PERANCANGAN MESIN UJI LELAH BAJA POROS DENGAN PEMBEBANAN PUNTIR DINAMIS
DOI:
https://doi.org/10.22441/jtm.v6i4.2088Abstract
Kegagalan lelah pada suatu komponen dalam struktur mekanik akibat beban dinamis menjadi dominan ketika dalam pengoperasiannya tidak memperhatikan daerah pembebanan. Dalam sistem pengujian lelah dengan beban puntir dinamis, kekuatan lelah material dipengaruhi oleh faktor konsentrasi tegangan, kondisi permukaan, dimensi material dan temperatur pengoperasian. Kondisi kegagalan tersebut mendorong penulis melakukan penelitian dengan terlebih dahulu melakukan perancangan alat untuk menguji karakteristik lelah spesimen poros yang dikenai beban putar dinamis. Perancangan dilakukan meliputi konstruksi mesin uji, motor penggerak 1450 Rpm dengan daya ¼ Hp, kopling penghubung, bantalan duduk, control on-off, counter hour, desain specimen standar ASTM E466 dan variasi pembebanan maksimum 10 Kg. Dari hasil perancangan ini dilanjutkan dengan uji coba pengujian specimen baja poros dengan variasi beban putar dinamis dengan putaran kostan.
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