Elvis Adril
Politeknik Negeri Padang

Published : 5 Documents
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Analisa Kualitas Permukaan Benda Kerja Hasil Proses Pemesinan Milling Rosa, Yazmendra; Adril, Elvis; Effiandi, Nota
JURNAL R & B Vol 2, No 2 (2002)
Publisher : JURNAL R & B

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Abstract

Surface finish of machining product has many varieties is really depend on several factors which are involve during the process. Surface finish will affect the market ability of product of aiming the product should fulfil the minimum surface finish Requirement. This research intends to observe the surface finish of product proceeded by milling process. So the optimal process condition could be achieved in term to making the simplest way in planning. The result shows the relationship between spindle rotation cutting speeds for producing and the good surface finish of which is being machined by milling process Furthermore this result could provide accurate data for determination and setting of machining process.
Analisa Kegagalan Sambungan Las Pada Pipa Aunstenit Stainless Steel Adril, Elvis; Badaruddin, M; Zulhendri, Zulhendri
JURNAL R & B Vol 2, No 1 (2002)
Publisher : JURNAL R & B

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Austenit stainless steel pipe which is connected through welding process is easily broken. It is manly due to the crack which is located in HAZ (head effected zone). The changing in micro structure creates that crack sin re there are a lot of martensit pieces. This layer includes cause of residual stress that can cause micro crack. Another cause of this crack is corrosion. This SCC is caused by the residual sterss on the material and it occurs in corrosion environment. These to causes will lead failure in construction. This failure will occur if the value of resistance intensity factor ( k1 > k 1c) or the legth of allowed crack.
Pengaruh Penambahan Mangan Terhadap Sifat Mekanik Paduan Aluminium A7075 Adril, Elvis; Zulfikar, Zulfikar; Mulyadi, Sri; Firmawati, Nini
POLI REKAYASA Vol 6, No 1 (2010)
Publisher : POLI REKAYASA

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Abstract

The research about Mn element which is added into alloy A7075 (0,5%Wt; 1,0%Wt; 1,5%Wt and 2,0%Wt) already done. The tests are conducted including hardness test, tensile test and micro structural test. It can be indicated that the change hardness, tensile and micro structural effect Mn. The optimum Mn content are 1,0%Wt by hardness number 196,43 kg/mm2, but by effect Mn can be decrease of tensile number aluminium alloy A7075.
PEMBANGKIT LISTRIK TENAGA GELOMBANG LAUT SISTIM EMPAT BANDUL Zamri, Aidil; Mura, Yusri; Asmed, Asmed; Adril, Elvis
Prosiding Semnastek PROSIDING SEMNASTEK 2015
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Pembangkit Listrik Tenaga Gelombang Laut -Sistem Bandulan (PLTGL-SB) yang rancang-bangunnya berbentuk ponton di tempatkan mengapung di atas permukaan air laut, dan PLTGL-SB tersebut akan mengikuti gerak/arus gelombang sesuai dengan frekwensi gelombang laut, sehingga menyebabkan posisi PLTGL-SB selalu bergerak terombang ambing sesuai dengan alur gelombang. Karena gerakan terombang ambing ponton yang terus-menerus tersebut menyebabkan ayunan bandul yang akan dirubah jadi putaran generator dalam hal ini ada empat bandul, sehingga PLTGL-SB mengeluarkan Energi/Daya Listrik. Gerakan bandul yang bergoyang dirobah dengan menggunakan sistem trasmisi menjadi putaran yang dapat memutar dinamo/generator, dan generator yang digunakan adalah jenis putaran rendah 3 Phase AC dengan daya 500 Watt pada putaran 1400 rpm.
PEMBANGKIT LISTRIK TENAGA GELOMBANG LAUT SISTIM EMPAT BANDUL Zamri, Aidil; Yusri, Yusri; Asmed, Asmed; Adril, Elvis
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Pembangkit  Listrik  Tenaga  Gelombang  Laut -Sistem  Bandulan  (PLTGL-SB)  yang  rancangbangunnya berbentuk ponton di tempatkan mengapung di atas permukaan air laut, dan PLTGL-SBtersebut akan mengikuti gerak/arus gelombang sesuai dengan frekwensi gelombang laut, sehinggamenyebabkan posisi PLTGL-SB selalu bergerak terombang ambing sesuai dengan alur gelombang.Karena  gerakan  terombang  ambing ponton yang  terus-menerus  tersebut menyebabkan  ayunanbandul yang akan dirubah jadi putaran generator dalam hal ini ada empat bandul, sehingga PLTGLSB  mengeluarkan  Energi/Daya  Listrik.Dan  menurut perhitungan,  untuk  panjang  pantai + 1km,terdapat  Energi  Potensial  Gelombang  Laut +10MW,  dengan  biaya  investasinya+ Rp35.000.000/kW, dan dapat menerangi + 40.000 rumah-tangga sederhana.