkou\u0161ka polymer\u016f?<\/h2>\n\n\n\n

Zkou\u0161ka tahem je proces p\u016fsoben\u00ed jednoos\u00e9 s\u00edly na materi\u00e1l, typicky na plastov\u00fd vzorek<\/strong>, dokud nedojde k jeho selh\u00e1n\u00ed (zlomen\u00ed nebo deformaci). C\u00edlem t\u00e9to zkou\u0161ky je posoudit, jak se materi\u00e1l chov\u00e1 p\u0159i nam\u00e1h\u00e1n\u00ed a deformaci, a zm\u011b\u0159it jeho schopnost rozta\u017een\u00ed nebo odolnosti proti prodlou\u017een\u00ed p\u0159ed poru\u0161en\u00edm.<\/p>\n\n\n\n

Hlavn\u00ed parametry m\u011b\u0159en\u00e9 v tahov\u00e9 zkou\u0161ky<\/strong> zahrnuj\u00ed:<\/p>\n\n\n\n

Prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong>: Procentu\u00e1ln\u00ed n\u00e1r\u016fst d\u00e9lky, kter\u00fd materi\u00e1l vydr\u017e\u00ed, ne\u017e se p\u0159etrhne, co\u017e ud\u00e1v\u00e1 jeho ta\u017enost a schopnost se prot\u00e1hnout bez poru\u0161en\u00ed.<\/p>\n\n\n\n

Pevnost v tahu<\/strong>: Maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9mu materi\u00e1l odol\u00e1, ani\u017e by do\u0161lo k jeho poru\u0161e. Tato vlastnost je rozhoduj\u00edc\u00ed pro ur\u010den\u00ed toho, jak se bude materi\u00e1l chovat p\u0159i p\u016fsoben\u00ed vn\u011bj\u0161\u00edch sil v re\u00e1ln\u00fdch aplikac\u00edch.<\/p>\n\n\n\n

Pevnost v tahu<\/strong>: Velikost nap\u011bt\u00ed, kter\u00e9 materi\u00e1l vydr\u017e\u00ed, ne\u017e se za\u010dne plasticky deformovat. Tato vlastnost je d\u016fle\u017eit\u00e1 zejm\u00e9na pro zaji\u0161t\u011bn\u00ed toho, aby si materi\u00e1l p\u0159i nam\u00e1h\u00e1n\u00ed zachoval svou struktur\u00e1ln\u00ed integritu.<\/p>\n\n\n\n

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ASTM D638: Norma pro zkou\u0161en\u00ed polymer\u016f v tahu<\/h2>\n\n\n\n

ASTM D638<\/strong> je standardn\u00ed zku\u0161ebn\u00ed metoda pou\u017e\u00edvan\u00e1 ke stanoven\u00ed tahov\u00fdch vlastnost\u00ed plastov\u00fdch materi\u00e1l\u016f. Tato norma se vztahuje zejm\u00e9na na zkou\u0161en\u00ed vzorky ve tvaru \u010dinky<\/strong> a vyztu\u017een\u00fdch plast\u016f za kontrolovan\u00fdch podm\u00ednek, jako je teplota, vlhkost a rychlost zku\u0161ebn\u00edho stroje.<\/p>\n\n\n\n

Kl\u00ed\u010dov\u00e9 aspekty normy ASTM D638<\/h3>\n\n\n\n

Zku\u0161ebn\u00ed vzorky<\/strong>: Zkou\u0161ka se obvykle prov\u00e1d\u00ed na vzorc\u00edch, kter\u00e9 jsou ve tvaru \u010dinky<\/strong> nebo jin\u00e9 vhodn\u00e9 formy v z\u00e1vislosti na materi\u00e1lu. Norma rovn\u011b\u017e uv\u00e1d\u00ed rozm\u011bry a tlou\u0161\u0165ku vzorku, aby byly zaji\u0161t\u011bny jednotn\u00e9 v\u00fdsledky.<\/p>\n\n\n\n

