摘要
通过万能试验机对尼龙6(PA6)试件进行单轴拉伸实验,同时用红外热像仪测试试件在拉伸变形过程中表面的温度场变化。在10mm/min、20mm/min、50mm/min三种加载速率下分析PA6颈缩形成阶段与发展阶段的应力与应变,最大红外辐射温度与时间和塑性功之间的关系。结果表明:加载速率越大,颈缩形成阶段红外辐射温度增幅越高,颈缩发展阶段的温度变化越大,塑性功转化为红外辐射能的速率越快。
By using an universal testing machine to stretch PA6,the temperature distribution on the surfaces of specimens were monitored by a thermal infrared radiation detector.The relationships between the stress and strain,the maximum infrared radiation temperature and time,and the maximum infrared radiation temperature and plastic work were analyzed under three different loading speeds,10mm/min,20mm/min and 50mm/min.The experimental results show that the maximum temperature amplification of specimen surface during necking and neck propagation positively increased with increasing loading speed,and the speed of transforming plastic work partly into heat increased with increasing the loading speed too.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2010年第4期609-612,共4页
Journal of Materials Science and Engineering
基金
湖南省教育厅资助项目(07A071
09C951)
湘潭大学资助项目(08XZX28)
关键词
PA6
颈缩行为
力学性能
红外辐射温度
PA6
necking behavior
mechanical properties
infrared radiation temperature
