{"id":634,"date":"2026-02-26T06:17:51","date_gmt":"2026-02-26T06:17:51","guid":{"rendered":"https:\/\/www.teartester.com\/?post_type=standard&#038;p=634"},"modified":"2026-02-28T08:22:07","modified_gmt":"2026-02-28T08:22:07","slug":"astm-d624","status":"publish","type":"standard","link":"https:\/\/www.teartester.com\/cs\/standard\/astm-d624\/","title":{"rendered":"ASTM D624"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Pevnost gumy v tahu: Pro\u010d je d\u016fle\u017eit\u00e1 norma ASTM D624?<\/h2>\n\n\n\n<p>Poruchy v d\u016fsledku roztr\u017een\u00ed jsou \u010dastou p\u0159\u00ed\u010dinou servisn\u00edch poruch pry\u017eov\u00fdch a elastomerov\u00fdch v\u00fdrobk\u016f. Pokud jsou elastomery vystaveny koncentraci nap\u011bt\u00ed, \u0159ez\u016fm nebo defekt\u016fm, mohou se postupn\u011b \u0161\u00ed\u0159it trhliny, kter\u00e9 nakonec vedou k roztr\u017een\u00ed materi\u00e1lu. Na str\u00e1nk\u00e1ch <strong>pevnost pry\u017ee v roztr\u017een\u00ed<\/strong> hodnocen\u00ed podle normy ASTM D624 pom\u00e1h\u00e1 in\u017een\u00fdr\u016fm pochopit, jak materi\u00e1ly reaguj\u00ed p\u0159i p\u016fsoben\u00ed trhac\u00edch sil.<\/p>\n\n\n\n<p>Toto m\u011b\u0159en\u00ed poskytuje informace o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Trvanlivost materi\u00e1lu v re\u00e1ln\u00fdch aplikac\u00edch<\/li>\n\n\n\n<li>Odolnost proti \u0161\u00ed\u0159en\u00ed trhlin<\/li>\n\n\n\n<li>Konzistence kvality mezi jednotliv\u00fdmi \u0161ar\u017eemi<\/li>\n\n\n\n<li>Vliv slo\u017een\u00ed, vytvrzov\u00e1n\u00ed a zm\u011bn receptury<\/li>\n<\/ul>\n\n\n\n<p>P\u0159esto\u017ee v\u00fdsledky test\u016f nejsou p\u0159\u00edmo ekvivalentn\u00ed v\u00fdkonnosti v ter\u00e9nu, tvo\u0159\u00ed d\u016fle\u017eit\u00fd z\u00e1klad pro srovn\u00e1vac\u00ed hodnocen\u00ed a zaji\u0161t\u011bn\u00ed kvality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zkou\u0161ka pevnosti elastomer\u016f v tahu<\/h2>\n\n\n\n<p>Na str\u00e1nk\u00e1ch <strong>zkou\u0161ka pevnosti elastomer\u016f v roztr\u017een\u00ed<\/strong> popsan\u00e1 v norm\u011b ASTM D624 zahrnuje nep\u0159etr\u017eit\u00e9 nam\u00e1h\u00e1n\u00ed p\u0159ipraven\u00e9ho vzorku na roztr\u017een\u00ed, dokud nedojde k \u00fapln\u00e9mu roztr\u017een\u00ed. Tahov\u00fd zku\u0161ebn\u00ed stroj p\u016fsob\u00ed silou s \u0159\u00edzenou rychlost\u00ed. Zaznamenan\u00e1 maxim\u00e1ln\u00ed s\u00edla vyd\u011blen\u00e1 tlou\u0161\u0165kou vzorku p\u0159edstavuje odolnost proti roztr\u017een\u00ed.<\/p>\n\n\n\n<p>Mezi kl\u00ed\u010dov\u00e9 faktory ovliv\u0148uj\u00edc\u00ed pevnost slz pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rozlo\u017een\u00ed nap\u011bt\u00ed<\/li>\n\n\n\n<li>Geometrie vzorku<\/li>\n\n\n\n<li>Rychlost tahu<\/li>\n\n\n\n<li>Mechanick\u00e1 anizotropie<\/li>\n\n\n\n<li>Tlou\u0161\u0165ka materi\u00e1lu<\/li>\n<\/ul>\n\n\n\n<p>Proto\u017ee ka\u017ed\u00e1 konstrukce vzorku m\u011b\u0159\u00ed jin\u00e9 chov\u00e1n\u00ed p\u0159i trh\u00e1n\u00ed, norma ASTM D624 jasn\u011b stanov\u00ed, \u017ee <strong>v\u00fdsledky nelze korelovat mezi jednotliv\u00fdmi typy<\/strong>. Pro p\u0159esn\u00e9 vyhodnocen\u00ed je z\u00e1sadn\u00ed zvolit spr\u00e1vnou geometrii.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zkou\u0161ka pevnosti v tahu: ASTM D624 Typy vzork\u016f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. ASTM D624 typ C<\/h3>\n\n\n\n<p><strong>ASTM D624 typ C<\/strong> pou\u017e\u00edv\u00e1 vzorek pod \u00fahlem 90\u00b0 bez p\u0159edem vy\u0159\u00edznut\u00e9ho z\u00e1\u0159ezu. Tento typ m\u011b\u0159\u00ed p\u0159edev\u0161\u00edm <strong>pevnost p\u0159i iniciaci trh\u00e1n\u00ed<\/strong>, se zam\u011b\u0159en\u00edm na chov\u00e1n\u00ed materi\u00e1lu v m\u00edst\u011b koncentrace nap\u011bt\u00ed. Pokud trh\u00e1n\u00ed neza\u010dne na vrcholu, mohou v\u00fdsledky odr\u00e1\u017eet sp\u00ed\u0161e chov\u00e1n\u00ed v tahu ne\u017e v trh\u00e1n\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. ASTM D624 typ B<\/h3>\n\n\n\n<p><strong>ASTM D624 typ B<\/strong> pou\u017e\u00edv\u00e1 p\u016flm\u011bs\u00edcovit\u00fd, na\u0159\u00edznut\u00fd vzorek s \u00fachytn\u00fdmi v\u00fdstupky. Poskytuje spolehliv\u00e9 m\u011b\u0159en\u00ed <strong>\u0161\u00ed\u0159en\u00ed slz<\/strong>, tak\u017ee se up\u0159ednost\u0148uje, pokud to velikost vzorku umo\u017e\u0148uje.