摘要
基于某车型的整体侧面碰撞有限元模型建立了车身侧面碰撞简化模型,并验证了二者的一致性。构建了AA7075 Johnson-Cook塑性阶段材料本构模型,将AA7075材料用于B柱内板和加强板,并与原模型进行了抗撞性对比分析。改进了加强板的结构,建立了近似模型并对其进行了厚度优化。结果表明,AA7075 B柱板件在有效降低侵入速度峰值和最大侵入位移的条件下质量减轻了60%,轻量化效果明显。
A simplified side impact model was established based on the entire side collision FE model of a vehicle model, and consistency of these two models was verified. AA7075 Johnson-cook plastic constitutive model was built, and material AA7075 was used on inner panel and stiffening plate of B pillar, and its crashworthiness was compared with the original model for analysis. The structure of the stiffening plate was improved, and an approximation model was constructed and its thickness was optimized. The results showed that AA7075 B pillar could effectively reduce the maximum intrusion speed and displacement whereas decreases the mass by 60 %, which showed an obvious lightweight effect.
出处
《汽车技术》
北大核心
2016年第10期1-6,共6页
Automobile Technology
基金
国家自然科学基金项目(51075178)
关键词
侧面碰撞
B柱
AA7075
抗撞性
轻量化
Side impact
B pillar
Aluminum alloy 7075
Crashworthiness
Lightweight
