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All Journal International Journal of Science and Engineering (IJSE) Jurnal Teknik Mesin AJAD : Jurnal Pengabdian kepada Masyarakat kawanad Design Journal
M. Nizar Machmud
Universitas Syiah Kuala
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

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FEM Simulation of Polycarbonate Alloys-made Sheet under a Drop Weight Impact Test: Deformation and Failure Performances M. Nizar Machmud; Zahrul Fuadi
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17.41 KB)

Abstract

This paper presents a study of deformation and failure performances of a plastic sheet made of polymer alloys subjected to drop weight impact of a cylindrical mass with hemispherical tip at a certain velocity by using dynamic explicit finite element code of MSC. Dytran. An available material model in the finite element system, called piecewise linear plasticity, was applied in the simulation for describing the large strain, non-linear behavior of the polymeric materials. Maximum plastic strain failure criterion was used to simulate the impact failure. In the simulation, the mass served as a rigid surface strikes perpendicularly the potential impact region of an arbitrary designed- plastic sheet that was considered in the form of a fully-clamped circular thin plate. Contact between the mass and plate was applied and friction coefficient m between the mass and plate was assumed to be a constant value of 0.3. In order to study effect of the assumed friction coefficient value, additional simulations of the impact test have been performed using m = 0. Some limitations in the use of the material model were illustrated through the analysis of results from two types of tough polycarbonate (PC) alloys: PC/ABS and PC/PBT blends. Impact force-displacement relationships of each alloy were then compared to the test result.
Pengaruh Waktu Tahan pada Perlakuan Panas Pasca Pengelasan terhadap Kekerasan dan Kuat Tarik Baja Karbon ASTM A106 Grade B M. Nizar Machmud; Defri Maulana; - Husaini
Jurnal Teknik Mesin Unsyiah Vol 1, No 3 (2013)
Publisher : Jurnal Teknik Mesin Unsyiah

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Experimental investigations to study significant effects of employing a post weld heat treatment (PWHT) technique on mechanical properties of the welded carbon steel have been performed. This paper presents a study on hardness and tensile strength characteristics of a carbon steel A106 grade B welded using shielded metal arc welding (SMAW) method with employing normalizing procedures. With the PWHT technique, heating temperature of the steel, that was set up to 850°C, was then maintained for these following set of holding times: 10, 20 and 30 minutes before cooling. Heating and cooling rates of the carbon steel were also slowly maintained. Investigation results under tension showed that the tensile strength of the carbon steel decreased with increase of the holding time. The best tensile strength was achieved by the carbon steel treated with a holding time for 20 min. Toughness of the carbon steel under tension is also discussed in order to correlate the influence of employing the PWHT technique on their fracture modes. Investigation with Vickers hardness test showed that the Vickers hardness on weld metal, weld line, heat-affected zone (HAZ) and base metal of the welded carbon steel, respectively, decreased and tended to be equivalent with the increase of the holding time.
Pengaruh Penghambatan Kebeningan Kaca Terhadap Kemampuan Transfer Intensitas Cahaya Pada Kaca Muhammad Sayuthi; Ahmad Syuhada; M. Nizar Machmud
Jurnal Teknik Mesin Unsyiah Vol 2, No 2 (2014)
Publisher : Jurnal Teknik Mesin Unsyiah

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Abstract

The sun is the primary source of energy on the earth, but its light sometimes cause thermal discomfort for humans. The thermal engineering started one in the automotive sector in particular car is to install the air conditioner to lower the temperature of the cabin and use the tranfer window film to block sun light intensity. Testing the proper use of window film to determine the effect of inhibition of the ability to transfer the glass clarity of light intensity on the glass needs to be done to determine what percentage inhibition that has the intensity and the lower the cabin temperature, so the thermal comfort is achieved faster. From the results of the testing were conditioned using Solar ray Collector © PHYWE Systeme GmbH CO.KG. Inhibition obtained with 40% glass has an intensity of 39% and a temperature of 63.20 C, the glass has an intensity of 60% inhibition of 21% and a temperature of 61.90 C, the glass has an intensity of 80% inhibition of 8% and a temperature of 63.80 C. So the use of glass with 60% inhibition is best to accelerate the thermal comfort is achieved.
Complex Eigenvalue Analysis of A Motorcycle Disc Brake Squeal Zahrul Fuadi; Muhammad Nizar Machmud
Jurnal Teknik Mesin Unsyiah Vol 1, No 1 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

