Multi-scale method for modeling thin sheet buckling under residual stresses in the context of strip rolling

Nakhoul, Rebecca; Montmitonnet, Pierre; Potier‐Ferry, Michel

doi:10.1016/j.ijsolstr.2015.03.028

Cited by 26 publications

(8 citation statements)

References 17 publications

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“…The equation was described in detail in Appendix. The buckling degree of wave in strip was obtained by using energy method to solve the equation [31][32][33]. In the buckling phase, according to the principle of large deflection energy of thin plate, the of bending strain energy U1 and mid-plane strain energy U2 were calculated.…”

Section:  mentioning

confidence: 99%

Residual stress control of hot-rolled strips during run-out table cooling

Sun

Wen

et al. 2023

Int J Adv Manuf Technol

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The strips with good flatness after finish rolling will have flatness defects such as edge wave after run-out table cooling. These defects are caused by the residual stress due to inhomogeneous thermal and microstructural behaviors during the cooling stage.The traditional residual stress control methods rely too much on experience, resulting in poor control effect and poor universality. Therefore, this study proposed two residual stress control methods based on model calculation: water flow central crown, and center wave compensation control. The former is mainly based on controlling the uniformity of strip transverse temperature and microstructure. The latter is mainly controlled by mutual compensation of internal stresses. In this paper, the mathematical models of water flow central crown cooling and critical center wave compensation stress were established respectively. Meanwhile, a post-buckling model of hot-rolled strip was established to calculate the aim flatness value at exit of finishing mill under critical compensation stress. Furthermore, a fully coupled finite element model based on temperature, phase transitions, and stress was developed and it was verified using experimental data. Finally, the above two residual stress control methods were realized in the finite element model. The results showed that the two methods can reduce the residual stress and improve the flatness, and the application of center wave compensation control is more effective.

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Section:  mentioning

confidence: 99%

Residual stress control of hot-rolled strips during run-out table cooling

Sun

Wen

et al. 2023

Int J Adv Manuf Technol

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“…Theoretical and experimental studies on the buckling behavior of a strip with initial wave and a flat strip have been conducted to enrich the strip buckling theory. Nakhoul, et al [32], applied the multi-scale method in solid mechanics to discriminate if the strip is unstable and to calculate the post-buckling behavior. Tran, et al [33], studied the relation between residual stress, global tensile stress and buckling for wavy edge flatness defect during the mechanical unloading.…”

Section: Strip Bucklingmentioning

confidence: 99%

Research and Development Trend of Shape Control for Cold Rolling Strip

Wang

Liu

2017

Chin. J. Mech. Eng.

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Shape is an important quality index of cold rolling strip. Up to now, many problems in the shape control domain have not been solved satisfactorily, and a review on the research progress in the shape control domain can help to seek new breakthrough directions. In the past 10 years, researches and applications of shape control models, shape control means, shape detection technology, and shape control system have achieved significant progress. In the aspect of shape control models, the researches in the past improve the accuracy, speed and robustness of the models. The intelligentization of shape control models should be strengthened in the future. In the aspect of the shape control means, the researches in the past focus on the roll optimization, mill type selection, process optimization, local strip shape control, edge drop control, and so on. In the future, more attention should be paid to the coordination control of both strip shape and other quality indexes, and the refinement of control objective should be strengthened. In the aspects of shape detection technology and shape control system, some new types of shape detection meters and shape control systems are developed and have successfully industrial applications. In the future, the standardization of shape detection technology and shape control system should be promoted to solve the problem of compatibility. In general, the four expected development trends of shape control for cold rolling strip in the future are intelligentization, coordination, refinement, and standardization. The proposed research provides new breakthrough directions for improving shape quality.

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“…Metalik malzemelerin yüzeyine belli bir pürüzlülük profili transfer etmek için temper haddeleme işleminden yararlanılır [6][7][8]. Bu etki mekanik olarak temper haddelemeyle % 0,3-3 arasındaki ezme miktarı oranında gerçekleştirilir [9]. Dolayısıyla sac malzemelerin yüzeylerinin pürüzlendirilmesi gerekliliği açık bir şekilde görülebilir.…”

Section: Introductionunclassified

Temper Haddelemede Pürüzlülük Transferini Etkileyen Parametrelerin İncelenmesine Yönelik Bir Derleme Çalışması

Özakın¹,

Kurgan²

2020

porta

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ÖzMalzemelerin yüzeyi, boyama kalitesi ve şekillendirme açısından belli bir pürüzlülüğe sahip olmalıdır. Yüzey pürüzlülüğü, genellikle temper haddelemesi olarak bilinen özel pürüzlü merdanelerle haddelenerek malzemeye verilir. Bir merdanenin pürüzlülüğü, haddeleme parametrelerinden etkilenir ve böylelikle malzeme yüzeyine aktarılır. Malzemede oluşturulacak olan yüzey pürüzlülüğü, boya ve/veya kaplamaların performansı açısından önemli bir faktördür. Yüzey pürüzlülüğünün az olması boya ve/veya kaplamanın yapışmasını azaltabileceği gibi, fazla olması da boya ve/veya kaplamanın yetersiz olmasına ve paslanmaya neden olabilecek ayrıca boya ve/veya kaplamanın fazla kullanılmasına sebep olarak maliyetlerin artmasına sebep olacaktır. Bu sebeplerden dolayı, bir malzeme yüzeyinin en uygun seviyede pürüzlülüğe sahip olması istenir. Bu makalede, temper haddelemede pürüzlülük transferini etkileyen parametrelere ilişkin çalışmalar referans alınarak literatür taraması yapılmıştır. Bu derleme makalesi bölümler halinde sunularak sonuca ulaşmaya çalışmaktadır. Bu bölümlerde ilk olarak temper haddeleme işlemine, pürüzlendirmenin endüstrideki önemine vurgu yapılmıştır. Sonraki bölümde temper haddeleme ile pürüzlülük transferi sürecinin nasıl gerçekleştiğine değinilmeye çalışılmıştır. Sonraki bölümde ise pürüzlülük transferini etkileyen parametrelere ilişkin çalışmalar incelenmiştir. Temper haddelemede pürüzlülük transferini etkileyen parametrelerin, pürüzlülük transfer oranını nasıl etkiledikleri irdelenmiştir. Elde edilen sonuçlar göz önüne alınarak son bölümde temper haddeleme işlemi neticesinde oluşan pürüzlülük profilinin nasıl olması gerektiği tartışılmıştır. Bu sayede endüstrideki üreticilerin bu çalışmadan en iyi şekilde faydalanmasına yönelik sonuçlar elde edilmeye çalışılmıştır. Aynı zamanda literatüre kazandırılabilecek çalışmalar hakkında birtakım değerlendirmeler yapılmıştır.

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Multi-scale method for modeling thin sheet buckling under residual stresses in the context of strip rolling

Cited by 26 publications

References 17 publications

Residual stress control of hot-rolled strips during run-out table cooling

Residual stress control of hot-rolled strips during run-out table cooling

Research and Development Trend of Shape Control for Cold Rolling Strip

Temper Haddelemede Pürüzlülük Transferini Etkileyen Parametrelerin İncelenmesine Yönelik Bir Derleme Çalışması

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