摘要
汽车轻量化是汽车产业实现节能减排的关键任务,新型车身材料的广泛使用在有效降低车身质量的同时,对汽车碰撞安全分析提出了更高的挑战。车用材料在典型碰撞工况下其应变率覆盖从准静态到1000 s^(–1)范围,然而中应变率加载过程诱发振铃效应掩盖了车身材料的真实力学响应。本文依次介绍无激振系统设计、中高应变率杆式系统和单一模态响应的三类传感器技术原理和应用。
To achieve energy saving and emission reduction targets,the automotive industry has been focusing on vehicle light-weighting.Wide applications of novel materials for body-in-white(BIW)structures effectively reduce net weight of car body,and it also poses great challenges to crash safety of vehicles.The vehicle materials under typical crash scenarios cover a broad strain rate range from quasi-static to 1000 s^(–1).Ringing effect in force signals under intermediate strain rate loading causes corruption of actual force responses of the materials used in BIW.This paper presents novel force measurement methods and applications namely oscillation-free compact force sensor,medium-high strain rate bar type force sensor and single-model method force sensor.
作者
邢伯斌
夏勇
应鹏飞
XING Bobin;XIA Yong;YING Pengfei(State Key Laboratory of Automotive Safety and Energy,School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China)
出处
《实验技术与管理》
CAS
北大核心
2023年第4期1-19,共19页
Experimental Technology and Management
关键词
动态测试
应变率
力测量
振铃效应
dynamic loading
strain rate
force measurement
ringing effect
