Mohammad Tauviqirrahman

Mohammad Tauviqirrahman
Universitas Diponegoro | UNDIP · Department of Mechanical Engineering

Dr.

About

182
Publications
31,776
Reads
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593
Citations
Additional affiliations
December 2004 - present
Universitas Diponegoro
Position
  • Head of Department
Description
  • • Modeling lubrication and optimization in lubricated sliding contact • Surface texturing, boundary slip • Computational fluid dynamic (CFD) • Coupled fluid and solid analysis (FSI – Fluid Structure Interaction)
Education
April 2009 - November 2013
University of Twente
Field of study
  • Tribology
September 2004 - October 2006
Bandung Institute of Technology
Field of study
  • Mechanical Engineering
September 1999 - September 2003
Universitas Diponegoro
Field of study
  • Mechanical Engineering

Publications

Publications (182)
Article
Full-text available
It is a well-known fact that incorporating a slip boundary into the contact surfaces improves bearing performance significantly. Regrettably, no research into the effect of slip on the behavior of journal bearing systems operating with non-Newtonian lubricants has been conducted thus far. The main purpose of this work is to explore the performance...
Chapter
The main goal of this research is to evaluate the surface roughness level on the performance of journal bearing using the computational fluid dynamics (CFD) method. Aiming to further enhance the acoustic and tribological lubrication performance, a novel heterogeneous rough/smooth pattern is introduced. The results reveal that increasing the roughne...
Article
Full-text available
Tresca stress CoCrMo Body mass index 2D computational model Many investigations for developing total hip arthroplasty performance presented in previous literature show focusing on implant users' external factors. Although this is important, assessing loading based on implant user's weight also needs to be examined as it contributes to overall perfo...
Conference Paper
Full-text available
The paper available of total hip arthroplasty is still concerned with the external factors of implant user, but the internal factor that is the user’s body weight has not deeply understood. Our research presents deformation analysis of total hip arthroplasty with different loading conditions based on the patient’s body mass index category. 2D model...
Article
Full-text available
Hybridization of natural and synthetic fibers has the ability to improve composite performance. It means that the combination of natural fibers such as coir, jute, bamboo, and sisal with synthetic or glass fiber can broaden the role of the composite material, especially for structural application. This study developed a finite element simulation to...
Article
Total hip arthroplasty is a short-term solution for replacing a damaged hip joint with synthetic biomaterials. Total hip arthroplasty comes in two flavors: single and dual mobility. Mechanical and biological factors may degrade the quality of biomaterials over time. This may lead to implant failure and second surgical treatment. Wear is the crucial...
Conference Paper
Full-text available
This investigation aims to wear analyze of acetabular cup on metal-on-metal total hip arthroplasty with and without dimple addition. Our contribution that present in this paper is to explore the effect of surface texturing application to reduce wear that important for implant's survival. Finite element method is using with 3D human's hip joint load...
Article
One of the engine components used to reduce friction between two rotating machine elements is the bearing. Currently, studies on the provision of surface roughness on the bearing surface are being conducted to improve its performance. Simplification of surface roughness texture is modeled with various dimple shapes. There is still a paucity of lite...
Article
The ceramic tile wall is a decorative element used inside restaurants, museums, hotels, aristocratic residences, and places of worship. It plays a critical role in the development of a structure with strong personality and unique qualities by providing relief patterns specific to history or era. The demand for distinctive ornamental wall ceramics t...
Conference Paper
Full-text available
Ultra-High Molecular Weight Polyethylene (UHMWPE) is one of the most widely used biomaterials for applications in the field of medical devices, especially implants. The use of these materials together with metal is widely used for the combination of materials in total hip arthroplasty as hard-on-soft. Although the use of this combination of materia...
Article
This paper studies numerical analysis about the effect of the vortex finder (Tapered in-Cylinder out) geometric innovation in a cyclone separator. Four variations of the length of the vortex finder 0.5 Dc, 0.75 Dc, Dc, and 1.25 Dc will be simulated under cooling and without cooling conditions on the velocity flow field, cyclone performance, tempera...
Article
Most of the studies with respect to the use of water-lubricated journal bearing are mainly concerned with tribological performance, whereas few studies explore the noise characteristics of such bearing. In this study, the tribological and acoustic behavior of water-lubricated journal bearing is studied using a rigorous program containing combined C...
Article
Ultrahigh molecular weight polyethene (UHMWPE) is employed as a bearing material in a range of applications due to its improved elasticity, compatibility, and impact resistance, processing conditions for a suitable surface texture are necessary. Surface texture processing on microchannels using lasers is always associated with the effect of heat da...
