จำนวน Repository ( 9 )
การวิเคราะห์ความเข้มของความเค้นและการเสียรูปของล้อยางรันแฟลทสําหรับรถยนต์นั่งส่วนบุคคลโดยใช้วิธีไฟไนต์เอลิเมนต์
The research aimed to study parameters affecting the stress intensity and stress distribution as well as the deformation of run-flat tires for passenger cars using the Finite element method. Both experimental methods and finite element methodologies were employed in the research process. The results were obtained by comparing the strain values from the two methods to demonstrate the consistency of both methods. The differences in their strain values were shown in the range of 10-16% confirming the analyzing capability in this problem through the Finite element method. At the pre-processing step both procedures and methods were proven with SolidWorks simulation program together with experimentation. These consequences were incorporated to assist the design of run-flat tires. Parameters affecting the stress intensity and stress distribution were evaluated to understand the effects on deformation of the new designed run-flat tires. The reverse engineering process was thus applied in the research process by scanning with FARO P06-05 and creating solid modeling 3D models with Geomagic program for SolidWorks. These could assist in designing the reverse- engineered tire pan. Three components were additionally designed to support the ease in assembling or removing run flat tires from the pan. Run flat tires were finally designed for passenger cars typically the most common small cars. The weight of this car was limited at not more than 1800 kg and the thickness of the wheel pan was 17 inches. The analysis information assumed that the vehicles weight was distributed equally throughout all 4 wheels. The material used to make the run flat tires was a composite tire type that could withstand the pressure occurring from the weight of a passenger car. The results of the analysis demonstrated that the maximum stress on the run flat especially at the position where the run flat surface was in contact with the road was 30-45 MPa which depends on the location of contact with the road. Thus it affected the stress distribution on the wheel pan. The parameters obtained from the study affecting the stress distribution and deformation were accounted to be such types of materials made for run flat tires cross-sectional area and width of run flat tires.
การสร้างหลักสูตรผู้สูงอายุวัยหลังเกษียณ : กรณีศึกษา มหาวิทยาลัยเทคโนโลยีราชมงคล จังหวัดกรุงเทพมหานคร
This study a knowledge formation research had objections to study (1) the basic information about the demand in occupational training by the retired of Rajamangala University of Technology in Bangkok and its vicinity and (2) the occupational training curriculum for the retired. The elderly that retired for Fiscal Year B.E. 2555 be affiliated with Rajamangala University of Technology in Bangkok and its vicinity such as Rajamangala University of Technology Thanyaburi Rajamangala University of Technology Krungthep Rajamangala University of Technology Tawan-ok Rajamangala University of Technology Phra Nakhon Rajamangala University of Technology Rattanakosin and Rajamangala University of Technology Suvarnabhumi Nontraburi Center were the population of this research. Sample consisted of 65. A questionnaire was used to collect data and statistical software was used to compute the percentage. The experimental results showed that the most of the respondents were not self- employed after retirement (9.385 %) but they wanted to be self- employed (69.25 %). The aims of training were adding new experience real-life applications and self- employment respectively. The training courses which the retired needed were “Dim sums” “Cookies” and “Thai crafts” respectively. The most of subjects wanted to make field trips at the interesting business (58.33 %) and take training courses about E-commerce (31.25 %) and marketing knowledge (10.41 %). The training courses would operate four days between 8.30 am and 16.30 pm and take three days for training activities and one day for field trip. Training locations were the faculty of Home Economics Technology Rajamangala University of Technology Phra Nakhon and the business respectively. For expense factors it would charge the cost of materials but not training fee. For the factors promoting to achievement the most of respondents wanted to have the distributors (39.85 %) the source of investment funds (22.91 %) and the counseling agencies (10.41 %). The retired of six universities were interested in 3 occupational training courses namely the culinary job training courses for “Dim sums” “Cookies” and “Flower works and Banana Leaf Crafting for business” respectively. The complete training curriculum was organized by developing structures and elements of the training curriculum which comprised principles objectives aims duration structures explanation of each subject training guidelines devices result measurement and evaluation model and curriculum application guidelines.