Podm\u00ednky testov\u00e1n\u00ed<\/strong>: Norma ASTM D638 vy\u017eaduje kontrolu zku\u0161ebn\u00edho prost\u0159ed\u00ed, v\u010detn\u011b teploty a vlhkosti. T\u00edm je zaji\u0161t\u011bna p\u0159esnost v\u00fdsledk\u016f a hodnocen\u00ed materi\u00e1lu v co nejre\u00e1ln\u011bj\u0161\u00edch podm\u00ednk\u00e1ch.<\/p>\n\n\n\n

Testovac\u00ed stroj<\/strong>: Zkou\u0161ka se prov\u00e1d\u00ed na zku\u0161ebn\u00edm stroji s konstantn\u00ed rychlost\u00ed k\u0159\u00ed\u017eov\u00e9ho pohybu, kter\u00fd p\u016fsob\u00ed tahem, dokud nedojde k poru\u0161en\u00ed vzorku. Tento stroj mus\u00ed b\u00fdt kalibrov\u00e1n, aby se zajistila spr\u00e1vn\u00e1 hodnota. zkou\u0161ka pevnosti v tahu<\/strong> v\u00fdsledky.<\/p>\n\n\n\n

Rychlost testov\u00e1n\u00ed<\/strong>: Rychlost, jakou je materi\u00e1l ta\u017een, hraje v\u00fdznamnou roli ve v\u00fdsledc\u00edch. Norma ASTM D638 uv\u00e1d\u00ed zku\u0161ebn\u00ed rychlosti pro r\u016fzn\u00e9 typy polymer\u016f a tlou\u0161\u0165ky vzork\u016f.<\/p>\n\n\n\n

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V\u00fdznam meze kluzu a pevnosti v tahu p\u0159i zkou\u0161en\u00ed polymer\u016f<\/h2>\n\n\n\n

Zkou\u0161ka pevnosti v tahu<\/strong>: Jedno z hlavn\u00edch m\u011b\u0159en\u00ed v tahov\u00e9 zkou\u0161ky polymer\u016f<\/strong> je pevnost v tahu<\/strong>, kter\u00fd ud\u00e1v\u00e1 maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9 materi\u00e1l vydr\u017e\u00ed, ne\u017e se poru\u0161\u00ed. Tato hodnota je z\u00e1sadn\u00ed pro ur\u010den\u00ed toho, jak se bude polymer chovat p\u0159i zat\u00ed\u017een\u00ed v re\u00e1ln\u00fdch aplikac\u00edch.<\/p>\n\n\n\n

Pevnost v tahu<\/strong>: The mez kluzu<\/strong> je dal\u0161\u00edm kritick\u00fdm faktorem, kter\u00fd p\u0159edstavuje velikost nap\u011bt\u00ed, kter\u00e9 m\u016f\u017ee polymer vydr\u017eet, ne\u017e se trvale zdeformuje. Pochopen\u00ed t\u00e9to vlastnosti je z\u00e1sadn\u00ed pro zaji\u0161t\u011bn\u00ed toho, aby si materi\u00e1l p\u0159i nam\u00e1h\u00e1n\u00ed zachoval svou struktur\u00e1ln\u00ed integritu.<\/p>\n\n\n\n

Prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong>: Zkou\u0161ka v tahu rovn\u011b\u017e poskytuje \u00fadaje o prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong>, kter\u00e1 ud\u00e1v\u00e1, jak moc se materi\u00e1l m\u016f\u017ee rozt\u00e1hnout, ne\u017e se zlom\u00ed. Jedn\u00e1 se o kl\u00ed\u010dov\u00fd faktor pro pochopen\u00ed pru\u017enosti a ta\u017enosti polymer\u016f.<\/p>\n\n\n\n

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Pochopen\u00ed tahov\u00fdch vlastnost\u00ed polymer\u016f<\/h2>\n\n\n\n

