بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures
منتدى هندسة الإنتاج والتصميم الميكانيكى
بسم الله الرحمن الرحيم

أهلا وسهلاً بك زائرنا الكريم
نتمنى أن تقضوا معنا أفضل الأوقات
وتسعدونا بالأراء والمساهمات
إذا كنت أحد أعضائنا يرجى تسجيل الدخول
أو وإذا كانت هذة زيارتك الأولى للمنتدى فنتشرف بإنضمامك لأسرتنا
وهذا شرح لطريقة التسجيل فى المنتدى بالفيديو :
http://www.eng2010.yoo7.com/t5785-topic
وشرح لطريقة التنزيل من المنتدى بالفيديو:
http://www.eng2010.yoo7.com/t2065-topic
إذا واجهتك مشاكل فى التسجيل أو تفعيل حسابك
وإذا نسيت بيانات الدخول للمنتدى
يرجى مراسلتنا على البريد الإلكترونى التالى :

Deabs2010@yahoo.com


-----------------------------------
-Warning-

This website uses cookies
We inform you that this site uses own, technical and third parties cookies to make sure our web page is user-friendly and to guarantee a high functionality of the webpage.
By continuing to browse this website, you declare to accept the use of cookies.
منتدى هندسة الإنتاج والتصميم الميكانيكى
بسم الله الرحمن الرحيم

أهلا وسهلاً بك زائرنا الكريم
نتمنى أن تقضوا معنا أفضل الأوقات
وتسعدونا بالأراء والمساهمات
إذا كنت أحد أعضائنا يرجى تسجيل الدخول
أو وإذا كانت هذة زيارتك الأولى للمنتدى فنتشرف بإنضمامك لأسرتنا
وهذا شرح لطريقة التسجيل فى المنتدى بالفيديو :
http://www.eng2010.yoo7.com/t5785-topic
وشرح لطريقة التنزيل من المنتدى بالفيديو:
http://www.eng2010.yoo7.com/t2065-topic
إذا واجهتك مشاكل فى التسجيل أو تفعيل حسابك
وإذا نسيت بيانات الدخول للمنتدى
يرجى مراسلتنا على البريد الإلكترونى التالى :

Deabs2010@yahoo.com


-----------------------------------
-Warning-

This website uses cookies
We inform you that this site uses own, technical and third parties cookies to make sure our web page is user-friendly and to guarantee a high functionality of the webpage.
By continuing to browse this website, you declare to accept the use of cookies.



 
الرئيسيةالبوابةالتسجيلدخولحملة فيد واستفيدجروب المنتدى

شاطر
 

 بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures

اذهب الى الأسفل 
كاتب الموضوعرسالة
Admin
مدير المنتدى
مدير المنتدى
Admin

عدد المساهمات : 17748
التقييم : 32050
تاريخ التسجيل : 01/07/2009
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى

بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures  Empty
مُساهمةموضوع: بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures    بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures  Emptyالثلاثاء 27 أبريل 2021, 4:32 am

أخوانى فى الله
أحضرت لكم بحث بعنوان
Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures
R.D.S.G. Campilho a,b,*, M.F.S.F. de Moura b, D.A. Ramantani b, J.J.L. Morais c, J.J.M.S. Domingues d
a Departamento de Economia e Gestão, Universidade Lusófona do Porto, Rua Augusto Rosa, no. 24, 4000-098 Porto, Portugal
b Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
c CITAB/UTAD, Departamento de Engenharias, Quinta de Prados, 5001-801 Vila Real, Portugal
d Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida, no. 431, 4200-072 Porto, Portugal

بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures  B_s_o_10
و المحتوى كما يلي :

Keywords:
C. Laminate
A. Carbon fibres
B. Fracture
C. Finite element analysis (FEA)
Cohesive zone model
a b s t r a c t
This work reports on an experimental and finite element method (FEM) parametric study of adhesivelybonded single and double-strap repairs on carbon-epoxy structures under buckling unrestrained compression. The influence of the overlap length and patch thickness was evaluated. This loading gains a particular significance from the additional characteristic mechanisms of structures under compression, such
as fibres microbuckling, for buckling restrained structures, or global buckling of the assembly, if no transverse restriction exists. The FEM analysis is based on the use of cohesive elements including mixed-mode
criteria to simulate a cohesive fracture of the adhesive layer. Trapezoidal laws in pure modes I and II were
used to account for the ductility of most structural adhesives. These laws were estimated for the adhesive
used from double cantilever beam (DCB) and end-notched flexure (ENF) tests, respectively, using an
inverse technique. The pure mode III cohesive law was equalled to the pure mode II one. Compression
failure in the laminates was predicted using a stress-based criterion. The accurate FEM predictions open
a good prospect for the reduction of the extensive experimentation in the design of carbon-epoxy repairs.
Design principles were also established for these repairs under buckling.
Concluding remarks
An experimental and finite element parametric study was performed on the behaviour of single and double-strap repairs of carbon-epoxy laminates under buckling unrestrained compression.
The influence of the overlap length and patch thickness on the failure modes, elastic stiffness and strength of the repairs was evaluated, to validate a finite element methodology to simulate
adhesively-bonded assemblies. This procedure used a trapezoidal
mixed-mode cohesive zone model to simulate the adhesive layer
and a stress-based criterion to predict compression failure in the
laminate. The cohesive laws of the adhesive layer in pure modes
I and II were estimated by an inverse method. The pure mode III
cohesive law was equalled to the pure mode II one. Results showed
that the finite element method can be a valuable predictive tool
and an option for the reduction of costs due to experimentation,
provided that suitable criteria are employed for the simulation of
the different types of fracture. Design principles were proposed
to execute single and double-strap repairs on composite structures
under compression, which should not be separated from the specific set of conditions selected for the repairs. For the range of overlap length (5–15 mm) and patch thickness values examined (0.6–
2.4 mm), the 15 mm overlap length double-strap repairs showed
the best results. Good results were also attained using double-strap
repairs with 10 mm of overlap length and values of patch thickness
between 1.2 and 2.4 mm, and also with single-strap repairs with an
overlap length of 15 mm.


 كلمة سر فك الضغط : books-world.net
The Unzip Password : books-world.net
أتمنى أن تستفيدوا من محتوى الموضوع وأن ينال إعجابكم

رابط من موقع عالم الكتب لتنزيل بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures
رابط مباشر لتنزيل بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures
الرجوع الى أعلى الصفحة اذهب الى الأسفل
 
بحث بعنوان Buckling Strength of Adhesively-Bonded Single and Double-Strap Repairs on Carbon-Epoxy Structures
الرجوع الى أعلى الصفحة 
صفحة 2 من اصل 1
 مواضيع مماثلة
-
» رسالة دكتوراة بعنوان Strength Design Methods for Glass Structures
» بحث بعنوان Evaluation of Thermal Properties of E-glass/Epoxy Composites Filled by Different Filler Materials
» بحث بعنوان A Parametric Study on Lateral Torsional Buckling of European IPN and IPE Cantilevers
» بحث بعنوان Effect of Aspect Ratio on Buckling Load for Laminated Composite Decks Plates
» بحث بعنوان Effect of Boundary Conditions on Buckling Load for Laminated Composite Decks Plates

صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
منتدى هندسة الإنتاج والتصميم الميكانيكى :: المنتديات الهندسية :: منتدى الأبحاث الهندسية والرسائل العلمية-
انتقل الى: