Waluyo Adi Siswanto

Muhammadiyah University of Surakarta · Mechanical Engineering

A combination of aluminum columnar member with composite laminate to form a hybrid structure can be used as collapsible energy absorbers especially in automotive vehicular structures to protect occupants and cargo. A key advantage of aluminum member in composite is that it provides ductile and stable plastic collapse mechanisms with progressive def...

The paper describes a work focused on the process of perforation of aluminum sheet. A numerical investigation has been carried out to analyze in details the perforation process subjected to normal impact by different nose shapes of projectiles. The perforation process has been simulated by the application of 3D analysis using IMPACT dynamic FE prog...

(http://dx.doi.org/10.1155/2014/301271) The aim of this work is to improve the accuracy of cold stamping product by accommodating springback. This is a numerical approach to improve the accuracy of springback analysis and die compensation process combining the Displacement Adjustment (DA) method and the Spring Forward (SF) algorithm. This alternate...

The three-rattle angklung is a traditional musical instrument made of bamboo. The objective of this research is to observe the unique sound characteristics of the three-rattle angklung. The sound characteristics data can be used for defining digital sound of angklung to be played in a digital synthesizer. One set of angklung from the big size C5 to...

One of manufacturing problems in sheet metal forming is springback. This elastic recovery occurs when unloading the formed part off the tooling dies, resulting in shape inaccuracies. Optimizing the geometry surfaces of the tools can be used to accommodate the springback, so that after the unloading process, the formed part meets the target shape. T...

This study explores the geometrical deviations that occur in cold stamping, which are caused by the spring-back effects in elastic metals after forming. The primary aim is to introduce and assess the Combination Approach. This approach seamlessly integrates the Displacement Adjustment and Spring Forward methods for die compensation. This multi-stag...

Due to their individual plastic deformation behavior and mechanistic performances, gradient nano-grained (GNG) metals have been identified as promising materials for application in advanced engineering applications. However, their plasticity mechanism has not been thoroughly investigated. Hence, in this work, molecular dynamics simulation was emplo...

This research study was focused on the effect of bamboo charcoal powder on the tensile strength of wood plastic composite reinforced with rice husk ash (silica). This study used 3 different proportions of composite that is 10% bamboo charcoal powder-90% polypropylene, 20% bamboo charcoal powder-80% polypropylene and 30% bamboo charcoal powder-70% p...

Intermetallic systems of Nickel (Ni), Aluminium (Al), and Titanium (Ti) are candidates for lightweight materials that offer high-temperature resistance. Combustion synthesis has been widely studied to produce intermetallic and coating deposition by exploiting the heat released by the combustion. An underlayer is often used to enhance the adhesion o...

Understanding the relation between spatial heterogeneity and structural rejuvenation is one of the hottest topics in the field of metallic glasses (MGs). In this work, molecular dynamics (MD) simulation was implemented to discover the effects of initial spatial heterogeneity on the level of rejuvenation in the Ni 80 P 20 MGs. For this purpose, the...

The residual stress generated after thin layer TiN coating by Physical Vapor Deposition is reducing the mechanical and tribological properties of TiN. Thermal stresses are one of the residual stress components which can cause failure modes of proper coatings. In this article, a validated computational simulation was developed to investigate the eff...

The objective of this research is to study the effect of water content on particle characterization and agglomeration of bamboo charcoal resulted from ball milling process. The characterization is determined by the particle size and the morphology of the particle. The milling was performed in cylinder vial of stainless steel. The element of milling...

This article presents experimental data on oil palm biomass (oil palm leaves, oil palm trunk and empty fruit bunch) handsheet production characterization by biodelignification treatment using Bacillus cereus extracted from termite gut (Coptotermus curvignathus). It associates the lignocellulose chemical composition obtained via technical associatio...

Purpose The purpose of this study is to investigate the effect of aging temperature on the barrel-type solder joint lifetime of electronic devices and to include these effects in the modified prediction model. Design/methodology/approach Several accelerated shear stress tests under different stress amplitudes and aging temperatures were performed....

One of the techniques to improve the surface hardness of commercially pure titanium is by using plasma nitrocarburizing. This paper presents an equation to predict the surface hardness with the variable of the treatment temperature and process time of plasma nitrocarburizing. Experimental studies were first conducted to collect surface hardness at...

