Rifky Ismail

Rifky Ismail
Universitas Diponegoro | UNDIP · Center for Biomechanics, biomaterials, biomechatronics and biosignal processing (CBIOM3S)

Dr.

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173
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Publications

Publications (173)
Article
The Twin Wire Arc Spray (TWAS) is one of the most widely used types of thermal spray coating because of its low cost, high efficiency and can also be used for mass production. However, heat treatment after the Fe-based amorphous coating process uses the TWAS method on pump impellers made of 304 stainless steel are not well documented. The purpose o...
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...
Article
The Anteroposterior translational distance (AP) is one of the parameters used to assess stability in the artificial knee joint (AKJ), this translation is influenced by the posterior tibial slope (PTS) and the type of implant. The tibiofemoral contact of the medial pivot system on the AKJ provides satisfaction to the patient, especially for activiti...
Article
A greater flexion angle in total knee arthroplasty (TKA) is desirable for replacing the human knee joint damage of people living in the Middle East and Asian regions. This flexion angle is a significant clinical factor affecting the range of motion for patients. Therefore, this study aims to optimise the flexion angle in the design of the Artificia...
Article
Disability issue has increased in recent years due to the high number of accidents and vascular disease. Loss of limb function for people with amputations often results in an abnormal gait. Energy Storage And Return (ESAR) foot prostheses provide an alternative to help improve gait and minimize metabolic energy expenditure during the walking phase...
Article
Transtibial and transfemoral amputations are the most common amputations in the world, loss of lower extremity result in impaired function extremities and also body balance. A prosthesis is a medical device designed to replace a specific body part to restore function to a body part lost due to an accident or disease. Most doctors strongly recommend...
Article
The Investment Casting (IC) process is a type of casting that can produce the suitable shape and size of components by minimizing porosity and defects. However, research on ICs for the manufacture of artificial hip joints made from Ti6Al4V is still lacking. Therefore, the purpose of this study is to determine the mechanical properties of an artific...
Article
Biocomposite is a material that have potential to heal injured bones and teeth due to their biocompatible, non-toxic, non-inflammation, and bioactive properties which can prevent infections that occurs frequently during surgical processes. Biocomposites made of PLA, PCL, and HA from bovine bone as a substitute for metal materials in medical applica...
Article
The crab shell (Portunus Pelagicus) wastes are constituted of major calcium carbonate (account for 70 wt. %) and have the potential to reuse as a starting biomaterial for precipitated calcium carbonate (PCC) products. The purpose of the present work was to synthesize PCC powder using crab shells based on the gas-solid-liquid carbonation route. In t...
Article
Full-text available
Nomenclature A Position of point A in (x, y) coordinate (mm) B Position of point B in (x, y) coordinate (mm) XD Position of point D in the x-axis (mm) YD Position of point D in the y-axis (mm) XE Position of point E in the y-axis (mm) YE Position of point E in the y-axis (mm) a Length link of link AO1 in closed-loop six-bar linkage (mm) b Length li...
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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
Background: Upper limb weakness is the most disability caused by stroke. The availability of physiotherapists is still limited in Indonesia. The exoskeleton robot is a developing technology that involve in stroke rehabilitation therapy. Objective: To evaluate the effectiveness of exoskeleton robot-assisted therapy on improving muscle strength of pa...
Article
Full-text available
As with all artificial joints, wear debris is of particular concern due to its effect on both implant life and the in vivo biological reactions that can occur. The purpose of the research is to study debris characterization of PCU. Wear particle is produced from testing the PCU material using a pin on disc wear tester within 50000 cycles. This stud...
Article
Monocalcium phosphate monohydrate (MCPM) powder with nano-size particles was synthesized by a low-cost powder precursor of green mussel shells in a laboratory magnetic stirrer. In the present study, powder processing procedures included stages of preparing the raw mussel shells into the high-quality precipitated calcium carbonate (PCC) through wash...
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
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em> Cover body merupakan salah satu komponen sepeda motor yang berfungsi sebagai penutup rangka agar terlihat rapi dan sebagai pelindung bagian rangka dan kelistrikan dari kotoran maupun air. Cover body terbuat dari material polypropylene . Sebagian besar kerusakan yang terjadi pada cover body berupa fracture (patah). Tujuan dari paper ini adalah u...
