{"id":18731,"date":"2022-09-07T08:44:16","date_gmt":"2022-09-07T08:44:16","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=18731"},"modified":"2022-09-07T08:55:55","modified_gmt":"2022-09-07T08:55:55","slug":"compression-test-of-cff-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/compression-test-of-cff-filter\/","title":{"rendered":"Essai de compression d'un filtre CFF"},"content":{"rendered":"

Essai de compression d'un filtre CFF<\/a>.<\/p>\n

2.24 Essai de r\u00e9sistance \u00e0 la compression L'appareil utilis\u00e9 pour cet essai est une machine d'essai universelle \u00e9lectronique de la s\u00e9rie CMT, command\u00e9e par ordinateur.<\/p>\n

L'\u00e9chantillon se pr\u00e9sente sous la forme d'un cylindre d'un diam\u00e8tre de 20 \u00b1 0,5 mm et d'une hauteur de 20 \u00b1 1 mm. Cinq \u00e9chantillons par groupe. Les \u00e9chantillons d'essai sont fabriqu\u00e9s selon le m\u00eame proc\u00e9d\u00e9 que celui utilis\u00e9 pour la production du produit. La surface de compression de l'\u00e9chantillon est rectifi\u00e9e \u00e0 plat, et les deux surfaces de compression sont maintenues parall\u00e8les l'une \u00e0 l'autre.<\/p>\n

\"filtre
filtre cff<\/figcaption><\/figure>\n

(1) Mesurer le diam\u00e8tre des surfaces de pression sup\u00e9rieure et inf\u00e9rieure de l'\u00e9chantillon, avec une pr\u00e9cision de 0,01 cm.<\/p>\n

(2) Placer l'\u00e9chantillon au centre du plateau inf\u00e9rieur de la machine d'essai, puis appliquer une pression de mani\u00e8re uniforme \u00e0 une vitesse de 20 \u00b1 5 kg\/cm\u00b2 par seconde, jusqu'\u00e0 ce que l'aiguille du manom\u00e8tre s'inverse ; l'essai doit alors \u00eatre imm\u00e9diatement interrompu.<\/p>\n

2 o\u00f9 : Rc \u2014 la r\u00e9sistance \u00e0 la compression de la Essai de compression d'un filtre CFF<\/a>, la surface de compression de l'\u00e9prouvette (mm\u00b2) ; d\u2082, le diam\u00e8tre des surfaces de compression sup\u00e9rieure et inf\u00e9rieure de l'\u00e9prouvette (mm) ; P \u2014 la pression \u00e0 laquelle l'\u00e9prouvette se rompt (N)<\/p>\n

22.5 Essai de r\u00e9sistance \u00e0 la flexion<\/p>\n

L'instrument d'essai est une machine d'essai universelle \u00e9lectronique command\u00e9e par micro-ordinateur de la s\u00e9rie CMT. Les caract\u00e9ristiques des \u00e9prouvettes sont les suivantes : 10 \u00b1 1 mm de hauteur, 20 \u00b1 1 mm de largeur et 120 \u00b1 2 mm de longueur. 5 \u00e9prouvettes par groupe. Elles sont fabriqu\u00e9es selon le m\u00eame proc\u00e9d\u00e9 que celui utilis\u00e9 pour la production du produit fini. La surface de l'\u00e9chantillon est meul\u00e9e \u00e0 plat.<\/p>\n

(1) Avant l'essai, \u00e9liminer les particules d'impuret\u00e9s pr\u00e9sentes \u00e0 la surface de l'\u00e9chantillon<\/p>\n

(2) Placer l'\u00e9chantillon dans un four, le s\u00e9cher \u00e0 110 \u00b1 5 \u00b0C pendant 2 heures, puis le placer dans un dessiccateur pour le laisser refroidir \u00e0 temp\u00e9rature ambiante.<\/p>\n

(3) R\u00e9gler la distance entre les supports \u00e0 50 mm, placer l'\u00e9chantillon sur le support, appliquer une charge \u00e0 une vitesse de 2 \u00b1 0,5 N\/s jusqu'\u00e0 ce que l'\u00e9chantillon se rompe, puis relever la valeur de la charge au moment de la rupture.<\/p>\n

(4) Mesurer l'\u00e9paisseur et la largeur de la partie cass\u00e9e de l'\u00e9chantillon, avec une pr\u00e9cision de 0,01 mm ; la formule de calcul est la suivante :<\/p>\n

RF = 3PL\/2BN2<\/p>\n

Rr \u2014 R\u00e9sistance \u00e0 la flexion de filtre en c\u00e9ramique poreuse<\/a> (MPa) P \u2014 Charge de rupture de l'\u00e9prouvette (N) L \u2014 Distance entre les bords d'appui (mm) b \u2014 Largeur de l'\u00e9prouvette au niveau de la rupture (mm) h \u2014 \u00c9paisseur de l'\u00e9prouvette au niveau de la rupture (mm)<\/p>","protected":false},"excerpt":{"rendered":"

Compression test of cff filter. 2.24 Compressive strength testing The testing instrument is CMT series computer-controlled electronic universal material testing machine. The sample size is…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[487],"class_list":["post-18731","post","type-post","status-publish","format-standard","hentry","category-blog","tag-cff-filter"],"yoast_head":"\nCompression test of cff filter, Ceramic Foam Filter, porous ceramic filter<\/title>\n<meta name=\"description\" content=\"Compression test of cff filter, The testing instrument is CMT series computer-controlled electronic universal material testing machine.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/fr\/compression-test-of-cff-filter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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