冻土断裂韧度测试的理论与方法

冻土断裂韧度测试的理论与方法 English Version

基金项目: 国家自然科学基金资助项目! (No.595780 39) ;;中科院兰州冰川所冻土工程国家重点实验室资助项目! (No .960 1)

State Key Laboratory of Structure Analysis of Industrial Equipment Dalian University of Technology Dalian 116023 State Key Laboratory of Frozen Soil Engineering Lanzhou Institute of

摘要: 在讨论冻土脆性破坏特征的基础上,分析了线弹性适用条件及平面应变断裂韧度测试对试样尺寸的要求。在测试方法上,详细说明了试样的制备,条件载荷值Pq的确定以及实验过程的一些细节问题。最后就冻结黄土KⅠc(Kq)测试结果,分析了KⅠc(Kq)与温度、含水量及加载速率的关系
- 冻土 /
- 断裂韧度 /
- 脆性破坏 /
- 线弹性断裂
Abstract: Based on the discussion properties of brittle failure of frozen soil, requirements on dimension of sample for the definition of fracture toughness under linear elastic and plane strain condition are analyzed in this paper. Testing methods, which include preparation of samples, determination of the conditional load P- q  and other details in the test, are explained in detail. The relations between K-{ Ⅰc }(K- q ) and temperature, water content and loading rate are also analyzed respectively on the basis of the testing result of frozen clay.
- frozen soil /
- fracture toughness /
- brittle failure /
- linear elastic failure