Article
Ballistic resistant materials are materials containing right combination of hardness, strength, and toughness. The quench process produces high hardness and tensile strength but decreases toughness. The hardening process has been performed using an induction machine and a tempering process on a medium carbon steel plate. This work aimed to determin...
Article
Full-text available
The selection of biomaterials for bearing in total hip arthroplasty is very important to avoid various risks of primary postoperative failure for patients. The current investigation attempts to analyze the Tresca stress of metal-on-metal bearings with three different materials, namely, cobalt chromium molybdenum (CoCrMo), stainless steel 316L (SS 3...
Article
Full-text available
Introduction: Total hip prosthesis has become one of the important aspects of hip joint replacement surgery. The study about this implant to extent its lifetime is still limited on external factors of the patient that undergo replacement surgery. Besides, evaluating internal aspects also needs to be studied, there is users body weight. Methods: Rec...
Article
Full-text available
This study investigated the friction and wear pattern of silica-reinforced Styrene-Butadiene Rubber (SBR) in sliding friction with a steel blade indenter. The experiments were conducted using a pin-on-disc tribometer at various applied loads and examined under dry and wet contact conditions. Analysis was focused on investigating the coefficient of...
Article
Full-text available
The automotive industry's impact on development and improvement, reli- ability and lifetime, of components is significant. Automotive market en- courages small and medium enterprises (SMEs) to enter this market, which is for SMEs a challenge to meet specified product quality. In this study, running-in wear analysis of transmission gears is conducte...
Article
Full-text available
In the present study, a computational investigation into acoustic and tribological performances in journal bearings is presented. A heterogeneous pattern, in which a rough surface is engineered in certain regions and is absent in others, is employed to the bearing surface. The roughness is assumed to follow the sand-grain roughness model, while the...
Article
The milling process on a computer numerical control (CNC) machine is a crucial operation in the development of the modern manufacturing industry. Milling is the operation of peeling workpieces on machine tools that are often used in the manufacturing industry. The quality of the machining result is generally based on the surface roughness (Ra). The...
Article
Full-text available
Herein, a machining strategy to fabricate custom orthotic insoles with high surface finish and wide fit tolerance is presented. CNC milling was used to machine ethylene-vinyl acetate (EVA) foam for insoles with various surface hardness, and the Taguchi-response surface method (TM-RSM) was adopted to optimize the parameters of the CNC milling proces...
Article
Currently, the artificial hip joint is the best option for total hip arthroplasty, and the demand for this procedure is increasing annually. However, a major deficiency of artificial hip joints is the performance limitation in a wide range of movements, such as those in Muslim prayer (salat), a major religious practice that consists of seven positi...
Article
Full-text available
Ballistic limit is a speed limit where projectile with a certain shape, angle of attack and size is not able to perforate a target with certain properties and thickness. This paper aims is to determine and analyze the ballistic limit of commercial medium carbon steel plate which has been hardened by induction heating by using finite element based s...
Article
Full-text available
Club foot is one of the foot deformities due to genetic factors, diseases, the condition of pregnant women is too small, or the result of a marriage that has a kinship. For every 1000 normal childbirths, there is usually one birth of a child with a leg like this. Children with this leg shape often have difficulty doing daily activities. In this pap...
Article
Full-text available
In this paper, the design of orthotic boots in the club foot patient is investigated concerning the optimum condition of cutting parameters using computer-aided manufacturing. 3D CAD model insole is obtained from the scanning process until the design phase using reverse innovative design method. 3D CAD Model insole is designed using curve Base Mode...
Article
Full-text available
The slip boundary has an important influence on hydrodynamic journal bearing. However, less attention has been paid to the positive effect of slip on thermal behaviour. In this study, a computational fluid dynamics (CFD) analysis investigating the thermo-hydrodynamic (THD) characteristics of heterogeneous slip/no-slip bearings running under steady,...
Article
A cyclone is widely used in the industrial world for the particle separation process. Many geometrical and operational parameters affect the cyclone separator performance. The main aim of the present study is to investigate the effect of the position of the vortex limiter and the insertion of the metal rod on the heat transfer, flow field, and cycl...
Article
Full-text available
The design and manufacturing strategy using reverse engineering (RE) for Miranda Kerr Tea for One Teapot are presented in this paper. A computer-aided reverse engineering system (CARE System) was applied to minimize file errors generated by scanning Miranda Kerr Tea for One Teapot sample products made from Bone China clay. Digital data from the sca...
