مدل سازی عددی رفتار لغزش تنش برشی چسبندگی کامپوزیت های فولادی/CFRP
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مدل سازی عددی رفتار لغزش تنش برشی چسبندگی کامپوزیت های فولادی/CFRP

عنوان فارسی مقاله: مدل سازی عددی رفتار لغزش تنش برشی چسبندگی کامپوزیت های فولادی/CFRP که در دمای بالا مورد آزمایش و عمل آوری قرار گرفته اند
عنوان انگلیسی مقاله: Numerical modelling of bond shear stress slip behavior of CFRP/steel composites cured and tested at elevated temperature
مجله/کنفرانس: ساختارهای کامپوزیتی - Composite Structures
رشته های تحصیلی مرتبط: مهندسی عمران، مهندسی مواد
گرایش های تحصیلی مرتبط: مهندسی مواد مرکب، سازه، زلزله
کلمات کلیدی فارسی: لغزش تنش چسبندگی، CFRP/فولاد، خصوصیات خط پیوند، عمل آوری، افزایش درجه حرارت
کلمات کلیدی انگلیسی: Bond stress-slip، CFRP/steel، Bond line properties، Curing type، Elevated temperature
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus - Master Journals List - JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.compstruct.2019.01.002
دانشگاه: Department of Civil Engineering, University of Moratuwa, Sri Lanka
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 5/306 در سال 2018
شاخص H_index: 130 در سال 2019
شاخص SJR: 1/967 در سال 2018
شناسه ISSN: 0263-8223
شاخص Quartile (چارک): Q1 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 17
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E11537
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


1- Introduction


2- Overview of the test programme


3- Numerical modelling


4- Transient heat analysis


5- Thermo-mechanical analysis


6- Parametric study


7- Conclusions


References

نمونه متن انگلیسی مقاله

Abstract


This paper presents a numerical model developed to predict the bond characteristics of CFRP/steel composites cured under different curing conditions and their behaviour at elevated temperatures. The measured material properties and their degradation with the temperature exposure were considered. The predicted bond performance was in a good agreement with the test results. The strain variation in the CFRP sheet was used to develop the bond shear stress-slip variations. Parametric studies were also conducted to evaluate the effects of bond line parameters on the bond shear stress-slip relationship at elevated temperature. The results indicate that the maximum bond shear stress of the joint lies in the range between 25 MPa and 28 MPa at ambient conditions, irrespective of the curing type. A rapid decrease in the maximum bond shear stress appears with exposure to the elevated temperature. Maximum shear stress reaches 10 MPa when the bond line temperature exceeds 90 °C. The elevated temperature curing, exposed temperature during service and the bond thickness notably affects on the bond slip behavior.


Introduction


Superior mechanical and thermal properties of Carbon Fiber Reinforced Polymer (CFRP) material has attracted the attention of the civil and construction industry. The use of elevated temperature curing conditions may improve the performance of CFRP strengthened structural members [1]. In this case, it is vital to understand the bond mechanism of the system cured under different curing conditions and their behavior at elevated temperatures. Nguyen et al. [2,3] has observed the effects of curing conditions at ambient temperature and also the behaviour of ambient temperature cured joints at elevated temperature. They found a significant degradation of bond properties with the temperature exposure of the bond between CFRP and steel, cured under ambient conditions. Gamage et al. [4] also noted the similar behavior from CFRP/concrete composites cured at ambient conditions. Some research studies conducted on the CFRP/concrete joints indicated the negative influence on the substrate properties from elevated temperature curing [5-7]. However, these studies were conducted in a controlled environment. The curing was also done using a standard which are not practically feasible in civil engineering applications [3,8-10]. Chandrathilaka et al. [11] introduced a set of halogen floodlights for elevated temperature curing of the CFRP/epoxy/steel bond. They have exaggerated the feasibility of this system for the application in curing of large structures with high performance. Bond shear stress-slip variation is one of the key parameters which determines the bond behavior, irrespective from the geometrical properties of CFRP/steel composite. However, there is a lack of knowledge on the steel/CFRP bond slip behavior if it is both cured and exposed to elevated temperature. In general, collecting all required data from experiments is impractical and also not economical. In such cases, Finite Element Analysis (FEA) can be applied to predict the performance. Many researches have successfully applied FEA technology to predict the behavior of CFRP/steel composites [12,13]. Xia and Teng [14] has proposed a bi-linear bond slip model using experimental data which suitable for the CFRP/steel joints cured and tested at ambient conditions. However, developing a bond shear stressslip model using experimental results require more resources and time [14-16]. Fawzia et al. [15] successfully used the bi-linear bond-slip model to evaluate the steel/CFRP bond performance using experimental and numerical data of the joints cured and tested under ambient conditions. However, the effects of bond line temperature were not discussed with the bond slip relationships. However, Fawzia et al. [15] has mentioned that CFRP/epoxy/steel bond length should higher than the effective bond length to have a bond shear stress-slip model to independent from CFRP/epoxy/steel bond length. Chandrathilaka et al. [11] has used higher bond length than the effective bond length in CFRP/epoxy/steel bond in the experiment.

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