1. Pevnost v tahu<\/strong><\/h4>\n\n\n\n

The pevnost v tahu<\/strong> polymeru je maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9 vydr\u017e\u00ed p\u0159i natahov\u00e1n\u00ed. Tato vlastnost je d\u016fle\u017eit\u00e1 zejm\u00e9na pro materi\u00e1ly pou\u017e\u00edvan\u00e9 v technick\u00e9 aplikace<\/strong> kde bude materi\u00e1l vystaven vn\u011bj\u0161\u00edm sil\u00e1m.<\/p>\n\n\n\n

Nap\u0159\u00edklad obalov\u00e9 materi\u00e1ly, automobilov\u00e9 komponenty a zdravotnick\u00e9 prost\u0159edky \u010dasto vy\u017eaduj\u00ed plasty s vysokou pevnost\u00ed v tahu, aby odolaly mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed p\u0159i pou\u017e\u00edv\u00e1n\u00ed, manipulaci a p\u0159eprav\u011b.<\/p>\n\n\n\n

2. Pevnost v tahu<\/strong><\/h4>\n\n\n\n

The mez kluzu<\/strong> je bod, kdy se polymer za\u010d\u00edn\u00e1 trvale deformovat. Za t\u00edmto bodem se materi\u00e1l po odstran\u011bn\u00ed s\u00edly nevr\u00e1t\u00ed do p\u016fvodn\u00edho tvaru.<\/p>\n\n\n\n

V praktick\u00fdch aplikac\u00edch, mez kluzu<\/strong> je d\u016fle\u017eit\u00e1, proto\u017ee u materi\u00e1l\u016f vystaven\u00fdch nam\u00e1h\u00e1n\u00ed v bl\u00edzkosti tohoto bodu nebo nad n\u00edm m\u016f\u017ee doj\u00edt k trval\u00e9 deformaci, kter\u00e1 by mohla ohrozit struktur\u00e1ln\u00ed integritu materi\u00e1lu. Nap\u0159\u00edklad u obal\u016f je mez kluzu z\u00e1sadn\u00ed pro zaji\u0161t\u011bn\u00ed toho, aby si obal zachoval sv\u016fj tvar pod t\u00edhou sv\u00e9ho obsahu.<\/p>\n\n\n\n

3. Prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong><\/h4>\n\n\n\n

Prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong> m\u011b\u0159\u00ed, do jak\u00e9 m\u00edry se m\u016f\u017ee polymer nat\u00e1hnout, ne\u017e se p\u0159etrhne. Vy\u0161\u0161\u00ed prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed znamen\u00e1, \u017ee materi\u00e1l je pru\u017en\u011bj\u0161\u00ed, co\u017e m\u016f\u017ee b\u00fdt u\u017eite\u010dn\u00e9 v aplikac\u00edch, kde je vy\u017eadov\u00e1na pru\u017enost a rozta\u017eitelnost, nap\u0159\u00edklad u stre\u010dov\u00fdch f\u00f3li\u00ed a l\u00e9ka\u0159sk\u00fdch hadi\u010dek.<\/p>\n\n\n\n

Zat\u00edmco pevnost v tahu<\/strong> je rozhoduj\u00edc\u00ed pro integritu konstrukce, prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong> pom\u00e1h\u00e1 ur\u010dit, do jak\u00e9 m\u00edry se materi\u00e1l m\u016f\u017ee rozt\u00e1hnout, ne\u017e sel\u017ee, a poskytuje tak d\u016fle\u017eit\u00e9 \u00fadaje o jeho kvalit\u011b. tv\u00e1rnost<\/strong> a odolnost<\/strong>.<\/p>\n\n\n\n

Aplikace tahov\u00fdch zkou\u0161ek polymer\u016f<\/h2>\n\n\n\n

1. obalov\u00fd pr\u016fmysl<\/strong><\/h4>\n\n\n\n

V balen\u00ed, tahov\u00e9 zkou\u0161ky polymer\u016f<\/strong> pom\u00e1h\u00e1 ur\u010dit pevnost<\/strong> a trvanlivost<\/strong> materi\u00e1l\u016f, jako jsou plastov\u00e9 f\u00f3lie, l\u00e1hve a n\u00e1doby. Toto testov\u00e1n\u00ed zaji\u0161\u0165uje, \u017ee materi\u00e1l vydr\u017e\u00ed mechanick\u00e9 nam\u00e1h\u00e1n\u00ed p\u0159i p\u0159eprav\u011b, skladov\u00e1n\u00ed a manipulaci a p\u0159itom si zachov\u00e1 svou integritu.<\/p>\n\n\n\n

