
Chanyaphan VirulsriChulalongkorn University · Department of Mechanical Engineering
Chanyaphan Virulsri
phD
About
28
Publications
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Introduction
Biomechanical Design and Manufacturing
Publications
Publications (28)
Purpose
To compare the load distributed to the medial tibial articular cartilage after refixation of posterior medial meniscus root tears between the suture anchor and transtibial pullout techniques in posterior medial meniscus root tears.
Methods
Twelve Thiel's embalmed human cadaveric knees are used and divided into three groups (four knees in e...
We assess the shear strength of a commercially pure titanium (cp-Ti) implant coated with hydroxyapatite (HA) in the intramedullary canal of miniature pigs' femur. The research involved the utilization of cylinders coated with cpTi-HA, which had an average diameter of 9 mm and a length of 10 mm. The interfacial strength between the bone and the impl...
We have developed a novel osteosynthesis plate with bone union detection using a wire's natural frequency (BUDWF) to provide the quantitative result of bone union detection. The concept for detecting bone union is measuring the rate of frequency change. The frequency is measured from sound generated from the wire attached to a modified plate. The p...
Background/objective
During the initial stages of rehabilitation after anterior cruciate ligament (ACL) surgery, a pivotal role is played in ensuring effective recuperation and averting complications. An often-employed strategy to tackle ACL laxity during this period involves the incorporation of synthetic materials for reinforcement. The objective...
A conventional 4-bar polycentric knee and solid ankle cushion heel foot (SACH foot) have been commonly used in developing countries. However, they cannot perform stance-phase knee flexion, which makes a person with an amputation walk unnaturally and with less stability. This research proposes a novel design of a 4-bar polycentric knee with stance-p...
The purpose of our biomechanical study was to assess load-to-failure, stiffness, gap formation following cyclic loading, and the failure mechanism for anterior cruciate ligament (ACL) repair comparing the cortical suspensory button and knotless anchor suture. Eight Thiel’s embalmed paired cadaveric knees from four cadavers were dissected. The speci...
Sufficient grip force and appropriate grasp speed provided by a prosthetic hand are essential for daily use. However, due to limitations in size and weight, it is very challenging to select motors that can generate enough power to provide sufficient grip force and high grasp speed. Accordingly, this research proposes a new prosthetic hand design us...
A femoral fracture is a severe injury occurring in traumatic and pathologic causes. Diagnosis and Preoperative planning are indispensable procedures relying on preoperative radiographs such as X-ray and CT images. Nevertheless, CT imaging has a higher cost, radiation dose, and longer acquisition time than X-ray imaging. Thus, the fracture 3D recons...
Outcomes of users provided with a commercial ESR Vari-Flex foot (Össur, Reykjavik, Iceland) and a locally designed sPace foot were investigated. Step activity with users' own prosthetic foot compared to the sPace foot was explored.
Methods:
Eleven individuals with unilateral trans-tibial amputation participated and were provided with an sPace and...
This paper presents a novel indirect cryogenic cooling system, employing liquid nitrogen (LN2) as a coolant for machining the difficult-to-cut ASTM F-1537 cobalt-chromium (CoCr) alloy. The prototype differs from the already existing indirect cooling systems by using a modified cutting insert that allows a larger volume of cryogenic fluid to flow un...
Excessive postural sway while standing can lead to falls and injuries. A designed wearable balance assistance device which consists of scissored-pair control moment gyroscopes and a two-axis inclination sensor is introduced to reduce fall risk from excessive sway among the elderly. The prototype has dimensions of H50cm×W44cm×D30cm and weighs 15.03...
In manufacturing of femoral head prostheses, the roundness of the femoral head is important. In order to reduce out-of-roundness when machining with a conventional CNC machine, a compensation technique with a fast tool servo was developed. The fast tool servo with piezoelectric actuator was fabricated and installed on a conventional CNC machine, an...
Background: Hydraulic knee prosthesis can provide stance phase control and swing phase control suitable for active persons with an amputation. However, typical commercial hydraulic knees are costly and require frequent maintenance making them inaccessible for persons with an amputation in low-income countries. The objective of this article is to pr...
Impaired balance control ability and degraded functional mobility increases the risk of falling in elderly people. The elderly show more postural sway when standing compared with young people. A sway fall occurs when the center of gravity moves outside the limit of stability. In order to reduce the fall risk from the excessive sway, this study pres...
In hand prosthesis design, the important characteristics that directly affect hand performance are the ability to grasp various type of objects, grasping force that provides stability for holding objects, and cosmetic appearance that resembles the human hand. The presence of all of these characteristics is currently a challenging task for prosthesi...
Background:
The alignment of the lower limb prosthesis is an integral part of the prosthetic fitting. A properly aligned prosthesis contributes to optimal gait and overall function of the patient. The current offering of alignment componentry is expensive for low-income countries. The purpose of this study was to develop a lightweight and low-cost...
Nowadays, there are two socket fabrication methods in Thailand, which are resin casting and thermal vacuum method. The thermal vacuum forming method has more advantages than the resin casting method that ruins technicians' health from the volatile matter. Nevertheless, the thermal vacuum forming method can fabricate the socket with poor wall thickn...
The long-term success of Total Hip Arthroplasty (THA) depends largely on how well the prosthetic components fit the bones. The majority of cemented femoral hip prosthesis failures are due to aseptic loosening, which is possibly caused by cracking of the cement mantle. The strength of cement components is a function of cement mantles having adequate...
Background: Many factors cause impingement of the femoral neck and polyethylene liners. Impingements definitely increase the rate of polyethylene wear. This effect has been a major cause of revision hip surgery. Squatting and sitting cross-legged are specific sitting positions typically used by Asian people, including Thai. These types of positions...
To realize an automated and intelligent microassembly process, a method has been developed to monitor the position of the
shaft in the plate of the high-precision spindle motor to reduce the shaft high and the shaft low problems. The shaft low
occurs when the shaft is stuck in the plate lower than the setting tolerance due to the large tolerance of...
A method has been developed to monitor the microassembly process of the shaft into the plate of the high-precision spindle motor. The plate is expanded to reduce the shaft low problem by using the preheating technique at the experimentally simulated temperature. The finite element method is utilized to simulate the expansion of the plate. The force...
Purpose: The aim of this research is to develop an in-process monitoring system to control the position of the shaftwithin a tolerance of ±2.5 μm regardless of any conditions of the geometries of the shaft and the thrust plate.Design/methodology/approach: To realize an automated and intelligent microassembly process, a method hasbeen developed to m...
This paper proposes a methodology to apply a multi-objective optimization to risk-based inservice testing with robustness. The multi-objective optimization is applied to solve the trade-off between maintenance costs and unavailability of a standby system and then assist in determining the robust solution. In order to obtain the most robust solution...
This paper presents a new index to evaluate the sensitivity of the variation in one objective value to the variation in the other in the multi-objective optimization framework. This index is named as Robustness index, RI and is applicable to determine the decision-making point in the multi-objective problem. The decision-making point determined by...
In the recent years, the necessity of flaw evaluation system is increasing with a lot of demands in applicable program that is convenient for users to operate. So it is important to share the technique of flaw evaluation system all over the world and Java is expected to be a very strong tool to achieve this purpose. This paper presents the develope...
Effect of a sequence of abrasive particle sizes for improving the surface roughness of machined surface is studied. Results have shown that an optimum abrasive particle size can reduce the roughness of machined surface to a required minimum. Thus, in order to obtain the most effective polishing result, appropriate sequence of abrasive particle size...