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This paper discusses the phenomenon of brake squeal of a disc brake system used at motorcycle with a capacity of 125 cc. The occurrence of disc brake squeal is associated with the dynamic instability of the system with the influence coefficient of friction. The dynamic instability of the system is predicted using finite element complex eigenvalue analysis. The analysis predicted three unstable modes in the frequency range below 5 kHz. The unstable modes occurred at the frequency of 1250 Hz, 1920 Hz, and 2306 Hz. The occurrence of unstable mode is indicated by the presence of positive real part of the corresponding complex eigenvalue. Unstable mode is shown by the occurrence of coupled vibration between eigenvectors of disc and brake pads vibrating at similar frequency which consists of diametral mode of disc and bending modes of pads. The analysis also showed that the unstable condition could occur at a value of coefficient of friction as low as 0.2.
Alternative Fiber Sources from Gracilaria Sp and Eucheuma Cottonii for Papermaking M. Nizar Machmud; Fauzan Fadi; Zahrul Fuadi; Coco Kokarkin
International Journal of Science and Engineering Vol 6, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (833.528 KB) | DOI: 10.12777/ijse.6.1.1-10

Abstract

Private sectors have invested in the technology to grow some Gelidialian red algae families and also tried to convert the algae to pulp and paper over the last few years in order to replace raw materials from wood. Several modern systems with their all complexities which are similar to the wood pulp-based papermaking technology have been offered to overcome any recent issues settle in the converting process. Chemical bleaching agents have even been still a standard treatment that must be established for properly converting the algae pulp to a sheet of paper. In this present work, the two genus of red algae, called Gracilaria and Eucheuma, were simply processed to make pulps without use of any bleaching chemical agents. The potential use of pulps made of the red algae as raw materials for papermaking was mechanically studied by testing the sheets made of the red algae through a tensile test at a room temperature under 20 mm/min according to ASTM D 828-97 (2002). Tensile properties of the proposed algae-based paper sheets obtained under the constant rate are discussed. Tensile properties of the selected wood-based paper sheets obtained under the same condition are also presented in this paper. The results showed that pulps made of the red algae would be the alternative to those of the wood and other natural fibers as raw materials for papermaking. Doi: 10.12777/ijse.6.1.1-10 [How to cite this article: Arham, N.A., Mohamad, N.A.N., Jai, J., Krishnan, J., Noorsuhana Mohd Yusof, N.M. (2013). Application of Response Surface Methodology in Extraction of Bioactive Component from Palm Leaves (Elaeis guineensis). International Journal of Science and Engineering, 6(1),1-10. Doi: 10.12777/ijse.6.1.1-10
Characteristics of Red Algae Bioplastics/Latex Blends under Tension M. Nizar Machmud; Reza Fahmi; Rohana Abdullah; Coco Kokarkin
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.877 KB) | DOI: 10.12777/ijse.5.2.81-88

Abstract

Cassava, corn, sago and the other food crops have been commonly used as raw materials to produce green plastics. However, plastics produced from such crops cannot be tailored to fit a particular requirement due to their poor water resistance and mechanical properties. Nowadays, researchers are hence looking to get alternative raw materials from the other sustainable resources to produce plastics. Their recent published studies have reported that marine red algae, that has been already widely used as a raw material for producing biofuels, is one of the potential algae crops that can be turned into plastics. In this work, Eucheuma Cottonii, that is one of the red alga crops, was used as raw material to produce plastics by using a filtration technique. Selected latex of Artocarpus altilis and Calostropis gigantea was separately then blended with bioplastics derived from the red algae, to replace use of glycerol as plasticizer. Role of the glycerol and the selected latex on physical and mechanical properties of the red algae bioplastics obtained under a tensile test performed at room temperature are discussed. Tensile strength of some starch-based plastics collected from some recent references is also presented in this paperDoi: 10.12777/ijse.5.2.81-88 [How to cite this article: Machmud, M.N., Fahmi, R.,  Abdullah, R., and Kokarkin, C.  (2013). Characteristics of Red Algae Bioplastics/Latex Blends under Tension. International Journal of Science and Engineering, 5(2),81-88. Doi: 10.12777/ijse.5.2.81-88
Perawatan Pompa Air untuk Sarana Air Bersih Mushalla Al-Muhajirin Desa Blang Krueng Kabupaten Aceh Besar Suhaeri; Mahdi Syukri; Alfisyahrin; Agus Adria; Syukriyadin; Masri Ali; Nurdin Ali; M. Nizar Machmud; Huzaim; Saiful; Ramdan Halid Siregar
AJAD : Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 1 (2023): APRIL 2023
Publisher : Lembaga Mitra Solusi Teknologi Informasi (L-MSTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59431/ajad.v3i1.148

