玻璃纤维增强乙烯树脂复合材料层合板锥形冲头碰撞试验研究

利用自行设计的摆锤试验装置,对玻璃纤维增强乙烯树脂复合材料层合板结构开展了低速碰撞试验研究。通过对比分析冲击力、试件背面中心点位移以及采用超声C扫描定损技术,对复合材料层合板的损伤特性进行了详细分析。试验表明,在一定碰撞能量下复合材料层合板受冲击面出现明显损伤,同时伴随着内部大范围的分层损伤现象的发生;随着碰撞能量的增加,层合板受冲击面损伤程度随之增加,背冲击面也由无明显损伤到出现基体开裂和纤维断裂的现象变化;层合板内部分层的面积与其吸收的能量有关。

Experimental study on impact damage of glass fiber reinforced vinyl resin composite laminates

The low speed impact test of glass fiber reinforced vinyl resin composite laminated plate is studied by using a self-designed pendulum test device. Through the comparative analysis of the impact force, the back center displacement of the specimen and the use of ultrasonic C scanning technology, the damage characteristics of composite laminates areana-lyzed in detail. The impact surface of composite laminates with a certain impact is obviously damaged, and it isaccompan-ied by a large range of delamination damage in the interior. With the increase of the collision energy, the damage degree of the laminate is increased, and the back surface is changed by the phenomenon of matrix cracking and fiber breakage. And the area of the delamination of the laminate is related to the energy absorbed by the laminate.