การพัฒนาลวดลายพิมพ์จากศิลปะอาร์ตนูโวบผ้าใยกัญชง เพื่อออกแบบชุดทำงานสตรี
The objectives of this research are 1) to develop the printing pattern from Art Nouveau on hemp fabric by way of screen printing 2) to design the womanfs working attires by using hemp fabrics for printing the pattern from Art Nouveau 3) to study the satisfactions of samples who are women in working age in Bangkok Metropolitan area: Sat horn and Bangkok toward the womanfs working attires with Art Nouveau pattern printed on hemp fabrics. The sampling group is women in working age ranging from 25 to 35 years in Sat horn and Bangruk Areas Bangkok Metropolis in number of 384 persons. Instruments used are Questionnaires and womanfs working attire prototype in number of 9 models. Data analysis statistics are percentage mean and standard deviation. Actions are carried out by studying the concept of Art Nouveau in order to design the printing patterns in 3 designs consisting of butterfly design flower design and creeper design for screening on hemp fabrics and tailoring them into womanfs working attires in the style of dress jacket and skirt of 9 models.
The Improvement Of Carbon Black From Waste Tires For Offset Printing Ink Using Coupling Agent
This work was aimed to improve the carbon black from waste tires for printing ink using coupling agent to disperse carbon black particle for making an oil-based offset ink. This experiment used 2 coupling agent these were silane coupling and derivative fatty acid and used to produce offset inks for the 7 formulas. Formula 1 Commercail carbon blackFormula 2 carbon black was not washed by Nitric acid formula 3 carbon black was not washed by Nitric acid and was added silane coupling agent formula 4 carbon black was not washed by Nitric acid and was added fatty acid modified emulsifier formula 5 carbon black was washed by nitric acid formula 6 carbon black was washed by nitric acid and was added silane coupling formula 7 carbon black was washed by nitric acid and was added fatty acid modified emulsifier. Bring all 6 formulas to test property to compare with offset ink commercial. First find the smallest particle of carbon black for 90 minutes. It was found that formula 4 took 20 minutes to make particles 12 micron and it is smalles particle of all. Then measured ink flow by Spread-O-Meter and measured diameter after 1 minute. It was found that formula 3 and 3 were 77 mm. and approximate commercial ink. Then measured tack of ink with Ink-O-Meter it was found that formula 2 3 4 6 and 7 were 2.4 and formula 5 was 2. Then measured viscosity and yield value of ink by Lary viscometer. It was found that formula 2 had 77 poise of ink viscosity and 670 dyne.s/cm2 of ink yield value that was approximate commercial ink. Finally measured Emulsification capacity (%) by Kershaw Water Pick up Tester. It was found that formula 6 had 74% and it was approximate commercial ink.
การออกแบบล้อรันแฟลทสำหรับรถยนต์นั่งส่วนบุคคลด้วยระเบียบวิธีไฟไนต์เอลิเมนต์
The objective of this research was to design run flat wheels made of aluminum for passenger cars and investigate the stress strain and deformation of run flat wheels and their components. The original 17 inch run flat wheels were made of AISI 1020 steel with a weight of 11.3 kg per wheel. The main problems were from the high-level weight as well as the untighten connection together with noticed gaps taking place between the run flat wheel and the wheel. Therefore in this study the AISI 1020 material was changed to the Aluminum 6063 T6 material. The Numerical methodology using the finite element program was also chosen to indicate the comparative differences in the strain values engaged at various locations of both run flat wheels and pan wheels. The results obtained from both approaches using SolidWorks Simulation Program uncovered the consistent results of the experiments with a 10-16% difference in strain values. The complicated 17 inch wheel pan model was next built using reverse engineering and employed as a key reference to design the cross-sectional area of the new run flat wheels made of Aluminum 6063 T6. All these two parts could be connected tightly. The SolidWorks Simulation program was employed to design and examine the strength of both designed aluminum run flat wheels made of aluminum and the wheel pan made of 17 inch aluminum alloy to build passenger cars. The finite element model was furthermore applied for the run flat wheels made of aluminum 6063 T6 and it provided run flat wheels composed of 2 light weighted pieces. The stress strain and deformation measured were proven and suggested in the test. The output Von Mises stress did not exceed the Yield stress within the linear elastic limit and 3 times safety integrity value. The results from the study were that the obtained run flat wheels allowed the driver to continuously drive for a further 50 kilometers at a speed of 50 kilometers per hour without losing control. They allowed possible tire repairing or replacing when situated in a safe and convenient location.