{"id":9560,"date":"2021-10-17T15:54:43","date_gmt":"2021-10-17T13:54:43","guid":{"rendered":"https:\/\/www.presticebdt.com\/?p=9560"},"modified":"2021-10-17T15:54:44","modified_gmt":"2021-10-17T13:54:44","slug":"screw-bolt-stress-tool-calculator-structural-joint-analysis","status":"publish","type":"post","link":"https:\/\/www.presticebdt.com\/el\/screw-bolt-stress-tool-calculator-structural-joint-analysis\/","title":{"rendered":"\u0395\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03bf\u03cd \u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u03b2\u03b9\u03b4\u03ce\u03bd + \u03bc\u03c0\u03bf\u03c5\u03bb\u03bf\u03bd\u03b9\u03ce\u03bd | \u0391\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03b4\u03bf\u03bc\u03b9\u03ba\u03ce\u03bd \u03b1\u03c1\u03b8\u03c1\u03ce\u03c3\u03b5\u03c9\u03bd"},"content":{"rendered":"

\u0395\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03bf\u03cd \u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u03b2\u03b9\u03b4\u03ce\u03bd + \u03bc\u03c0\u03bf\u03c5\u03bb\u03bf\u03bd\u03b9\u03ce\u03bd | \u0391\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03b4\u03bf\u03bc\u03b9\u03ba\u03ce\u03bd \u03b1\u03c1\u03b8\u03c1\u03ce\u03c3\u03b5\u03c9\u03bd<\/h1>\n<\/div><\/section><\/div>\n

\u0397 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ac \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b2\u03b9\u03b4\u03ce\u03bd \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c5\u03bb\u03bf\u03bd\u03b9\u03ce\u03bd \u03b5\u03be\u03b7\u03b3\u03b5\u03af\u03c4\u03b1\u03b9.<\/h3>\n

\u039c\u03b9\u03b1 \u03b2\u03af\u03b4\u03b1 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03b5\u03b3\u03ba\u03b1\u03b8\u03af\u03c3\u03c4\u03b1\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03bf\u03c0\u03ae \u03bc\u03b5 \u03c3\u03c0\u03b5\u03af\u03c1\u03c9\u03bc\u03b1<\/strong>, unless it is a self-tapping screw which creates its own thread. Screws don\u2019t need nuts, as they become secure by being tightened into the hole with a screwdriver or driver bit which fits into the drive recess.<\/p>\n

\n
\n
\n

\u039f\u03b9 \u03ba\u03bf\u03c7\u03bb\u03af\u03b5\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bd \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03c4\u03b5\u03af \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf \u03c0\u03b1\u03be\u03b9\u03bc\u03ac\u03b4\u03b9.<\/strong> \u0397 \u03bf\u03c0\u03ae \u03b3\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03bc\u03c0\u03bf\u03c5\u03bb\u03cc\u03bd\u03b9 \u03b4\u03b5\u03bd \u03b1\u03bd\u03bf\u03af\u03b3\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03b8\u03ce\u03c2 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03bb\u03cc\u03bd\u03b9 \u03c9\u03b8\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b5\u03c1\u03b5\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03b9 \u03c3\u03c6\u03af\u03b3\u03b3\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03ad\u03bd\u03b1 \u03c0\u03b1\u03be\u03b9\u03bc\u03ac\u03b4\u03b9 \u03c3\u03c4\u03bf \u03c0\u03af\u03c3\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c0\u03bf\u03c5 \u03c3\u03c4\u03b5\u03c1\u03b5\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9. \u0388\u03c4\u03c3\u03b9, \u03ad\u03bd\u03b1\u03c2 \u03ba\u03bf\u03c7\u03bb\u03af\u03b1\u03c2 \u03b8\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b1\u03ba\u03c1\u03cd\u03c4\u03b5\u03c1\u03bf\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c0\u03bb\u03ac\u03c4\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c3\u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03b5\u03be\u03ad\u03c7\u03b5\u03b9 \u03c3\u03c4\u03b7\u03bd \u03ac\u03bb\u03bb\u03b7 \u03c0\u03bb\u03b5\u03c5\u03c1\u03ac \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b2\u03b9\u03b4\u03c9\u03b8\u03b5\u03af \u03c3\u03c4\u03bf \u03c0\u03b1\u03be\u03b9\u03bc\u03ac\u03b4\u03b9.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\u0395\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03b5\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5 \u03c4\u03ac\u03c3\u03b7\u03c2 \u03b2\u03af\u03b4\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c5\u03bb\u03bf\u03bd\u03b9\u03bf\u03cd \u03c5\u03c0\u03cc \u03c0\u03c1\u03bf\u03c6\u03cc\u03c1\u03c4\u03b9\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf.<\/h3>\n

