南京工业大学学报（自然科学版）2016，Vol.38Issue(5)：100-104,110,6.DOI:10.3969/j.issn.1671-7627.2016.05.016
基于 VIC 3D 技术的重组竹I 型断裂参数确定方法
Determination of mode-I fracture parameters of parallel strand bamboo based on VIC-3D technology
摘要
Abstract
Fabricated via industrial process using raw bamboo,Parallel strand bamboo (PSB)is a high strength composite which has been used in building constructions in recent years.Microvoids are inevitably left in PSB composite owing to the dimensional inconsistence of bamboo fibers;hence fracture due to mocrovids coalescence and expanding maybe a major failure mode of PSB components.This paper amid at studying on the Mode I fracture properties based on LEFM theory and Iwrin’s energy theory. Wedge splitting test was employed as test method.The length of crack expending was determined by three dimensional virtual image correlation (VIC-3D)global-field deformation acquisition system.Fracture toughness of PSB and R-curves were obtained.The results showed that the VIC-3D global-field acquisition system can precisely determine the crack tip and the complicated calculation for crack length determination may be avoided.Good agreement may be achieved between the result of this method and compliance approach,which indicated that the proposed method in this study is efficient.关键词
重组竹/I型断裂/VIC3D技术/R曲线Key words
parallel strand bamboo/mode I fracture/VIC-3D technology/R-curve分类
建筑与水利引用本文复制引用
杨蕾,周爱萍,黄东升,何晨..基于 VIC 3D 技术的重组竹I 型断裂参数确定方法[J].南京工业大学学报（自然科学版）,2016,38(5):100-104,110,6.基金项目
国家自然科学基金（51578291）；林业科学技术成果国家级推广项目；江苏省高校优势学科建设工程 （）
