Nowadays an automotive industry steadily has been growing and playing a major role on economy development for many years. The crash box is one of the most important parts for safety but it was found that the crash boxes manufactured domestically are not met international standard requirements. This is due to process and material limitation. This process for automotive safety test requires high budget and there is unclear approach for specific test. Therefore a study of crash boxes referred to energy absorption project was conducted as the alternative materials for product. Consequently this project was aimed to design and test crash boxes which made from the diversity of the alternative materials such as aluminum aluminum reinforced by foam resin reinforced by fiberglass resin reinforced by water hyacinth and resin reinforced by water hyacinth and husk. In addition it was also emphasized in studying energy absorption behavior and physical deformation of crash boxes after dynamic and static energy being applied. The experimental works were applied for these tests in partly referenced to US NCAP and ECE R29 standard for automobile collision test. Testing all types of crash boxes indicated that the aluminum reinforced by foam type was able to absorb energy at 189 MJ/m3. It is higher than resin reinforced by water hyacinth and husk at 1 MJ/m3 as 188 times. Furthermore the comparison of the energy absorption (per unit volume) between the aluminum reinforced by foam type and the steel type from the previous project equivalent 20 MJ/m3 found that it is 8.45 times of difference. While the front impact test was not successful because the size of crash boxes was not suitable for the energy volume. It was a cause for non-available calculation of energy absorption value.

Braking system is the main of safety for motor vehicle. It uses to slow down or stop of vehicle movement. Normally braking system can not to adjustable in the recently. The brake efficiency depends up on to 3 factors by the perfection of brake equipment friction coefficient of road surface and the brake proportional. The factor of the perfection of brake equipment and friction coefficient of road surface can not be control. But in case of the brake proportional can be set up to suitable. In the other hand if the brake ratio is unsuitable the driver may be risk to danger from the loss of vehicle control. From this reason the aim of project is to study of the brake proportional affected to vehicle control. By the test condition consist of 2 cases: braking performance testing and vehicle stability testing. In case of braking performance testing is consider to deceleration braking distance and time of braking. For the vehicle stability testing is determined with yaw angle pitch angle sideslip angle and wheel lock up condition. However the bolt of testing is the road test and using the FMCSA standard for the testing guideline. The result of the braking performance testing shown the maximum deceleration was appeared on brake proportional 80:20. But the braking distance and time of braking are least because of the non-continuously of deceleration from the driver. Therefore the braking distance and time of braking depend on the continuously of deceleration. In term of vehicle stability testing discovered to the each of brake proportional are risk to danger for the driver especially on the 100:0 because of the value of sideslip angle is more than the critical point and the rear axle is lock up.

The objective of research was to study and analysis the Electric vehicle structure of Rajamangala University of Technology Phra Nakhon. The Electric vehicle designed to save energy protect environment and cognitive development of student by used the computer software help in the design Material selection Finite Element Analysis Appropriability of the Electric Vehicle Structure and di s p l a c e m e n t of the vehicle structure by using the computer program help in the calculation for the Finite Element Method including to the development of engineering skill. The research must to create the Electric vehicle prototype to suitable and the structure have lightweight and strong for the electric vehicle and focuses on energy efficiency and the material of structure used steel pipe. This research can use to other working structure and future vehicle in sustainable. The vehicle has two seats Capable of running speed to 0-80 km/h the weight at the vehicle structure not over 1 0 0 kg. And the material of structure used steel pipe. This researching can use to other working structure and future vehicle in the sustainable.

This research aimed to study the design and development to assist in bringing the car seat into the production process and the risk assessment approach to ergonomics to suit operator. Emphasizing the importance of work and trying to create design tools. Organize work appropriately in accordance with the competency and performance of each individual. Using the principles of biomechanics analysis applied in the analysis along with an assessment of the risks by taking into consideration upon 3 factors. 1. The level of severity. 2. The level of frequency.3. Safety measures at the different parts of the body due to which the body must be borne from the outside and in the work. By bringing knowledge of mechanics the proportion of the body anatomy and physiology is able to create the relationship in a model way of Ergonomics which occurs according to the gesture. The use of tools lifting heavy parts and labor pull push and press researchers found in the process of lifting car seat weighs 14.5 kg dimensions width 45 cm length 55 cm and 100 cm in height is the distance of the car seat to shelve. Assembly point distance of 200 cm research has fixed this issue by adjusting the distance of the car seat and shelves by only 50 cm distance can be reduced down to 150 cm and adjust the position of the lifting cushion to reduce twisting torso while assess the biomechanics model of the behavior of all employee in improvement on quality both before and after work station.

This research aims to compare the mechanical properties of materials made from hyacinth pineapple and sugarcane fibers and also to study the feasibility of producing automotive interior parts from natural fibers. The 9 specimens that made from natural fiber such as water hyacinth pineapple leaf fiber sugar can and husk and there are also three different binders: glue polymer and polymer plus hardener were produced. All of specimens were controlled mass and density. The specimens were classified into 2 types: 1) thin type with a size of 3.5x14x1 cm in order to test the flexibility 2) thick type with a size of 6.5x6.5x20 cm for testing the ability to absorb energy. The test results showed that the specimen produced from sugar cane and husk using adhesive bonding able to receive bending stress and modulus of elasticity more than other specimens up to 80.63% and 69.19% respectively. While the ability to absorb energy from work piece made from pineapple leaf fiber and husks using polymer bender was able to absorb energy more than other work pieces 51.58%.