\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03b1\u03be\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03c0\u03c1\u03bf\u03c6\u03cc\u03c1\u03c4\u03b9\u03c3\u03b7\u03c2 (\u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03c4\u03b7\u03bd \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03af\u03c3\u03b5\u03c4\u03b5 \u03bc\u03b5 \u03c4\u03bf \u03b4\u03c9\u03c1\u03b5\u03ac\u03bd \u03b1\u03c1\u03b9\u03b8\u03bc\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03ae \u03c0\u03c1\u03bf\u03c6\u03cc\u03c1\u03c4\u03b9\u03c3\u03b7\u03c2 \u03b5\u03b4\u03ce<\/a>), \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03bd \u03bd\u03b1 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c4\u03ac\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u03b2\u03af\u03b4\u03b1\u03c2\/\u03b2\u03af\u03b4\u03b1\u03c2 \u03c3\u03b1\u03c2 \u03c5\u03c0\u03cc \u03b5\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03b5\u03b9 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03b5\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5 \u03c4\u03ac\u03c3\u03b7\u03c2 \u03b2\u03af\u03b4\u03b1\u03c2\/\u03b2\u03af\u03b4\u03b1\u03c2, \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c3\u03c4\u03b5 \u03bc\u03cc\u03bd\u03bf \u03c4\u03b1 \u03b5\u03be\u03ae\u03c2:<\/p>\n

    \n
  • \u0395\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1<\/strong> (\u03b1\u03be\u03bf\u03bd\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bc\u03b7\u03c4\u03b9\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1)<\/li>\n
  • \u0391\u03bd\u03c4\u03bf\u03c7\u03ae \u03c3\u03b5 \u03b4\u03b9\u03b1\u03c1\u03c1\u03bf\u03ae<\/strong> \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c4\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c5\u03bb\u03bf\u03bd\u03b9\u03bf\u03cd\/\u03b2\u03af\u03b4\u03b1\u03c2. \u039c\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b2\u03c1\u03b5\u03af\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03c6\u03cd\u03bb\u03bb\u03bf \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03bf\u03c7\u03ae \u03b4\u03b9\u03b1\u03c1\u03c1\u03bf\u03ae\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03c0\u03b9\u03bf \u03c3\u03c5\u03bd\u03b7\u03b8\u03b9\u03c3\u03bc\u03ad\u03bd\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac \u03b5\u03b4\u03ce<\/a>.<\/li>\n
  • \u039f\u03bd\u03bf\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03ae \u03b4\u03b9\u03ac\u03bc\u03b5\u03c4\u03c1\u03bf\u03c2<\/strong> \u03c4\u03b7\u03c2 \u03b1\u03bd\u03b8\u03b5\u03ba\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03b7\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03bf\u03c7\u03bb\u03af\u03b1\/\u03b2\u03af\u03b4\u03b1\u03c2<\/li>\n
  • \u03a0\u03b1\u03c1\u03ac\u03b3\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b4\u03b9\u03ac\u03c4\u03bc\u03b7\u03c3\u03b7\u03c2<\/strong> \u03c4\u03b7\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae\u03c2 (1,33 \u03b3\u03b9\u03b1 \u03ba\u03c5\u03ba\u03bb\u03b9\u03ba\u03ad\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ad\u03c2).<\/li>\n<\/ul>\n

    \u03a4\u03b1 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03c4\u03cc\u03c3\u03bf \u03bc\u03b5 \u039c\u03b5\u03c4\u03c1\u03b9\u03ba\u03cc\/\u0394\u03b9\u03b5\u03b8\u03bd\u03ad\u03c2<\/strong> \u039c\u03bf\u03bd\u03ac\u03b4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u0391\u03c5\u03c4\u03bf\u03ba\u03c1\u03b1\u03c4\u03bf\u03c1\u03b9\u03ba\u03cc<\/strong> Units. If a safety factor < 1.5 is revealed, the joint connection may be unsafe. In case the output on the compressive force is negative, the joint connection is likely to open under the external axial load (in general because external axial load > preload force).<\/p>\n<\/div><\/section>\n

    \u0395\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03b5\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5 \u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u03b3\u03b9\u03b1 \u03b2\u03af\u03b4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c5\u03bb\u03cc\u03bd\u03b9\u03b1 \u03c5\u03c0\u03cc \u03b5\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1<\/h3>\n

    \"\u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf<\/a><\/p>\n<\/div><\/section><\/div>\n