A Mixed StressDisplacement Approach Model of Homogeneous Shells for Elastodynamic Problems
المؤلفون المشاركون
Díaz Díaz, Alberto
Domínguez Alvarado, Axel Fernando
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-15، 15ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-01-13
دولة النشر
مصر
عدد الصفحات
15
التخصصات الرئيسية
الملخص EN
This paper presents the development of a model of homogeneous, moderately thick shells for elastodynamic problems.
The model is obtained by adapting and modifying SAM-H model (stress approach model of homogeneous shells) developed by Domínguez Alvarado and Díaz in (2018) for static problems.
In the dynamic version of SAM-H presented herein, displacements and stresses are approximated by polynomials of the out-of-plane coordinate.
The stress approximation coincides with the static version of SAM-H when dynamic effects are neglected.
The generalized forces and displacements appearing in the approximations are the same as those involved in a classical, moderately thick shell model (CS model) but the stress approximation adopted herein is more complex: the 3D motion equations and the stress boundary conditions at the faces of the shell are verified.
The generalized motion and constitutive equations of dynamic SAM-H model are obtained by applying a variant of Euler–Lagrange equation which includes pertinently Hellinger–Reissner functional.
In the constitutive equations, Poisson’s effect of out-of-plane normal stresses on in-plane strains is not ignored; this is one important feature of SAM-H.
To test the accuracy of dynamic SAM-H model, the following structures were considered: a hollow sphere and a catenoid.
In each case, eigenfrequencies are first calculated and then a frequency analysis is performed applying a harmonic load.
The results are compared to those of a CS model, MITC6 (mixed interpolation of tensorial components with 6 nodes per element) shell element calculations, and solid finite element computations.
In the two problems, CS, MITC6, and dynamic SAM-H models yield accurate eigenfrequencies and eigenmodes.
Nevertheless, the frequency analysis performed in each case showed that dynamic SAM-H provides much more accurate amplitudes of stresses and displacements than the CS model and the MITC6 shell finite element technique.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Domínguez Alvarado, Axel Fernando& Díaz Díaz, Alberto. 2020. A Mixed StressDisplacement Approach Model of Homogeneous Shells for Elastodynamic Problems. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1195969
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Domínguez Alvarado, Axel Fernando& Díaz Díaz, Alberto. A Mixed StressDisplacement Approach Model of Homogeneous Shells for Elastodynamic Problems. Mathematical Problems in Engineering No. 2020 (2020), pp.1-15.
https://search.emarefa.net/detail/BIM-1195969
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Domínguez Alvarado, Axel Fernando& Díaz Díaz, Alberto. A Mixed StressDisplacement Approach Model of Homogeneous Shells for Elastodynamic Problems. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1195969
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1195969
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر