DUT-1合成模型冰的弯曲强度和弹性模量实验分析

依据渤海海冰物理和力学特征值和国内水池实验室能力,以1:10～1:30比尺要求,发展了DUT-1合成模型冰.文中简介该模型冰的理想参数、成分和制备过程.就其弯曲强度和弹性模量进行系统的实验分析.通过500多次弯曲实验,获得该模型冰在不同加载速度下的破坏方式,各向同性证据和弯曲强度为35～65kPa和弹性模量平均53MPa的结果.并且得到弯曲强度和弹性模量在实测湿密度范围内呈递增关系,浸水模型冰性能稳定时间超过4h,弹性模量与弯曲强度之比82%超过2000.

Experimental analysis of flexural strength and elastic modulus of the DUT-1 model ice

The DUT-1 model ice is a new kind of synthetic model ice.Its characteristics,components and make processed are introduced.From a series of tests,the bending failures under different loading rates were obtained and the anisotropy behavior of the model ice was certified.It was found that its average flexural strength is 45 kPa and its average elastic modulus is 53.24 MPa.The flexural strength and elastic modulus increased with absorbed water amount and wetted density.Both became steady after water absorption 1 hour and kept the steady over 4 hours,which is longer enough for the performing model tests of ice interactions with structures and ice behavior.The ratio of elastic modulus and flexural strength was 82% over 2 000,which indicates that the DUT-1 model ice has the capability for the physical modeling tests in the scale of 1:10~1:30 based on Bohai ice flexural strength of 450~750 kPa.