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Optimization Design of B-Pillar Based on Concave Triangle Negative Poisson’s Ratio Cellular Structure
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Ying Zhao, Jinyu Shi, Xuanming Liu, Xiaogang Deng, Siqi Zheng
Automobile Technology | 2023, (2) : 1 - 8
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Automobile Technology | 2023, (2): 1-8
Optimization Design of B-Pillar Based on Concave Triangle Negative Poisson’s Ratio Cellular Structure
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Ying Zhao, Jinyu Shi, Xuanming Liu, Xiaogang Deng, Siqi Zheng
Affiliations
  • Southwest University, Chongqing 400715
Published: 2023-02-24 doi: 10.19620/j.cnki.1000-3703.20220626
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To satisfy multiple objective performance requirements of B-pillar, a novel B-pillar with concave triangle Negative Poisson’s Ratio (NPR) cellular structure was designed. Firstly, the relative density equation of novel cellular structure can be derived by employing unit cell method. Then, quasi-static compression test was carried out on 3D printed cellular structure sample to verify the accuracy of finite element model. In addition, Genetic Algorithm (GA) was utilized to obtain the optimal structural parameters with the goals of maximum Specific Energy Absorption (SEA), minimum Peak Collision Force (PCF) and minimum relative density. Based on this, the thickness of B-pillar was optimized with the goal of minimum mass. Through analysis on 3 working conditions, it can be concluded that compared with the non-sandwich carbon fiber B-pillar, the backward bending displacement of the novel B-pillar decreases by 5.28%; compared with non-sandwich carbon fiber B-pillar and carbon fiber B-pillar, the lateral bending displacement of novel B-pillar decreases by 42.28% and 48.05% respectively, the maximum contact force of three-point bending increases by 80.08% and 12.63%, and the three-point bending displacement decreases by 0.02% and 2.14% respectively.

Concave triangle NPR cellular structure  /  B-pillar  /  Carbon fiber composite  /  Polylactic composite  /  Performance analysis
Ying Zhao, Jinyu Shi, Xuanming Liu, Xiaogang Deng, Siqi Zheng. Optimization Design of B-Pillar Based on Concave Triangle Negative Poisson’s Ratio Cellular Structure[J]. Automobile Technology, 2023 , (2) : 1 -8 . DOI: 10.19620/j.cnki.1000-3703.20220626
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doi: 10.19620/j.cnki.1000-3703.20220626
  • Online Date：2025-12-07
  • Published：2023-02-24
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  • Revised：2022-10-25
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    Southwest University, Chongqing 400715
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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