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All Journal International Journal of Advances in Applied Sciences Transmisi Rekayasa Mesin Journal of Engineering and Management in Industrial System Jurnal Inovasi Teknologi Pendidikan Bulletin of Chemical Reaction Engineering & Catalysis Journal of Mechanical Engineering Science and Technology Civil Engineering Dimension Jurnal Karinov Jurnal Teknik Mesin dan Pembelajaran Jurnal Komunitas: Jurnal Pengabidian Kepada Masyarakat Jurnal Pengabdian, Pendidikan dan Teknologi Teknomekanik International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Abdimas Prakasa Dakara Bulletin of Chemical Reaction Engineering & Catalysis Vokasi UNESA Bulletin of Engineering, Technology and Applied Science

Rr. Poppy Puspitasari

Universitas Negeri Malang

Author-ID : 2412532

Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Analysis of Mechanical Properties and Permeability of Sand Moulding by Using Eggshell in Sand Casting Wahyu Kurnianto; Poppy Puspitasari; Wahono Wahono
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 2 (2018)
Publisher : Universitas Negeri Malang

This study aimed to analyse the usage of Eggshell as mixture material of bentonite in metal casting process which used dried sand moulding. Eggshell variations in this study were 4%, 7%, 10% eggshell, and additional 3% of bentonite on each sample. This study used pre-experimental method and included to One-Shot Case Study model. The highest strength was found on the sample 3 ES 10%. Tensile strength of dried sand moulding reach up to 0.09 kg/cm2, the compressive strength of dried sand moulding reached up to 3.11 kg/cm2, and the shear strength of dried sand moulding reached up to 1.13 kg/cm2. Based on the test result indicated that permeability of sand moulding by heat treatment at 110ºC for 60 minutes at sample of 3 ES 10% was at 178.3 ml / min.

The Strength of Moulding Sand Consisting of a Mixture of Bentonite, Tapioca Flour, and Sago Flour as a New Binder Formula to Improve the Quality of Al-Si Cast Alloy Andoko Andoko; Riana Nurmalasari; M. Alfian Mizar; Retno Wulandari; Poppy Puspitasari; Avita Ayu Permanasari
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 1 (2017)
Publisher : Universitas Negeri Malang

The major factors determining the quality of sand casting products are the base sand and the composition of the sand mould and the binding material. In the foundry industry, the most commonly used binder for creating sand moulds is bentonite. However, the price of bentonite is likely to keep rising. This study aimed at discovering a new binder formula associated with the effect of binder composition i.e. bentonite, tapioca flour, and sago flour on the basis of its mechanical and physical properties. The new formula was expected to be a better binder in the production of sand moulds, resulting in high-quality casting products with minimal defects. Moreover, it is probable to be much more economical than bentonite. This research focused on testing the moulding sand composition with a number of different binders, i.e. bentonite, tapioca flour, and sago flour, each in a different proportion. The mixture of the moulding sand with each of the three binders will be tested in terms of its mechanical properties including compressive, shear, and tensile strength. Based on the test results, sago flour has the highest dry compressive strength of 28.6 N/cm2, whereas bentonite has the highest wet compressive strength, i.e. 11.83 N/cm2 and the highest wet shear strength i.e. 3.16 N/cm2. The binder with the highest dry shear strength is tapioca flour with 18.16 N/cm2. Regarding the tensile strength value, bentonite has the highest wet tensile strength of 0.85 N/cm2, while sago flour has the highest dry tensile strength of 1.73 N/cm2.

Comparison Study of Mechanical Properties of Al-Si Alloy with and without Nanoreinforce Iron Oxide (Fe2O3) Cepi Yazirin; Poppy Puspitasari; Muhamad Fatikul Arif
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 1 (2019)
Publisher : Universitas Negeri Malang

Nanoreinforce materials such as ZnO, eggshell, Al2O3, TiO2, and ZrO2 have been shown to improve the mechanical properties of Al-Si alloy. Nanomaterial Fe2O3 has many applications as catalysts reaction in electronic devices, for example, semiconductor materials, paint formulations, lithium rechargeable batteries, and is often applied in industrial fields. It is known that Fe2O3 can be synthesized through the stirring process on machine and method used will involve several steps that relatively take a long time. In this study, Al-Si alloy reinforced by using nanomaterial Fe2O3 which sintered at a temperature of 600°C for 3 hours aimed to improve mechanical and morphological properties of Al-Si alloy. The method used was stir casting, where this method was known as flexible, simple, and economic. The result of reinforcing Al-Si alloy by using nanomaterial Fe2O3 had affected on the hardness level of Al-Si alloys as evidenced by the fracture morphology that was brittle and had a light reflection