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. ASTM D624 typ A<\/h3>\n\n\n\n<p><strong>ASTM D624 typ A<\/strong> rovn\u011b\u017e hodnot\u00ed \u0161\u00ed\u0159en\u00ed trhlin, ale pou\u017e\u00edv\u00e1 se, pokud jsou k dispozici men\u0161\u00ed vzorky plech\u016f. Jeho geometrie nab\u00edz\u00ed kompaktn\u00ed alternativu pro omezen\u00e9 materi\u00e1ly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. ASTM D624 typ T<\/h3>\n\n\n\n<p><strong>ASTM D624 typ T<\/strong> navazuje na klasick\u00fd design roztr\u017een\u00fdch kalhot. Ob\u011b nohavice jsou od sebe odd\u011bleny, zat\u00edmco stroj zaznamen\u00e1v\u00e1 kontinu\u00e1ln\u00ed s\u00edlu. Tato metoda jasn\u011b odr\u00e1\u017e\u00ed chov\u00e1n\u00ed p\u0159i \u0161\u00ed\u0159en\u00ed po d\u00e9lce nohavice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. ASTM D624 typ CP<\/h3>\n\n\n\n<p>Na str\u00e1nk\u00e1ch <strong>ASTM D624 Typ CP<\/strong> vzorek je zdokonalenou verz\u00ed konstrukce roztr\u017een\u00ed kalhot s omezenou dr\u00e1hou roztr\u017een\u00ed a siln\u011bj\u0161\u00edmi nohavicemi. To zabra\u0148uje odchylk\u00e1m a sni\u017euje \u00fa\u010dinky prodlou\u017een\u00ed, co\u017e poskytuje stabiln\u011bj\u0161\u00ed \u00fadaje o \u0161\u00ed\u0159en\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Metoda a postup zkou\u0161ky pevnosti v tahu<\/h2>\n\n\n\n<p>P\u0159esn\u00e9 <strong>zkou\u0161ka pevnosti v tahu<\/strong> podle normy ASTM D624 vy\u017eaduje spr\u00e1vnou p\u0159\u00edpravu vzork\u016f a p\u0159esnou kontrolu p\u0159\u00edstroj\u016f. Typick\u00e9 kroky zahrnuj\u00ed:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Kondicionov\u00e1n\u00ed a p\u0159\u00edprava vzork\u016f podle geometrick\u00fdch specifikac\u00ed.<\/li>\n\n\n\n<li>Upevn\u011bn\u00ed vzorku pro zaji\u0161t\u011bn\u00ed rovnom\u011brn\u00e9ho nam\u00e1h\u00e1n\u00ed a bezpe\u010dn\u00e9ho uchopen\u00ed.<\/li>\n\n\n\n<li>Provoz stroje s p\u0159edepsan\u00fdmi ot\u00e1\u010dkami k\u0159\u00ed\u017eov\u00e9 hlavy:\n<ul class=\"wp-block-list\">\n<li>500 \u00b1 50 mm\/min pro typ A, B, C<\/li>\n\n\n\n<li>50 \u00b1 5 mm\/min pro typ T, CP<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Z\u00e1znam maxim\u00e1ln\u00ed trhac\u00ed s\u00edly nebo pr\u016fb\u011b\u017en\u00e9 k\u0159ivky s\u00edly.<\/li>\n\n\n\n<li>V\u00fdpo\u010det pevnosti v tahu na jednotku tlou\u0161\u0165ky.<\/li>\n<\/ol>\n\n\n\n<p>Stabiln\u00ed, vysoce p\u0159esn\u00fd tahov\u00fd tester je nezbytn\u00fd pro zaji\u0161t\u011bn\u00ed opakovatelnosti a minimalizaci prokluzu nebo nesouososti.<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[2],"class_list":["post-634","standard","type-standard","status-publish","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.teartester.com\/cs\/wp-json\/wp\/v2\/standard\/634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.teartester.com\/cs\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.teartester.com\/cs\/wp-json\/wp\/v2\/types\/standard"}],"wp:attachment":[{"href":"https:\/\/www.teartester.com\/cs\/wp-json\/wp\/v2\/media?parent=634"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.teartester.com\/cs\/wp-json\/wp\/v2\/standard-category?post=634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}