| 摘要 |
PROBLEM TO BE SOLVED: To effectively reinforce a vehicle body member made of a steel plate such as a vehicle pillar while minimizing an increase in weight.SOLUTION: In a vehicle body manufacturing method, a pillar 25 is manufactured after identifying a stress concentration section 49 where bending stress concentrates when a load is applied to the pillar 25 made of a steel plate. Then, a patch 45 made of CFRP is put on a tensile surface of the stress concentration section 49. Thus, the vehicle body manufacturing method can maximize a reinforcement effect while minimizing an increase in weight by reinforcing only the stress concentration section 49 of the pillar 25 with the light weight CFRP patch 45. In addition, because the CFRP patch 45 has higher resistance against a tensile load than a compressive load, the vehicle body manufacturing method can not only further improve the reinforcement effect by putting or bolting the CFRP patch 45 on the tensile surface of the stress concentration section 49 but also easily adjust an effectiveness level of reinforcement by simply changing the number of layers of carbon fibers of the CFRP patch 45 or a fiber orientation direction thereof. |