Article
Green mussel shells contain a high content of calcium that can be potentially used for starting biomaterials. A powder processing and subsequent calcination-dissolution-precipitation (CDP) technique for recycling the shells into the value-added of precipitated calcium carbonates (PCC) is presented in this paper. In the experimental study, the recei...
Article
Full-text available
Background: AISI 316L stainless steel material is one of the widely used hip joint implant material. Even with excellent properties for the hip joint implant, this material is likely to fail after 12-15 years of implantation because of excessive wear and stresses. The computational analysis using the finite element method can be used to analyze t...
Article
Full-text available
Biomaterial development is currently being carried out to help people who have daily needs. Hydroxyapatite has biocompatibility properties and suitables for the use as a biomaterial. Hydroxyapatite can be found in natural sources sometimes as waste. One of the hydroxyapatite fabrication methods is calcination process. Calcination and sintering are...
Article
Persons with disabilities often difficulties when traveling and mobility in daily activities, especially with movement disorders. Many tools have been developed for people with disabilities to support mobility. One of them is a traveling wheelchair. Based on preliminary studies, it is known that the dimensions of traveling wheelchairs tend to be sm...
Article
Latar Belakang: Setelah serangan stroke, penderita umumnya mengalami hemiparesis ekstremitas superior. Keterbatasan gerakan terjadi karena penurunan ROM sendi siku dan abnormalitas tonus otot lengan atas sehingga penderitanya perlu menjalani terapi rehabilitasi. Selain terapi konvensional, kini telah berkembang robotic therapy dalam memperbaiki fun...
Article
Hydroxyapatite is generally utilized in medical fields especially as a substitute to bone and teeth. Hydroxyapatite nanoparticles have been succesfully synthesized from green mussel shells as a source of calcium carbonate by hydrothermal method. The green mussel shells were calcined, hydrated, and undergone carbonation to form Precipitated Calcium...
Article
Full-text available
Crosslinked ultra-high molecular weight polyethylene (UHMWPE) is a preferred material used as a bearing material in the artificial hip joint. The purpose of this study was to analyze the effect of dose cross-linking acetabular liner manufactured by CNC milling on wear depth. The wear test is carried out with a tribometer machine by loading the acet...
Article
Full-text available
An alternative way for increasing the strength of the runner’s prosthesis is by utilize the direction of fiber orientation. The aim of this research is to determine the effect of the orientation carbon-glass fiber reinforced composite on its bending strength. The main materials used in this study are carbon and glass fiber. The independent variable...
Article
Full-text available
A hand is one of the essential limbs on the human body that is used for daily activities. The aim of this research is to develop a soft exoskeleton hand to assist people with hand deterioration. The developed exo-glove is made of low-cost RTV (room-temperaturevulcanizing) silicone rubber with a motor-tendon actuation system that produces the flexio...
Article
Full-text available
The use of fiber-reinforced polymer (FRP) for prosthetic devices is now very common. Various polymer resins have been reinforced the fiber yielding composite with better strength-to-weight characteristics compared to a single material and also providing better biocompatibility. The purpose of the present study was to examine a single glass, carbon...
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...
Conference Paper
Prosthetic sockets are used as the interface between the stump and their prostheses. Most of the materials used to fabricated the sockets have been used for many years, these materials like copolymer, carbon fibre and nyglass based laminations. This study is developing of water hyacinth fibre as natural fibre used to fabricated the prosthetic socke...
Article
Full-text available
Ultra-high molecular weight polyethylene (UHMWPE) is a biomaterial that is widely used in the manufacture of acetabular liners for the application of artificial hip joints (AHJ). The problem that often arises from UHMWPE material is the occurrence of wear debris as a result of the mechanism of contact of UHMWPE material with its partner material on...
Article
Full-text available
Total hip arthroplasty (THA) is one of the most successful orthopedic surgical procedures. Impingement believed to be the most common mechanism of dislocation after THA. Salat consist of several repeated physical movements which require several extreme hip joint movements. The potential impingement positions during salat activity have been revealed...
Chapter
The manufacturing technology of tire rubber material to improve its performance is still developing. Mechanical and tribological properties are considered in the rubber manufacturing. One of the important tribological properties is the braking capacity of the tire which is strongly associated with sliding contact. However, theoretical as well as ex...
