工艺与制造英文2021被引 7
热塑性复合材料感应焊接加热机制的微观级建模
Microscopic level modeling of induction welding heating mechanisms in thermoplastic composites
Darun Barazanchy, Michel van Tooren, Mohammod Ali · University of South Carolina
摘要整理
通过电磁感应加热连续导电纤维增强复合材料的仿真与分析,验证了主导加热过程物理机制的一系列假设。采用ANSYS Maxwell软件在微观尺度研究了碳纤维在交变电磁场中的行为,利用固体损耗量化复合材料中的热生成。为减少单元数量,采用多面体截面而非圆形截面对纤维进行建模,每层纤维建模为20根并排放置的纤维阵列。仿真结果表明,0°/90°纤维取向样品的固体损耗显著高于单一0°取向样品,但两种情况下的损耗均不足以解释实际观测到的加热水平。在纤维体积分数相同的条件下,纤维间隙填充聚合物的样品产生的固体损耗大于无聚合物样品。实验测定了聚合物的导电率,横向电阻值相对较低,表明复合材料中的聚合物不应视为绝缘体。仿真结果表明,热塑性复合材料在交变磁场中的加热主要依赖于通过聚合物的电流。若无聚合物及其导电性,即使电场强度很大也几乎不产生热量。碳纤维需要彼此接近以产生诱导聚合物中电流的电场。加热功率由电流密度平方与聚合物电阻率的乘积决定。
相关论文
A review of recent developments in natural fibre composites and their mechanical performance
Composites Part A Applied Science and Manufacturing · 2015
Non-invasive electrical and magnetic stimulation of the brain, spinal cord, roots and peripheral nerves: Basic principles and procedures for routine clinical and research application. An updated report from an I.F.C.N. Committee
Clinical Neurophysiology · 2015
Lignocellulosic biomass: a sustainable platform for the production of bio-based chemicals and polymers
Polymer Chemistry · 2015
Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints
CIRP Annals · 2016
Nanoimprint Lithography: Methods and Material Requirements
Advanced Materials · 2007
Nanocomposites: synthesis, structure, properties and new application opportunities
Materials Research · 2009
← 返回论文库整理:复材站编辑部