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基于巴西盘试验的海冰拉伸强度研究

陈晓东 崔海鑫 王安良 季顺迎

陈晓东, 崔海鑫, 王安良, 季顺迎. 基于巴西盘试验的海冰拉伸强度研究[J]. 力学学报, 2020, 52(3): 625-634. doi: 10.6052/0459-1879-20-036
引用本文: 陈晓东, 崔海鑫, 王安良, 季顺迎. 基于巴西盘试验的海冰拉伸强度研究[J]. 力学学报, 2020, 52(3): 625-634. doi: 10.6052/0459-1879-20-036
Chen Xiaodong, Cui Haixin, Wang Anliang, Ji Shunying. EXPERIMENTAL STUDY ON SEA ICE TENSILE STRENGTH BASED ON BRAZILIAN TESTS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 625-634. doi: 10.6052/0459-1879-20-036
Citation: Chen Xiaodong, Cui Haixin, Wang Anliang, Ji Shunying. EXPERIMENTAL STUDY ON SEA ICE TENSILE STRENGTH BASED ON BRAZILIAN TESTS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 625-634. doi: 10.6052/0459-1879-20-036

基于巴西盘试验的海冰拉伸强度研究

doi: 10.6052/0459-1879-20-036
基金项目: 1)国家重点研发计划重点专项(2018YFA0605902, 2016YFC1401505)和国家自然科学基金(51639004, 41576179)资助项目
详细信息
    通讯作者:

    2)季顺迎, 教授, 主要从事寒区海洋工程研究. E-mail: jisy@dlut.edu.cn.

  • 中图分类号: O346.1

EXPERIMENTAL STUDY ON SEA ICE TENSILE STRENGTH BASED ON BRAZILIAN TESTS

  • 摘要: 海冰拉伸强度是其基本力学性能之一, 同时也是冰区船舶与海洋工程结构设计所需的重要参数. 对于脆性材料的拉伸强度测试, 巴西盘劈裂试验相比单轴拉伸试验在试样制备与加载上具有明显的优势. 为研究海冰的拉伸强度特征, 对渤海辽东湾沿岸的粒状冰开展了系统的巴西盘劈裂试验研究. 在加载过程中与试样破坏后, 分别对加载横梁的位移与加载力以及试样最终破坏模式进行了记录. 同时, 对试样的冰晶结构、盐度、温度以及密度进行了测量. 通过改变加载速率、试样厚度与试样温度以研究不同参数对试验结果的影响. 针对传统试验中试样的刚体假设, 考虑了试样变形对应力状态的影响并将其引入了理论模型. 试验过程中所有海冰试样均以劈裂模式破坏. 试验结果表明, 加载速率与试样厚度对拉伸强度的影响并不显著, 但孔隙率的影响较为明显. 当孔隙率由75‰降低至10‰时,拉伸强度由1.0 MPa升高至2.8 MPa. 与单轴拉伸试验所测得数据对比, 巴西盘劈裂试验所得到的拉伸强度随孔隙率的变化趋势相一致. 但该方法所得到的粒状冰拉伸强度要高于预期结果. 试验表明巴西盘劈裂试验中海冰试样的破坏模式与试验结果均较为合理, 可成为海冰拉伸强度的有效测试方法.

     

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  • 收稿日期:  2020-02-13
  • 刊出日期:  2020-06-10

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