Abstract
The deformation of the members located at front portion of the car caused by the car-accident will influence to the of the crew's room. Then, it is important to grasp the influence of the deformation caused by the outer load. Here, thin-walled polygonal structure is composed for the structure. Then, we induced the deformation-model of thin-walled polygonal member and the analyze the characteristics of deformation by using the image deformation theorem .As the result, many deformation-characteristics of members are obtained.
