Nowadays the automotive industry in Thailand has been widely growing. Brake pad is one of the automotive products that play a vital role in automotive industry because it is the most critical seeurity part. Consequently testing products for quality are extremely requested. However the precise equipment and function tests which show the real effects are not available enough and cost a lot. Therefore they cannot response to the deman in the automotive industry development. In this study the frictional test jigs for friction measurement JIS K7125 [5] and the clutch facings for automobiles JIS D4311 [6]. A study of the frictional test emphasizes on the static friction (μs) and kinetic friction (μk) in different condition. There are 3 specimens of brake pad supposted by the industry company. These specimens were tested and the results from the pin-ondisk and those from the friction testing were compared. The results revealed the correspondence of the two-sided results but the pin-on-disk’s friction coefficient is more than the friction testing’s friction coefficient by 19.56%. Moreover the coefficient of friction varies according to the temperature Besides the static friction (μs) is likely more than kinetic friction (μk) and tends to differ considerably under high pressure condition.

The purpose of this research was to construct the rotating bending fatigue testing machine for metal material to find out the built-in machine performance and compare it with machines that meet international standards. The machine built into a compact machine using weight knob for a heavy load in testing. It can test the force range 50-300 Newton (N) the motor is a 1 HP transmitter with a speed of 2800 rpm. Start by pressing the Start button to release the weight that sends power to the workpiece and attend a sensor counting is available to detect the lack of testing material. For the efficiency performance of the machine uses 10 piece steel shafts diameter of 8 mm according to the standard of the material fatigue tester by independent end bend rotation. For testing to compare with the test international standard machine also uses 10 piece steel shafts using force 150 N. For the analysis to test statistical hypotheses with the Minitab computer program at the significance level of 0.05 it was found that the values obtained from be made the rotating bending fatigue testing machine for metal material there is no difference with standard machines from statistically significant. All values are within the set limits. In conclusion the machine was created to be as effective as the international standard machine.

The purpose of this research is to find the relation between stress and strain called as the Flow Stress Curve for 0.4 mm thickness stainless steel (SS 304). Two main methods are used: the Uniaxial tensile test and the Hydraulic Bulge Test (HBT). The relation between stress and strain from both methods would then be compared and simulated into cubic-shaped models by using Finite Element method. Results show that sheet metal formation simulated by using the flow stress curve obtained from Hydraulic bulge test can have the height of up to 40 millimeters before the work piece starts to lacerate. On the other hand if the flow stress curve obtained from Uniaxial tensile test is used the work piece will only be able to form about 15 millimeters before lacerating. The preliminary summary for this research can be said that the analysis for Hydraulic bulge test gives better results than Uniaxial tensile test as it has similar conditions to the actual formation process.

The purposes of this research were :1) to construct the achievement test in The Development of Principles of Food and Nutrition Test for Home Economics Technology of Rajamangala University of Technology Students 2) to assess the quality of test in the aspects of validity item discrimination item difficulty and reliability Research and Development; R&D was used for research method. There were 4 step as follows: 1) Research to study the basic data and need of achievement test construction 2) Development to construct the achievement test 3) Implementation to tryout the achievement test and 4) Evaluation to assess and revise the achievement test after that bring to create the normalize of achievement test sample of Food and Nutrition Test for Home Economics Technology of Rajamangala University of Technology Students enrolled suubjects Principles of Food and Nutrition Acedemic Years 2559 on 30 peoples. Tools for use in researching the achievement in Principles of Food and Nutrition kinds 4 choices 100 items. The findings were as follow: 1.The development of achievement test in Principles of Food and Nutrition for Home Economics Technology major of Food and Nutrition which constructed 100 items results revealed that the test gained content validity value index balance during 0.67-1.00 2.Quality of achievement test in Principles of Food and Nutrition for Home Economics Technology major of Food and Nutrition. Achievement test Principles of Food they also have the difficulty (P-value) of 0.15-0.80 and the discrimination (R-value) of 0.20-0.80 and reliability of 0.20. The normalize T-score was T46.39-84.26 achievement test Nutrition they also have the difficulty (P-value) of 0.15-0.80 80 and the discrimination (R-value) of 0.20-0.80 and reliability of 0.20. The normalize T-score was T46.39-84.26 T48.00-80.89