Title Experimental research on the compressive fracture toughness of wing fracture of frozen soil
Author Liu Xiaozhou; Liu Peng
Author Affil Liu Xiaozhou, Chinese Academy of Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou, China. Other: Dalian University, China
Source Cold Regions Science and Technology, 65(3), p.421-428, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date Mar. 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309956
Index Terms damage; experimentation; fracturing; frozen ground; frozen ground compression; frozen ground mechanics; loading; mechanical properties; soil mechanics; China--Shenyang; Asia; China; compression; experimental studies; Far East; fractures; Shenyang China
Abstract It is commonly found that not only bending fracture but also compressive fracture occur frequently in compression, furthermore, in some specific conditions, compressive fracture sometimes has dominant effect on frozen soil. Therefore, it is extremely necessary to study the mechanical characteristics of the compressive fracture of frozen soil and to investigate the damage and fracture mechanism of frozen soil based on the previous research on frozen soil damage in compression. This study draws on the ideas and methods used in compression fracture research on ice that is very similar to frozen soil, and specific clay in Shenyang region was adopted as the experimental material, to make compressive specimens containing tilted wing crack of different angles, and uniaxial unconfined compression fracture experiments were conducted at different temperatures and loading rates. The fracture toughness KIC and KIIC of the main crack tip of the specimens are calculated with obtained experimental results and the law of KIC and KIIC changing with tilted angles, temperatures and loading rate is obtained to gain an insight to damage mechanism of frozen soil in compression. This paper presents a meaningful attempt for the research on compressive fracture of frozen soil, so as to better solve practical engineering problems.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.11.006
Publication Type journal article
Record ID 65006896