Applications of Digital Correlation Method to Structure Inspection |
| |
Authors: | Junda Chen, ࿊ ྾ , Guanchang Jin,
,Libo Meng, ¿ Î |
| |
Affiliation: | Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
| |
Abstract: | In structure inspections, applications of optical techniques are rare, but the advantages of a non-contact, full field technique using a simple apparatus are attractive. The main requirements for structure in- spection are the full-field strain measurement with the required precision and on-site measurement ability. The digital correlation method (DCM), a new optical deformation measurement tool, can satisfy all of the re-quirements for structure inspection. A smoothing algorithm which can greatly improve the strain measure-ment precision, and a 3-D DCM have been developed in this paper. For verifying this improvement, a com-parison of strain measurements by computer-simulated speckle images has been carried out. Additionally, three structure inspection examples that cover typical materials and structure styles are presented: the inter-face shear stress distribution for reinforced concrete piles bedded on rock, the 3-D strain distribution of a composite vessel structure, and stresses in a hookup that connects two steel bridge structures. All the ex- amples show that the new structural inspection tool is exemplary and illustrates the obvious advantages of this optical non-destructive technique. |
| |
Keywords: | structure inspection optical non-destructive technique digital correlation method (DCM) 3-D strain measurements |
本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录! |
|