This study aims to make an alternative of robotic arm control system. The system developed will replace numeric control into a data logger system.The system records manually data movement and applied the recording data into robot arm. 6 potentiometers of 10 kΩacting as sensors, a robot arm with 6 motor servos of MG995 acting as actuators and a micr...

This research aim at providing information of the cutting temperature, vibration and chip formation on machining stainless steel 316 under dry and flood coolant. The chosen material for the workpiece was a stainless steel, 316L. The milling performance was evaluated respectively by cutting temperature, chip thickness and vibration. The tools to mea...

The aim of this work is to develop an electronic kit controller for motorcycle engine, to be able to increase power and torque than standard one. The kit developed is based on Arduino Uno microcontroller. The test engine is a 108.2 cc cylinder capacity Honda PGM-FI eSPwith compression ratio of 9.5:1. The testing engine has applied electronic contro...

In this study, the simultaneous role of thermal cycling and electric current on the microstructure and degradation behavior of solder joints was investigated. For this purpose, FEM simulations and experimental works were performed on IGBT modules with the diverse solder joint thicknesses of 50, 70 and 90 μm. The results showed that the thermal cycl...

The objectives of the study is to investigate the formation of intermetallic compound and the mechanical properties of the underwater welding. AISI 4012 steel was selected as the material and two types of electrode E6013 and E7018. The variations of electric current used in this study were 80,100, and 120 amperes. The underwater welding was conduct...

Sand casting is one of manufacturing process that still exist today. Numerous products are produced to serve industrial and domestic use. Defect could lead to product performance, and unfortunately inevitable in a casting process. This paper aim to investigate typical defect resulted from sand casting process. An aluminum cooling fan was selected a...

The aim of this work is to characterize particle of bamboo leaves charcoal produced by ball milling process. The characterization parameter are the particle size and the morphology of the particle. The milling process was completed in a cylinder vial made from stainless steel. The milling element was a steel ball. The dimension of the cylinder vial...

Motivated by recent works indicating the role of AC current on the reliability of electronic systems, the microstructural characterization and mechanical properties of solder joints, as vulnerable parts of electronic packages, under different alternating current shapes were investigated. The sine-, square- and triangle-waveform currents were consid...

To conduct an experiment of thermal radiation. The researchers conducted a simulation to study the behavior of the damage float glass using Mecway 10 FEA software. The ambient time and temperature on the first float glass sheet sustaining thermal transient and thermal stress are the most important parameters to find out the part of float glass. Ana...

The aim of this research is to develop an Engine Control Module (ECM) manipulator module of motorcycle engine, to produce higher power and torque than standard one. An Oxygen sensor of narrow band type was used to detect the oxygen in the exhaust manifold. The narrow band type of oxygen sensor is used to maintain the air fuel ratio (AFR) at certain...

This study aims at evaluating stress on piston, connecting rod, and the crankshaft of the 4-stroke diesel engine due to compressive and thermal loads. The study applied the finite element method, the design was made using CATIA V5, and analysis was carried out in steady-state using ANSYS R15. Mechanical and thermal compressive loads were applied ba...

This study aims to identify the stress concentration and distribution pattern in the mid-cross-section of a concrete block in a four-point bending (FPB) test with notch and without notch using a finite element method (FEM). The research was preceded by a meshing sensitivity analysis (MSA) with verification of reference from FPB test deflection theo...

This study aims to evaluate results of radiant heat transfer on float glass surface, where radiant heat and convection rate are distributed from initial glass heating to the maximum or final temperature of the float glass using varied temperature and thickness by means of Mecway FEA simulation. This research also seeks to measure thermal stress on...

The paper describes a work focused on the process of perforation of multilayer advanced high strength steel (AHSS). A numerical investigation has been carried out to analyze in details the perforation process subjected to normal impact by different nose shapes of projectiles. The perforation process has been simulated by the application of 3D analy...

Products by solid-state recycling of aluminum chips in hot extrusion process were controlled by temperature related parameters using preheating temperature 450 °C, 500 °C, and 550 °C for 1 hr, 2 hr, and 3 hr preheating time. By using Design of Experiments (DOE), the results found that the preheating temperature is more important to be controlled ra...

One of the surface treatments to improve the hardness of the surface is by ion implantation process. This paper presents an equation to predict the surface hardness with the variable of the process time in ion implantation surface treatment. The hardness of three surfaces data were collected experimentally from various process times, i.e. 140 minut...

