Evaluation of in-situ shrinkage and expansion properties of polymer composite materials for adhesive anchor systems by a novel approach based on digital image correlation

被引：28
|
作者：
Singer, Gerald [1 ,2 ]
Sinn, Gerhard [2 ]
Lichtenegger, Helga C. [2 ]
Veigel, Stefan [3 ]
Zecchini, Michele [1 ]
Wan-Wendner, Roman [1 ,4 ]
机构：
[1] Univ Nat Resources & Life Sci Vienna, Inst Struct Engn, Christian Doppler Lab LiCRoFast, Peter Jordan Str 82, A-1190 Vienna, Austria
[2] Univ Nat Resources & Life Sci Vienna, Inst Phys & Mat Sci, Peter Jordan Str 82, A-1190 Vienna, Austria
[3] Univ Nat Resources & Life Sci Vienna, Inst Wood Technol & Renewable Mat, Konrad Lorenz Str 24, A-3430 Tulln An Der Donau, Austria
[4] Univ Ghent, Dept Struct Engn, Ghent, Belgium
来源：
POLYMER TESTING | 2019年 / 79卷
基金：
奥地利科学基金会;
关键词：
Chemical shrinkage; Thermal expansion; Digital image correlation (DIC); Polymer-matrix composites (PMC); Adhesive anchor; CURE SHRINKAGE; MECHANICAL-PROPERTIES; RESIN; PREDICTION;
D O I：
10.1016/j.polymertesting.2019.106035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The curing reaction of thermosetting resins is associated with chemical shrinkage which is overlapped with thermal expansion as a result of the exothermal enthalpy. Final material properties of the polymer are determined by this critical process. For adhesive anchor systems the overall shrinkage behavior of the material is very important for the ultimate bond behavior between adhesive and the borehole wall. An approach for the in-situ measurement of 3-dimensional shrinkage and thermal expansion with digital image correlation (DIC) is presented, overcoming the common limitation of DIC to solids. Two polymer-based anchor systems (filled epoxy, vinylester) were investigated and models were developed, showing good agreement with experimental results. Additionally, measurements with differential scanning calorimetry (DSC) provided supporting information about the curing reaction. The vinylester system showed higher shrinkage but much faster reaction compared to the investigated epoxy.
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页数：8
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