Article
Full-text available
Hardness is an important mechanical property to express the rubber material’s properties. The hardness is closely related to elastic modulus value that is usually obtained by indentation technique. In elastic modulus investigation, the indentation method is more practical to be applied than tensile test method. Analytically, due to the hyper-elasti...
Conference Paper
Full-text available
This paper presents the development of the manufacture of a transtibial prosthetics socket for the belowknee amputee. A technique used in this paper is using photogrammetry. The quality of the photogrammetry method is determined by measuring the error of the photogrammetry 3D model with the actual model using four different cameras. The 3D model of...
Article
Full-text available
Steel that has been heat treatment using quenching is hard but brittle. Tempering was done to remove the agility caused by the residual stress. The objective of this paper writing is to know and analyze the effect of tempering temperature on the mechanic property of steel plate of the surface hardening result. Steel plate with thickness of 8 mm of...
Article
For design of marine propeller, the energy supply from marine engine to the propeller should be converted to thrust force with minimum losses. Furthermore, the unwanted vibration and cavitation due to the overlooking a detail calculation of the propeller should be prohibited for increasing the fuel efficiency and life-span of the propeller. In the...
Article
Full-text available
Loss of muscle functions, such as the elbow, can affect the quality of life of a person. This research is aimed at developing an affordable two DOF soft elbow exoskeleton incorporating a dual motor-tendon actuator. The soft elbow exoskeleton can be used to assist two DOF motions of the upper limb, especially elbow and wrist movements. The exoskelet...
Article
Full-text available
Based on the study of water hyacinth fibres, the results of tensile tests and compressive flexural tests for water hyacinth fibre composites laminated with methyl methacrylate resin as reinforcing materials for the manufacture of trans femoral socket prosthesis, showed there is no significant difference in strength and flexibility between water hya...
Article
Perkembangan wearable elbow exoskeleton sejalan dengan perkembangan robotika, dimana untuk beberapa keperluan untuk digunakan membutuhkan penyesuaian pada penggunaan material. Pada perkembangan robotika, jenis robot dibedakan menjadi 2 jenis yaitu hard robotic dan soft robotic berdasarkan material yang digunakan.. Pada wearable exoskeleton robotic...
Conference Paper
Full-text available
Cemented system is the most widely system used in the operation of Total Hip Replacement (THR). In order to ensure the reliability, there are many studies have been conducted previously. One of them investigated the additional of 1 mm layer between liner and cement in which the stress on the layer can be reduced about 47% between the layered artifi...
Conference Paper
Full-text available
Upper limb disabilities become a serious concern in Indonesia. There are many prosthetic hand products from other countries, yet they rarely fit to Indonesian citizen, neither for the price nor the size. Due to this reason, Diponegoro University developed a prosthetic hand to solve the problem currently faced by the Indonesian citizen. It is expect...
Article
This research is motivated by the study period of Mechanical Engineering students in UNDIP that is still quite long, more specifically dealing with the execution time of the Final Project (FP) that still quite long compared to the average in other departments in the Faculty of Engineering of Diponegoro University. Students can take the FP if it has...
Article
Full-text available
In the developing countries, the need for prosthetic hands is increasing. In general, transradial amputee patients use prosthetic hands that are passive like a body-powered prosthesis. This research proposes a low-cost myoelectric prosthetic hand based on 3D printing technology. Hand and finger size were designed based on the average size of human...
Article
Full-text available
CNC milling is a flexible technology for machining UHMWPE with low machinability. This study was undertaken for modeling of the experimental data with CNC milling parameters (spindle speed, feed rate, and step over) against the response of surface roughness of UHMWPE acetabular cup. Here the significant machining parameters on the surface roughness...
Article
Full-text available
Fungsi utama sendi panggul adalah sebagai penopang tubuh manusia dalam melakukan berbagai aktivitas dalam kehidupan sehari-hari. Secara mekanis sambungan pada sendi panggul (hip joint) merupakan socket and ball joint yang menghubungkan antara fermur head dan pelvis acetabulum. Pada banyak kasus, sendi panggul ini dapat mengalami kerusakaan permanen...