Nap\u0159\u00edklad plastov\u00e9 f\u00f3lie pou\u017e\u00edvan\u00e9 v obalech na potraviny mus\u00ed odol\u00e1vat prop\u00edchnut\u00ed a roztr\u017een\u00ed, ani\u017e by se rozbily, zat\u00edmco lahve mus\u00ed odol\u00e1vat vnit\u0159n\u00edm tlak\u016fm a vn\u011bj\u0161\u00edm sil\u00e1m. Zkou\u0161ka v tahu<\/strong> zaji\u0161\u0165uje, \u017ee tyto materi\u00e1ly spl\u0148uj\u00ed specifick\u00e9 v\u00fdkonnostn\u00ed normy<\/strong> p\u0159ed jejich s\u00e9riovou v\u00fdrobou.<\/p>\n\n\n\n

2. Zdravotnick\u00e9 prost\u0159edky a l\u00e9\u010diva<\/strong><\/h4>\n\n\n\n

U zdravotnick\u00fdch prost\u0159edk\u016f a farmaceutick\u00fdch obal\u016f mus\u00ed b\u00fdt materi\u00e1ly nejen pevn\u00e9, ale tak\u00e9 bezpe\u010dn\u00e9 a spolehliv\u00e9. Na str\u00e1nk\u00e1ch . mez kluzu<\/strong> a pevnost v tahu<\/strong> polymer\u016f pou\u017e\u00edvan\u00fdch v t\u011bchto aplikac\u00edch pom\u00e1haj\u00ed zajistit, aby p\u0159i b\u011b\u017en\u00e9m zach\u00e1zen\u00ed nebo p\u0159i nam\u00e1h\u00e1n\u00ed b\u011bhem pou\u017e\u00edv\u00e1n\u00ed nepraskaly a nedeformovaly se.<\/p>\n\n\n\n

Nap\u0159\u00edklad, zdravotnick\u00e9 obalov\u00e9 materi\u00e1ly<\/strong> jako jsou infuzn\u00ed vaky a injek\u010dn\u00ed st\u0159\u00edka\u010dky, si mus\u00ed zachovat integritu a z\u00e1rove\u0148 odol\u00e1vat tlaku nebo mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed b\u011bhem pou\u017e\u00edv\u00e1n\u00ed, aby bylo zaji\u0161t\u011bno, \u017ee l\u00e9ky z\u016fstanou bezpe\u010dn\u00e9 a steriln\u00ed.<\/p>\n\n\n\n

3. Automobilov\u00fd a leteck\u00fd pr\u016fmysl<\/strong><\/h4>\n\n\n\n

V automobilov\u00e9m a leteck\u00e9m pr\u016fmyslu se tahov\u00e9 vlastnosti polymer\u016f<\/strong> maj\u00ed z\u00e1sadn\u00ed v\u00fdznam pro zaji\u0161t\u011bn\u00ed toho, aby d\u00edly vydr\u017eely zna\u010dn\u00e9 nam\u00e1h\u00e1n\u00ed bez poruchy. Nap\u0159\u00edklad, polymern\u00ed kompozity<\/strong> pou\u017e\u00edvan\u00e9 v karoseri\u00edch vozidel nebo v leteck\u00fdch konstrukc\u00edch mus\u00ed b\u00fdt schopn\u00e9 sn\u00e1\u0161et zat\u00ed\u017een\u00ed, odol\u00e1vat n\u00e1raz\u016fm a dlouhodob\u011b odol\u00e1vat mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed.<\/p>\n\n\n\n

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Z\u00e1v\u011br<\/h2>\n\n\n\n

