التفاصيل البيبلوغرافية
| العنوان: |
碳纤维增强树脂基复合材料层合板 胶螺混合连接失效机制. (Chinese) |
| Alternate Title: |
Failure mechanism of carbon fiber reinforced polymer bonded-bolted hybrid connection. (English) |
| المؤلفون: |
刘礼平, 段科好, 徐卓, 冯振宇, 蔺越国, 郑亦媚, 宋肖肖 |
| المصدر: |
Acta Materiae Compositae Sinica; Jan2023, Vol. 40 Issue 1, p590-600, 11p |
| Abstract (English): |
In order to study the failure mechanism of the single-lap two-bolt bonded-bolted hybrid connection of carbon fiber reinforced polymer (CFRP) laminates, the continuous progressive degradation method based on fracture energy fracture criterion was used to simulate the stiffness degradation of CFRP laminates, and the B-K criterion based on energy was used to simulate the damage evolution of the adhesive layer. A three-dimensional finite element model of progressive damage of the bonded-bolted hybrid connection structure was established. The maximum failure load predicted by the finite element model is in good agreement with the experimental results. Lap length La is an important geometric parameter affecting the stiffness and strength of the bonded-bolted hybrid joint. The position of bolt will not significantly affect the stiffness of joint. The larger the bonding area, the greater the strength. Under the action of tensile load, the bolt of the bonded-bolted hybrid joint is inclined to the left due to the influence of the secondary bending effect. The adhesive layer damage in the overlap area starts from the outside of the adhesive layer in the overlap area and expands from the outside to the inside to the vicinity of the bolt hole. When the damage of the adhesive layer extends to the vicinity of the bolt hole, the load of the bolt increases, and the adhesive layer and the bolt bear the load together. At this time, the CFRP laminates begin to damage, and the upper composite plate at the left hole and the lower composite plate at the right hole produce delamination damage and fracture. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
为研究碳纤维增强树脂基复合材料 (CFRP) 层合板单搭接双螺栓胶螺混合连接失效机制, 采用基于 断裂能断裂准则的连续渐进退化方式, 仿真 CFRP 层合板刚度退化, 采用基于能量的 B-K 准则仿真胶层的损 伤演化, 建立胶螺混合连接结构渐进损伤三维有限元模型, 有限元模型预测的最大失效载荷与实验结果吻合 较好. 搭接长度 La 为影响胶螺混合接头刚度和强度的重要几何参数, 螺栓的位置不会明显影响接头的刚度, 粘结面积越大, 强度越大. 胶螺混合接头在拉伸载荷作用下, 由于二次弯曲效应的影响, 螺栓向左倾斜, 搭 接区域的胶层损伤起始于搭接区域胶层外侧, 并由外侧向内部扩展到钉孔附近, 当胶层损伤扩展到钉孔附近 时, 螺栓承载增加, 胶层和螺栓共同承载, 此时 CFRP 层合板开始出现损伤；最终, 左侧钉孔处的上层合板 和右侧钉孔处的下层合板产生分层损伤并发生断裂. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
