利用数字图像相关技术研究多孔石灰岩力学行为:校准与验证

IF 3.4 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Mohamad Daher, Xavier Brunetaud, Jean Gillibert, Kevin Beck
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引用次数: 0

摘要

凝灰岩是一种松软多孔的建筑石灰岩,用于历史砖石结构中的石块。以往的研究表明,由于测量的尺寸和局部性,使用应变片进行机械监测存在局限性。数字图像相关(DIC)技术已被证明是一种重要的、非接触式和非破坏性的方法,可用于各种材料的全场应变测量,包括天然岩石和异质岩石。在这项工作中,我们对 DIC 参数和校准过程进行了研究,以确定在多孔石灰岩材料上进行机械加载时的最佳配置。由于其对应变测量质量的潜在影响,我们还探讨了几何形状和校正的影响。研究结果提供了一套优化参数,可使 DIC 分析达到最佳效果,同时也强调了整流对此类多孔软石机械行为的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Study of porous limestone mechanical behavior with digital image correlation: calibration and validation

Study of porous limestone mechanical behavior with digital image correlation: calibration and validation

Study of porous limestone mechanical behavior with digital image correlation: calibration and validation

This article deals with the monitoring of strain on tuffeau, a soft and porous building limestone used in stonework in historical masonry. Previous studies have shown the limitations of using strain gauges for mechanical monitoring, due to the size and local nature of the measurement. The digital image correlation (DIC) technique has proved to be a significant, non-contact and non-destructive method for full-field strain measurements of various materials, including rocks which are natural and therefore heterogeneous. In this work, we studied the DIC parameters and calibration process to identify the best configuration for working with a porous limestone material subjected to mechanical loading. Because of its potential impact on the quality of strain measurement, we also explored the effect of geometry and rectification. While the results provide a set of optimized parameters to get the best out of DIC analysis, they also highlight the importance of rectification on the mechanical behavior of such soft, porous stones.

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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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