Abstract

Community service activities are carried out to maintain water pumps in the Al Muhajirin Mushalla clean water facility in Blang Krueng Village, Aceh Besar District, to address the problem of the availability of clean water in the area. The project team carried out several stages during the week, including observation, problem identification, planning, implementation, and evaluation. Observations were made at clean water facilities to identify existing problems. The results showed that the water pump used in the clean water facility was damaged and not functioning properly. Therefore maintenance is needed to repair the water pump so that clean water facilities can function properly. After identifying the problem, the team plans to maintain the water pump by replacing damaged components and cleaning the contaminated parts. Clean water facilities in Mushalla Al Muhajirin can function properly after maintenance, and the availability of clean water in the area increases. Evaluation is carried out to determine the success of maintenance. The evaluation showed that the maintenance was successful in increasing the availability of clean water, and the local community felt that this improvement helped. In conclusion, the water pump maintenance project at Mushalla Al Muhajirin succeeded in increasing the availability of clean water. This community service project is expected to inspire and guide other communities in improving their clean water facilities.
Penerapan Teknologi Tepat Guna/Sasaran Berbasis Energi Terbarukan di Desa Alue Naga Kota Banda Aceh Masri Ali; Zainal Arif; Syahrizal; Irma Dewi; Elvy Sahnur Nasution; Masri Ibrahim; Nurdin Ali; M. Nizar Machmud; Husni
Kawanad : Jurnal Pengabdian kepada Masyarakat Vol. 1 No. 1 (2022): March
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/kjpkm.v1i1.7

Abstract

The focus of community service activities in Alue Naga Village is to provide solutions to the problem of limited electrical energy experienced by the people in Acehr. The purpose of community service is to downstream the results of the author's research on renewable energy technology for the island community. This community service method is (1) Training and technical guidance by the implementing team to partners regarding the operation and maintenance of the appropriate technology system that is applied; (2) the application of appropriate technology based on renewable energy in the form of solar street lights and wind power to increase access to electricity. Through technology transfer in this Community Service activity, it is hoped that the implementation of technology will be maintained continuously; The results of community service are the installation of the application of appropriate technology in the form of solar and wind power and increasing public knowledge about appropriate technology which is carried out through training to community youth partners in Alue Naga Village, Banda Aceh City.
Inventivitas Pengrajin Rencong Suevenir dalam Mewujudkan Gampong Wirausaha Masri Ali; M. Nizar Machmud; Iskandar; Akhyar; Husni; T. Edisah Putra; Sulaiman Thalib; Masri Ibrahim
Kawanad : Jurnal Pengabdian kepada Masyarakat Vol. 1 No. 2 (2022): October
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/kjpkm.v1i2.85

Abstract

In Aceh Besar, Suka Makmur and Lam Phueot villages, lotus root souvenir manufacturing faces several obstacles such as inadequate marketing strategies and lack of skill in the process. Therefore, this initiative seeks to provide partners with production-related solutions by integrating technology with Rencong souvenir molds. The implementation team also performs socialization and consulting related to internet marketing of products to increase market access and outreach. Program objectives were achieved using the Participatory Rural Assessment Act (PRA). From this initiative, his Mitra Pak Majid of Rencong Souvenir Crafts was able to provide capital support in the form of a bulk casting business.
Penerapan Aplikasi Administrasi Microsoft Office Pada Para Operator Pendidikan Anak Usia Dini (PAUD) di Kecamatan Syiah Kuala Kota Banda Aceh Zainuddin; Saiful; Masri; T. Edisah Putra; M. Nizar Machmud; Suhaeri; Akhyar; Suriadi; Ira Devi Sara; Nurul Malahayati
Kawanad : Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 2 (2023): October
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/kjpkm.v2i2.171

Abstract

Early childhood education (PAUD) is very important to prepare an educated generation for the nation and state, and the role of early childhood educators (PAUD) is very important in the development of students. Educators need to go beyond traditional learning by providing learning innovations that utilize information technology, including the ability to master the latest information technology. The focus of the Community Service Program (PKM) is to improve   the quality of human resources (HR) of PAUD organizers in Syiah Kuala District, Banda Aceh Province in the field of information technology, so that they are able to support the management of learning and educational activities. In improving the quality of kindergarten teaching staff in the field of information technology is related to supervision management and making daily learning implementation plans (RPPH). With a system that allows teachers to quickly resolve administrative problems, it is hoped that they can use their time to further develop their knowledge and skills regarding PAUD administrative problems.
Co-Authors - Husaini Agus Adria Ahmad Syuhada Akhyar Alfisyahrin, Alfisyahrin Coco Kokarkin Coco Kokarkin Defri Maulana Dewi, Irma Elvy Sahnur Nasution Fauzan Fadi Husni Huzaim Huzaim Ira Devi Sara Iskandar Mahdi Syukri Masri Masri ALI Masri Ibrahim Muhammad Sayuthi Nurdin Ali Nurul Malahayati Ramdan Halid Siregar Reza Fahmi Rohana Abdullah Saiful Suhaeri Sulaiman Thalib Suriadi Syahrizal Syukriyadin T. Edisah Putra Zahrul Fuadi Zahrul Fuadi Zahrul Fuadi Zainuddin Zulkarnain Jalil