工艺与制造英文2023被引 4
粘接件厚度对CF/LMPAEK热塑性复合材料单搭接近场超声焊接的影响
Effect of Adherend Thickness on Near-Field Ultrasonic Welding of Single-Lap CF/LMPAEK Thermoplastic Composite Joints
Natalia Sofia Guevara-Sotelo, Irene Fernández Villegas · Delft University of Technology
摘要整理
超声焊接是热塑性复合材料零件的快速且前景广阔的连接技术。理解粘接件厚度变化对工艺的影响对其未来的规模化和工业化至关重要。本文初步研究了粘接件厚度对CF/LMPAEK热塑性复合材料近场超声焊接的影响。通过焊接设备输出数据、温度测量和其他表征技术对不同厚度的上下粘接件进行焊接和分析。研究表明，增加上下粘接件厚度均会增加焊接过程中的功率消耗。当上粘接件厚度增加时，焊接过程初期所需功率出现过冲现象，超过4.72 mm的阈值厚度后无法进行焊接。对于较厚的上粘接件，由于整体加热增加，导致能量导向器熔融和上粘接件内纤维提前挤出。根据厚粘接件的振幅读数，推测整体加热增加是由锤击作用增强引起的。采用更高焊接力（已知可降低锤击作用）进行焊接验证了该假设，此时未观察到上粘接件内的纤维挤出现象。研究认为，锤击作用通过产生接近系统固有频率的振荡冲击激励而促进加热，导致循环应变放大，进而增加粘接件内的粘弹性加热。
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