Zkou\u0161ky polymer\u016f v tahu<\/strong> je d\u016fle\u017eit\u00fdm aspektem v\u011bdy o materi\u00e1lech a kontroly kvality. Pomoc\u00ed ASTM D638<\/strong>, mohou v\u00fdrobci p\u0159esn\u011b vyhodnotit pevnost v tahu<\/strong>, mez kluzu<\/strong>a prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong> polymern\u00edch materi\u00e1l\u016f a zaji\u0161\u0165uje, aby spl\u0148ovaly po\u017eadavky na v\u00fdkon pro r\u016fzn\u00e9 aplikace.<\/p>\n\n\n\n

A\u0165 u\u017e v obal<\/strong>, zdravotnick\u00e9 prost\u0159edky<\/strong>nebo automobilov\u00e9 in\u017een\u00fdrstv\u00ed<\/strong>, porozum\u011bn\u00ed tahov\u00e9 vlastnosti<\/strong> polymer\u016f je z\u00e1sadn\u00ed pro navrhov\u00e1n\u00ed materi\u00e1l\u016f, kter\u00e9 jsou odoln\u00e9, bezpe\u010dn\u00e9 a vhodn\u00e9 pro dan\u00fd \u00fa\u010del. Se spr\u00e1vn\u00fdm za\u0159\u00edzen\u00ed pro tahov\u00e9 zkou\u0161ky<\/strong>, jako nap\u0159. Tahov\u00e9 zkou\u0161e\u010dky Cell Instruments<\/strong>, m\u016f\u017eete zajistit konzistenci a spolehlivost sv\u00fdch v\u00fdrobk\u016f, co\u017e v\u00e1m pom\u016f\u017ee udr\u017eet vysok\u00e9 standardy a splnit regula\u010dn\u00ed po\u017eadavky.<\/p>\n\n\n\n

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\u010cASTO KLADEN\u00c9 DOTAZY<\/h2>\n\n\n\n

1.Jak\u00e1 je pevnost polymeru v tahu?<\/strong><\/p>\n\n\n\n

Pevnost v tahu<\/strong> polymeru ozna\u010duje maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9 materi\u00e1l vydr\u017e\u00ed p\u0159i natahov\u00e1n\u00ed, ne\u017e se p\u0159etrhne. Tato vlastnost m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro zaji\u0161t\u011bn\u00ed mechanick\u00e9 pevnosti polymer\u016f v r\u016fzn\u00fdch aplikac\u00edch, jako jsou obaly, automobilov\u00e9 d\u00edly a zdravotnick\u00e9 prost\u0159edky.<\/p>\n\n\n\n

2.Na co se vztahuje zku\u0161ebn\u00ed metoda ASTM D638?<\/strong><\/p>\n\n\n\n

The ASTM D638<\/strong> standardn\u00ed zku\u0161ebn\u00ed metoda je pou\u017eiteln\u00e1 pro v\u011bt\u0161inu polymern\u00edch materi\u00e1l\u016f, v\u010detn\u011b f\u00f3li\u00ed, plast\u016f, pry\u017e\u00ed a kompozit\u016f. M\u011b\u0159\u00ed pevnost v tahu<\/strong>, mez kluzu<\/strong>a prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/strong> materi\u00e1l\u016f, co\u017e je nezbytn\u00e9 pro kontrolu kvality, technick\u00e9 navrhov\u00e1n\u00ed a v\u00fdvoj materi\u00e1l\u016f.<\/p>\n\n\n\n

3.Pro\u010d je nutn\u00e9 prov\u00e1d\u011bt tahov\u00e9 zkou\u0161ky?<\/strong><\/p>\n\n\n\n

Zkou\u0161ka v tahu<\/strong> pom\u00e1h\u00e1 ur\u010dit, jak se materi\u00e1ly chovaj\u00ed p\u0159i nam\u00e1h\u00e1n\u00ed, a pou\u017e\u00edv\u00e1 se k hodnocen\u00ed jejich v\u00fdkonnosti v re\u00e1ln\u00fdch aplikac\u00edch. M\u011b\u0159en\u00edm vlastnost\u00ed, jako jsou modul pru\u017enosti<\/strong>, bod v\u00fdnosu<\/strong>a maxim\u00e1ln\u00ed pevnost v tahu<\/strong>, tahov\u00e9 zkou\u0161ky zaji\u0161\u0165uj\u00ed, \u017ee materi\u00e1ly spl\u0148uj\u00ed konstruk\u010dn\u00ed a v\u00fdkonnostn\u00ed po\u017eadavky.<\/p>\n\n\n\n