The purpose of this research is to investigate the corrosion resistance of 5052 aluminum alloy to increasing salinity in sea water. Salt spray chamber was used to measure and compare the corrosion rate of 5052 aluminum alloy with weight reduction method. The experiment was conducted by varying the three concentrations of NaCl solution to compare th...

Products by solid-state recycling of aluminum chips in hot extrusion process werecontrolled by temperature related parameters using preheating temperature 450 °C, 500 °C, and 550 °C for 1 hr, 2 hr, and 3 hr preheating time. By using Design of Experiments (DOE), the results found that the preheating temperature is more important to be controlled rat...

The purpose of this work is to show the effects of drop impact on the creep-fatigue evolution of solder balls in an electronic device. Finite element method analysis was carried out for evaluation of stress and strain distribution in the solder joints. According to the simulation outcomes, the thermal cycling made an accumulated creep strain in the...

Untuk melakukan pengujian temperatur radiasi. Peneliti menggunakan simulasi untuk mempelajari perilaku kerusakan atau keretakan kaca float lembaran menggunakan sofware Mecway 8 FEA . Dimana waktu dan suhu sekitar pada lembaran kaca float yang pertama mengalami perubahan temperatur adalah parameter yang paling utama untuk mengetahui bagian kaca yang...

High strength to weight ratio of aluminium reinforced as metal matrix composites is a well known material used in automotive application. The effects of recycled aluminium chips AA7075 with amorphous silica by rice husk ash on the physical properties and microstructure were investigated. Recycled aluminium chip AA7075 was reinforced with agro waste...

This paper presents the modification of an existing front inner bumper of a passenger car. The manufactured bumper was captured by using three-dimensional scanner ATOS-GOM in order to obtain the CAD cloud geometrical data. Impact analysis was the conducted by employing dynamic explicit time stepping algorithm software IMPACT. The software was first...

This paper presents a work focus in constructing a parallel computer from cluster of cheap PCs and evaluating parallel performance of impact simulation. The software used for handling the exercise is IMPACT dynamics finite element program suite. This parallel application supports by Java with threads and synchronization mechanisms. The JavaParty al...

The aim of this project is to apply the automatic fish feeder controller system for fish pellet dispersion machine. The system uses Arduino as a microcontroller which programmed by setting the speed and timer of each DC motor to make this machine functioning automatically. When the adapter is switch, the microcontroller will be connected then activ...

Ways to improve sport performance become exceptional contemporary interest. Nowadays, many studies use human brain as an input signal include eyes blinking, attention and meditation to control the exchange process. Brain–Computer Interface (BCI) requires generating control signals for external device by analysing the internal brain signal. The obje...

The aim of this research work was to find the best arrangement of nozzles inside the chimney tower to reduce the temperature and to increase the entrainment mass flow. An existing design of the nozzle arrangement was used as the reference. Six configuration models as replacement alternatives were tested by using Computational Fluid Dynamics (CFD),...

The aim of the research work was to investigate the position of sail and the additional notch on tail of a mini submarine to reduce the force resistance. The tail position parameter was modelled as the ratio of the submarine the total length of the hull (L) to the sail distance (X), whereas the notch was represented by several notch designs. Comput...

This work is the development of boundary element method for elastoplastic plate analysis to include elastic-linear hardening material. The plate is subjected to bending, in-plane and combined bending and in-plane. The plastic zone is evaluated by using von Mises criterion. The cell discretization is implemented to solve numerically the domain integ...

This paper presents the effect of humidity on the goat skin membrane of traditional musical instrument kompang. Three kompang samples with similar size of 25 cm diameter were exposed to three different relative humidity (RH) conditions (50% RH, 70% RH and 90% RH) under the Climate Chamber. The tension and the vibration frequency were measured every...

This paper presents a mathematical model of the traditional musical instrument, the kompang. In this study, a mathematical model of the kompang membrane is developed to simulate the vibration of the kompang membrane in polar coordinates by implementing the Fourier-Bessel wave function. The wave equation in polar direction is applied to provide the...

Numisheet 2005 merupakan suatu konferensi internasional yang membahas tentang perubahan konsep dan teknologi baru pada lingkup simulasi sheet metal forming, konsep dan teknologi baru tersebut dimasudkan untuk memenuhi kebutuhan semua industri metal forming. Untuk memenuhi kebutuhan para desainer dan juga ilmu pengetahuan, konferensi menentukan tiga...

