| 赵亚军,窦远明*.低碳钢应变场与温度场的耦合试验分析[J].实验力学,2018,33(1):134~140 |
| 低碳钢应变场与温度场的耦合试验分析 |
| Coupling experimental analysis of strain field and temperature field of low carbon steel |
| 投稿时间：2017-06-21 修订日期：2017-09-29 |
| DOI：10.7520/1001-4888-17-134 |
| 中文关键词: 数字图像相关 红外辐射温度 耦合分析 颈缩 |
| 英文关键词:digital image correlation infrared radiation temperature coupling analysis necking |
| 基金项目:国家自然科学基金项目(51378169); 河北省交通运输厅项目(Y-2012046)资助 |
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| 中文摘要: |
| 为研究应变场与温度场之间的耦合关系，对低碳钢平板试样开展静态拉伸试验。利用数字图像相关(Digital Image Correlation，DIC)方法与红外热成像(Infrared Thermography，IR)方法获得试样表面位移/应变场和温度场。试验结果表明：在弹性变形阶段，试样表面温度有小幅下降；在塑性变形阶段，应变越大，温度越高，应变场与温度场的变化都呈现相似的局部性；峰值后的颈缩阶段，颈缩部分的应变和温度都出现骤增现象。最大温升与最大应变呈非线性关系，其变化规律分为3个阶段：弹性变形阶段的微小降温、塑性变形阶段的急剧升温和颈缩阶段的平缓升温。 |
| 英文摘要: |
| In order to study the coupling relationship between strain field and temperature field, a static tensile experiment was carried out for plate specimen made of low carbon steel. The displacement/strain field and temperature field on specimen surface were obtained by using digital image correlation (DIC) method and infrared thermography (IRT) method. Experimental results show that on the elastic deformation stage, the temperature on sample surface decreases slightly. On the plastic deformation stage, the greater the strain is, the higher the temperature, the variation of strain field and temperature field presents similar locality. On the necking stage after peak value, the strain and temperature of necking part show a sudden increase. The maximum temperature rise and the maximum strain exhibit nonlinear relation. Its variation can be divided into 3 stages: the temperature decreases on elastic stage, the temperature rises sharply after yielding and rises slightly on necking stage. |
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