Effect of MnFe2O4 Nanoparticles to Reduce CO and HC Levels on Vehicle Exhaust Gas Emissions Poppy Puspitasari; Sukarni Sukarni; Amir Hamzah
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 1 (2018)
Publisher : Universitas Negeri Malang

The air pollution particle emitted from transportation in Indonesia Bay 2015 consist of 70.50% CO; 18.34% HC; 8.89% NOx; 0.88% SOx; 1.33%. These gases are very harmful to humans. To reduce the toxic gas effect, special treatment is needed, one of them is by applying catalyst on exhaust system. MnFe2O4 has the potential to bind the CO and HC elements contained in the exhaust gas. This study aims to investigate the effect of MnFe2O4 addition on catalityc converter towards CO gas and HC emissions of motor vehicles. Therefore, the percentage of exhaust reduction with and without applying MnFe2O4 on varied engine rotation using fuel with RON of 88, 90, 92 and 98 can be revealed. The results describe that the highest reduction precentage of CO content by applying MnFe2O4 nanoparticles as a catalyst for premium, pertalite and pertamax fuel are 34.1% (effective at low and high rotation); 31.1% (effective at all rotations); and 3.9% (effective at low rotation). On the other hand, the highest reduction percentage of HC content on premium, pertalite, pertamax and pertamax turbo fuel are 79.3% (effective in high rotation); 71.4% (effective at high rotation); 53,6% (effective in high rotation); and 2.1% (only effective at low rotation).

Development of a Ferrite-Based Electromagnetic Wave Detector Muhammad Hanish Zakariah; Poppy Puspitasari; Nur Aliza Ahmad
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 2 (2017)
Publisher : Universitas Negeri Malang

Direct detection of hydrocarbon by an active source using electromagnetic (EM) wave termed Sea Bed Logging (SBL) has shown very promising results. However, currently available electromagnetic wave technology has a number of challenges including sensitivity and lapsed time. Our initial response to this issue is to develop a ferrite-based EM wave detector for Sea Bed Logging (SBL). Ferrite bar and copper rings in various diameters were used as detector 1 (D1). For Detector 2 (D2), toroid added with copper wires in different lengths at the centre of it were used. The first experiment is to determine the inductance and resistance for both detectors by using LCR meter. We obtained the highest inductance value of 0.02530 mH at the ferrite bar when it was paired with a 15 cm diameter copper ring and 0.00526 mH for D2 using a 100 cm copper wire placed at the centre of the toroid. The highest resistivity for D1 was measured at ferrite bar paired with a 15 cm diameter copper ring and 1.099 Ω when using 20 cm length of copper wire. The second interest deals with voltage peak-to-peak (Vp-p) value for both detectors by using oscilloscope. The highest voltage value at the ferrite bar of D1 was 25.30 mV. While at D2, the highest voltage measured was 27.70 mV when using a 100 cm copper wire. The third premise is the comparison of sensitivity and lapsed time for both detectors. It was found that D1 was 61% more sensitive than D2 but had higher lapsed time than D2.

Analysis of Strength of Glass Fibre Composite Leaf Spring Using Finite Element Method Andoko Andoko; Poppy Puspitasari; Avita Ayu Permanasari
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 1 (2017)
Publisher : Universitas Negeri Malang

Leaf spring, as one of the main components of the suspension system, serves the function of absorbing road shocks and any wheel vibrations, preventing them from being transmitted directly to the vehicle body. Moreover, it can increase the tire traction as well as support the weight of the vehicle and various kinds of external forces. Various studies on the use of composite materials for leaf springs have shown that the strength of composite leaf spring is similar to steel leaf spring with the same load carrying capacity. However, the composite leaf spring has the added advantage of being more lightweight. In fact, composite materials have been preferable for many purposes not only because of its properties but also its lightweight structure and cost effectiveness. The analysis process was carried out using the finite element method by means of ANSYS software to display the output of the analysis being performed. After the output is known, the amount of voltage in conventional, mounted, and progressive spring can be determined. Based on the data analysis, we concluded that conventional straight leaf springs produced a maximum voltage of 653.13 MPa and maximum deflection of 4367.1 mm. The results of the analysis using the finite element method showed that conventional leaf springs (both straight and not) are considered as the most effective model of leaf spring in terms of the power generated.