'Silat' is a Malay traditional martial art that is practiced in both amateur and in professional levels. The intensity of the motion spurs the scientific research in biomechanics. The main purpose of this abstract is to present the biomechanics method used in the study of 'silat'. By using the 3D Depth Camera motion capture system, two subjects are...

Behaviour such as gait or posture may affect a person with the physiological condition during daily activities. The characteristic of human gait cycle phase is one of the important parameter which used to described the human movement whether it is in normal gait or abnormal gait. This research investigates four types of crouch walking (upright, int...

In this study, the model of hip joint and the main muscles are modelled by finite elements. The parts included in the model are hip joint, hemi pelvis, gluteus maximus, quadratus femoris and gamellus inferior. The materials that used in these model are isotropic elastic, Mooney Rivlin and Neo-hookean. The hip resultant force of the normal gait and...

The concept of the screw press is to compress the fruit bunch between the main screw and travelling cones to extract the palm oil. Visual inspection, model development and simulation of screw press by using Solidworks 2016 and calculation of design properties were performed to support the investigation. The project aims to analyse different design...

This paper presents a numerical membrane model of traditional musical instrument kompang that will be used to find the parameter of membrane tension of x-ray membrane representing the classical goat-skin membrane of kompang. In this study, the experiment towards the kompang is first conducted in an acoustical anechoic enclosure and in parallel a ma...

We compared the quasi-static and dynamic simulation responses on elastic-plastic deformation of advanced alloys using Finite element (FE) method with an explicit numerical algorithm. A geometrical model consisting of a cylinder-on-flat surface contact under a normal load and sliding motion was examined. Two aeroengine materials, Ti-6Al-4V and Super...

This paper addresses the plastic strain and stress behaviour of sliding contact using two different plasticity models and sliding amplitudes. A numerical two-dimensional (2D) cylinder-on-flat contact model subjected to normal loading and sliding is investigated. The elasto-plastic Ti-6Al-4V alloy is examined under quasi-static condition in this sim...

This paper characterized a fracture brass sample that underwent tensile testing. The aim of the case study is to characterized the brass sample with unknown microstructural arrangement and unknown elements composition. Tests were conducted based on the SEM imaging technique, EDX chemical analysis and XRD microstructural spatial analysis to indentif...

The objectives of this study are to evaluate the decrement rate in the ice bath water temperature in different environment conditions and study the decrement rate in the ice bath water temperature using a different pump capability. First, in the study of different environment conditions, the decrement rates of water temperature were tested with and...

This paper discusses a finite element analysis of a flat plate subjected to normal constant loading (cylinder-on-flat configuration) with reciprocating sliding contact. The material properties follow a linear kinematic hardening plasticity model and the manipulated reciprocating tangential displacements are simulated for different sliding amplitude...

Team sports coaches are always looking for tools to help them in their coaching routines. They are more toward statistical analyses and quantitative judgements like never before. Decades have passed, manual counting of athletes' attempts and blocks are no more practical for today's fast-paced team sports. In recent years, various commercial motion...

In sport therapy, ice bath cooling is a treatment to rehabilitate soft tissue and muscle trauma after a period of intense exercise. Rehabilitation is important for an athlete to maintain their performance at all time. This project is aimed to introduce a proper arrangement of inlet and outlet nozzles of a square athlete ice-bath pool system current...

This paper presents contact pressure prediction results based on numerical solution using implicit and explicit finite element method (FEM) verified by Hertzian contact theoretical solution. The contact pressure distributions are investigated for a simple cylinder-on-flat contact configuration model subjected to constant normal load. The FEM analys...

This paper presents the residual stress behavior under various values of friction coefficients and scratching displacement amplitudes. The investigation is based on numerical solution using explicit finite element method in quasi-static condition. Two different aeroengine materials, i.e. Super CMV (Cr-Mo-V) and Titanium alloys (Ti-6Al-4V),are exami...

This paper presents frequency analyses of sounds produced by traditional Malay musical instrument “kompang”. Kompang is used to produce exotic sound especially certain grand ceremony. In order to produce sound, different types of skins are used especially made from polymer (used x-ray film) and animal skins. However, the sound produced by a polymer...