Article
The field of defense and security requires ballistic resistant materials for self-protection. Ballistic resistant materials must be able to withstand projectile spin rate and absorb impact energy. A combination of hardness on the surface and ductility on the other side is required to make the projectile resistance plate. Hardness is required to wit...
Article
Full-text available
In this paper, based on an analytical approach, the effect of pockets and boundary slip on the hydrodynamic performance of parallel sliding surfaces considering cavitation is investigated. A modified Reynolds theory is developed for solving two kinds of bearings: a single and a double pocket bearing. The performance is compared with respect to the...
Conference Paper
In the pen cover opening mechanism, the contact area on the body surface and the surface of the cover touch each other. When a surface is stressed and moved relative, the surface undergoes changes in conditions that cause heat. This is one of the causes of wear and damage to components. The author develops the design by analyzing contact using the...
Conference Paper
The sand sieve machine that has been designed and has a drive system consisting of a crank, shaft, and key. These three components interact with each other. This paper will explain the contact that occurred. The interaction will be simulated with the help of Abaqus software. Stages of simulation performed are preprocessing starting from making 3D i...
Article
Pesatnya perkembangan dalam bidang industri mempengaruhi para peneliti untuk melakukan berbagai macam inovasi. Salah satu penemuan yang menarik dalam bidang pelumasan hydrodynamic adalah desain tekstur pada bantalan thrust. Akan tetapi dengan adanya tekstur pada permukaan bantalan thrust terkadang justru dapat mengakibatkan efek negatif. Oleh karen...
Article
In this study, ethylene-vinyl acetate (EVA) foam orthotic shoe insoles with different surface roughnesses (Ra) are investigated in terms of CNC milling strategy. Based on a hybrid Taguchi-response surface methodology (TM-RSM) approach, machining parameters, including tool path strategy, spindle speed, feed rate, and step over, as well as material h...
Chapter
In this paper, the effect of slip on the lubrication performance (i.e. load support, friction) is investigated by computational fluid dynamic (CFD) approach. Various slip placements applied on textured zone of sliding contact is of particular interest. Additionally, the comparison of the performance between the analysis with the cavitation model an...
Article
Full-text available
Reverse innovative design (RID) of insole shoe orthotics for patients with diabetes and the manufacturing strategy in optimizing the production time of the insole were examined in the present work. The plantar surface of the feet from two female patients was scanned using a 3D scanner yielding a 3D mesh foot for each patient resulting in an STL fil...
Article
Full-text available
Surface texturing is becoming an effective way for increasing the performance of hydrodynamic bearings. However, introducing the texture on the lubricated sliding contact may lead to the presence of the inertia effect as well as the cavitation effect. In this study, the correlation between the inertia and the cavitation in textured bearing is inves...
Article
Full-text available
Increasing bearing performance in load support can be done by adding texture and artificial slip on one of the bearing surfaces. In this paper, a study is presented on fluid inertia and slip effect on the performance of textured hydrodynamic thrust bearings in load support by considering both cavitation and without cavitation. The results obtained...
Article
Full-text available
Ballistics testing is the study of collision phenomena between projectiles and target material. Simulation with finite element is one alternative to ballistic testing that can provide detailed numerical data and specific. Validated simulations can be used as a reference for improving projectile resistant material in addition to the results of exper...
Article
Full-text available
Food, pharmaceutical, mineral and petroleum industries often use fluidized bed dryers for the drying process. In the present study, fluidized bed dryers in the tea processing industry is of particular interest. The main aim of this work is to investigate the effect of on the static bed height on the the coefficient of heat transfer in the fluidized...
Article
Full-text available
This work reports a stirred-batch lab crystallization to examine the influence of maleic acid (HO 2 CCHCHCO 2 H), and temperatures (30 and 40 °C) on crystallization kinetics and morphology of struvite. The crystallization was followed by measuring the pH change up to 70 min. The pH decreased drastically for the first 5 min of the run, then starte...
Article
All product innovative of manufacturing industry are now designed and developed using CAD (Computer aided design) software. In the present study, geomteri model of foot produced from the insole shoe orhotic product (ISO product) corresponding to the counter of relief malformed legs due to illness (foot deformity) are described in detail in the form...
Article
Full-text available
A compact heat exchanger can be found in air conditioning, automotive industry, chemical processing, etc. Most compact heat exchangers use gas as a heating or cooling fluid. However, gas has high thermal resistance, which affects lower heat transfer. In order to reduce thermal resistance on the gas side, the convection heat transfer coefficient is...