Damage Simulation of Pre-Forming V-Neck Plates with Variations in Material Type, Time and Temperature Using the Taguchi Method Avita Ayu Permanasari; Poppy Puspitasari; Kevin Valiant Cahya; Mahfud Ihsan
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 1 (2018)
Publisher : Universitas Negeri Malang

In metal forming, damage can be caused by several factors: load on the workpiece, initial heating temperature, and temperature due to the friction between the die and the material for pre-forming. The metal forming process can be executed in 2 ways, namely by hot working and cold working. During these two types of mechanical working process, the metal undergoes plastic deformation. In hot working, the required deformation force is relatively low, and changes in mechanical properties are also insignificant. In cold working, a higher force is required, but the strength of the metal will increase significantly. The use of simulation has become increasingly widespread to predict and describe process mechanisms and optimize the pre-forming process. The study was conducted using a three-dimensional (3D) simulation to predict the effect of variations in time, material and temperature on the damage of pre-forming blocks. The simulation results showed that the greatest damage occurred after 0.006 s and at 25 °C to the specimen 1 (Aluminium 1xxx) with the highest damage value of 0.011833 which occurred. Specimen 7 (Aluminium 3xxx) had the lowest damage with the value of 0.011542 which occurred after 0.010 s and at 25 °C.

The Effect of Rotational Speed, Friction Duration, and Pressure on Tensile Strength of AISI 6061 Welding Joints Dewi Puspitasari; Poppy Puspitasari; M. Rizka Gita Firmansyah; Solichin Solichin
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 1 (2018)
Publisher : Universitas Negeri Malang

Electric arc welding with covered electrodes is ideally suited for flat plates. If this technique is employed for welding rigid bodies, the results would be of poor quality. One viable solution to weld rigid bodies is through friction welding. The study aimed to investigate the tensile strength of specimens subjected to friction welding with variations in rotational speed, friction time, and pressure and to examine the microstructure of friction welding joints. This research used the one-shot case study design and involved descriptive analysis. The descriptive analysis described the results of tensile testing and microstructure of welding joints. Results showed that the specimen subjected to a 2850 rpm rotational speed, 60-second friction duration, and 8 MPa pressure had the highest tensile strength of 15.19 Kgf, whereas that rotated at 2850 rpm under 8 MPa pressure for 80 seconds had the lowest tensile strength, i.e. 12.25 Kgf. The photomicrographs showed that the friction welding joints underwent no phase change, but the refinement of Mg2Si particles occurred in the Zpd and Zpl zones. Also, the Zud zone consisted of the same form of Mg2Si particles as the untreated specimen.

Thermogravimetric and Kinetic Analysis of Cassava Starch Based Bioplastic Nanang Eko Wahyuningtyas; Heru Suryanto; Eddy Rudianto; Sukarni Sukarni; Poppy Puspitasari
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 2 (2017)
Publisher : Universitas Negeri Malang

Cassava starch based bioplasticfor packaging application has great potency because of the various starch-producing plants in Indonesia.Bioplasticcan contribute to reduce the dependence on fossil fuels andpetroleumthat can solve the environmentalproblem.Thepurpose of this research is to find out the thermal decomposition and the activation energy of cassava starch based bioplastic. The methods weresynthesis bioplastic with cassava starch as main component and glycerol as plasticizer. The thermogravimetry analysis was conducted to obtain the decomposition process mechanism of bioplastic and the heating valueof bioplasticwas measured using theadiabatic bomb calorimetric. Data analysis was conducted using a fitting model approach with an acikalin method to determine the activation energy. The result of thethermogravimetricanalysis showed thatbioplasticisgraduallydecomposedto the moisture, volatilematter, fixed carbon, andash in four stages mechanism. Totally decomposition of bioplastic was 530°C, then all of bioplastic was become the ash. The activation energy in the early and primary thermal decomposition stages are 1.27 kJ/moland 22.62 kJ/mol, respectively and heating valueof bioplastic is 15.16 MJ/kg.