4.Jak\u00fd je rozd\u00edl mezi mez\u00ed kluzu a pevnost\u00ed v tahu?<\/strong><\/p>\n\n\n\n

Pevnost v tahu<\/strong> ozna\u010duje maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9mu m\u016f\u017ee materi\u00e1l odolat, ani\u017e by do\u0161lo k jeho trval\u00e9 deformaci, zat\u00edmco pevnost v tahu<\/strong> je maxim\u00e1ln\u00ed nap\u011bt\u00ed, kter\u00e9 materi\u00e1l vydr\u017e\u00ed, ne\u017e se zlom\u00ed. Jin\u00fdmi slovy, mez kluzu ozna\u010duje bod, kdy se materi\u00e1l za\u010d\u00edn\u00e1 deformovat, a mez pevnosti v tahu ozna\u010duje bod, kdy doch\u00e1z\u00ed k jeho poru\u0161en\u00ed.<\/p>\n\n\n\n

5.Jak vybrat spr\u00e1vn\u00fd stroj pro tahov\u00e9 zkou\u0161ky?<\/strong><\/p>\n\n\n\n

P\u0159i v\u00fdb\u011bru tahov\u00e9ho zku\u0161ebn\u00edho stroje je d\u016fle\u017eit\u00e9 vybrat takov\u00fd, kter\u00fd odpov\u00edd\u00e1 vlastnostem materi\u00e1lu a po\u017eadavk\u016fm na zkou\u0161en\u00ed. Pro pru\u017en\u00e9 materi\u00e1ly, jako jsou f\u00f3lie, je ide\u00e1ln\u00ed vysoce p\u0159esn\u00fd tester s n\u00edzk\u00fdm zat\u00ed\u017een\u00edm. Pro siln\u011bj\u0161\u00ed nebo tuh\u00e9 polymery je nutn\u00fd stroj s vy\u0161\u0161\u00ed nosnost\u00ed a p\u0159esn\u00fdm ovl\u00e1d\u00e1n\u00edm. Zaji\u0161t\u011bn\u00ed shody stroje s normami, jako nap\u0159. ASTM D638<\/strong> je kl\u00ed\u010dem k z\u00edsk\u00e1n\u00ed spolehliv\u00fdch v\u00fdsledk\u016f.<\/p>","protected":false},"excerpt":{"rendered":"

\u00davod Zkou\u0161ky polymer\u016f v tahu jsou d\u016fle\u017eit\u00fdm procesem pou\u017e\u00edvan\u00fdm k hodnocen\u00ed mechanick\u00fdch vlastnost\u00ed plastov\u00fdch materi\u00e1l\u016f. Tato zkou\u0161ka m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro ur\u010den\u00ed toho, jak se bude polymer chovat p\u0159i nam\u00e1h\u00e1n\u00ed a deformaci, a poskytuje cenn\u00e9 informace o jeho trvanlivosti a celkov\u00e9 pevnosti. Mezi r\u016fzn\u00fdmi normami pou\u017e\u00edvan\u00fdmi pro zkou\u0161en\u00ed polymer\u016f vynik\u00e1 norma ASTM D638, kter\u00e1 je ur\u010dena pro [...]","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1253","post","type-post","status-publish","format-standard","hentry","category-wrap-film-test"],"yoast_head":"\nTensile Testing of Polymers: Understanding ASTM D638 for Plastic Material Testing<\/title>\n<meta name=\"description\" content=\"Learn how tensile testing of polymers, specifically ASTM D638, helps evaluate tensile strength, yield strength, and other critical properties of plastic materials for better quality control and engineering design.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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