Utilization Of Carbon Nanotubes In Electromagnetic Wave Detectors Muhammad Hanis Zakariah; Poppy Puspitasari
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 1, No 1 (2017)
Publisher : Universitas Negeri Malang

Direct detection of hydrocarbon by an active source using electromagnetic (EM) energy termed seabed logging (SBL) has shown very promising results. However, currently available electromagnetic wave technology has a number of challenges include sensitivity and frequency matching. This paper presents development of the carbon nanotubes (CNTs) as electromagnetic wave detector due to outstanding properties of carbon nanotubes. They are currently one of the desired materials for advanced technologies. Two types of detectors were developed in this work, carbon nanotube-based (D1) and without nanotube-based (D2) detectors. Various configuration and arrangement for each type of detector were investigated to determine the one with the highest detection measurement and stability of frequency stability of detection system. It was found that 20 turn-coils coil placed at its centre gives the maximum detection of induction voltage, 39.61 mV. However, the 20 turn- coils with CNTs which gives 36.50 mV is the preferred EM detectors due to the stability in frequency of the detection system.

Co-Authors A. A. Permanasari Abdul Razak, Jeefferie Abdullah, Muhammad Ilman Hakimi Chua Achyarsyah, Mochamad Adi Pangestu, Deni kusuma Afif Achsanul Choiri AGUS SETIAWAN Agus Suyetno Ahmad Atif Fikri Akbar, Muhamad Rizky Al-Irsyad , Muhammad Alief Muhammad Amat Mukhadis Aminnudin, Aminnudin Amir Hamzah Andika Bagus Nur Rahma Putra, Andika Bagus Nur Rahma Andoko Andoko, Andoko Anwar Johari Aprilia Sari Yudha Ardianto Prasetiyo Arifiansyah, Gilang Putra Pratama Avita Ayu Permanasari Bayu Angga Pratama Boedya Djatmika Busono, Milzam Rahmat Danang Priyasudana Dani Hari Tunggal Prasetiyo Darmawan, Muhammad Wahid Deny Yudo Wahyudi Dewi Puspitasari Didin Zakaria Lubis Didin Zakariya Lubis Diki Dwi Pramono Djoko Kustono Eddy Rudianto Erry Yulian Triblas Adesta Fadhila Wahyu Putri Fitriyanto, Retnaldi Fuad Indra Kusuma Ghazali, Mariyam Jameelah Ginta, Turnad Lenggo Habiby, M. Nuril Anwar Hasan Ismail Heru Suryanto Imam Muda Nauri ING Wardana Izzatus Tsamroh, Dewi Jaafar, Rosidah Jeefferie Abd Razak Kevin Valiant Cahya Komara, Erwin Kurniawan, Dany Ardymas Lorenzo, Gina A. M. Alfian Mizar M. Rizka Gita Firmansyah Maheswara, Dharma Mahfud Ihsan Majid Niaz Akhtar Malik Abdurrachman Mohamad, Noraiham Mohammad Tauviqirrahman Muhajir, Muhamad Muhamad Fatikul Arif Muhammad Hanis Zakariah Muhammad Hanish Zakariah Muhammad Ilman Hakimi Chua Abdullah Muhammad Kashif Muhammad Najib Mauludi Muhammad Rizka Gita Firmansyah Murdanto, Putut Mustapha, Mazli N. A. Ahmad Nanang Eko Wahyuningtyas Nanang Qosim Nandang Mufti Noraiham Mohamad Nur Aliza Ahmad Nursabrina, Aisya Pasang, Timotius Pasha, Muhammad Faizullah Pindo Tutuko Pramono, Diki Dwi Prasetya, Riduwan Prihanto Trihutomo Puput Risdanareni Purwanto, Muhammad Rizky Puspitasari, Dewi Radja, Muhammad Bustomi Rahmah, Anisa Ur Razak, Jeefferie Abd Razak, Jeefferie Abd. Razak, Jeefferie Bin Retno Wulandari Retno Wulandari Reyhandi Katon Asmoro Riana Nurmalasari Rosidah Jaafar S. M. S. N. S. Zahari Salam, Haipan Samsudin Anis Saputro, Suratno Adi Shaharun, Maizatul Shima binti Simonne Andrean Crisdion Siti Nur Azella Zaine Siti Zaleha Wahid Solichin Solichin Solichin Solichin Sukarni Sukarni Sukarni Sukarni Sumarli Sumarli T. Pasang Wahid, Siti Zaleha Wahidin, Ahmad Faizal Wahono Wahono Wahyu Kurnianto Wahyunengsih, Wahyunengsih Warestu, Ayu Wati, Rita Fajar Widiyanti Widiyanti, Widiyanti Winarto Winarto Wiwik Wahyuni Yahya Zakaria Yazirin, Cepi

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