رسالة جامعية
Some Experimental and Numerical Studies on Evaluation of Adhesive Bond Integrity of Composites Lap Shear Joints
| العنوان: | Some Experimental and Numerical Studies on Evaluation of Adhesive Bond Integrity of Composites Lap Shear Joints |
|---|---|
| المؤلفون: | Vijaya Kumar, R L |
| المساهمون: | Murthy, C R L, Bhat, M R |
| سنة النشر: | 2014 |
| المجموعة: | Indian Instiute of Science, Bangalore: etd@IIsc (Electronic Theses and Disserations) |
| مصطلحات موضوعية: | Adhesive Bonding, Composite Lap Joints, Adhesive Joints, Glass Fiber Reinforced Plastic Adhesive Joints, Carbon Fiber Reinforced Plastic Adhesive Joints, Composite Adhesive Joints, Composite Lap Shear Joints, Non Destructive Evaluation - Adehsive Joints, Composite Epoxy Adhesive Lap Joints, Composite Bonded Joints, Aerospace Composites, Composite Single Lap Joint, Composite Adhesively Bonded Joints, Composite Adhesive Lap Joints, Composite Single-lap Joints, Adhesively Bonded Joints, Single Lap Shear Joints, Adhesively Bonded Composite Lap Joints, Adhesive Bond Integrity, Aerospace Engineering |
| الوصف: | Adhesive bonding which has been in use for long as a traditional joining method has gained ground in the last couple of decades due to the introduction of advanced composite materials into the aerospace industry. Bonded structures have advantages such as high corrosion and fatigue resistance, ability to join dissimilar materials, reduced stress concentration, uniform stress distribution, good damping characteristics etc. They also have certain limitations like environmental degradation, existence of defects like pores, voids and disbonds, difficulty in maintenance and repair etc. A serious drawback in the use of adhesively bonded structures has been that there are no established comprehensive non-destructive testing (NDT) techniques for their evaluation. Further, a reliable evaluation of the effect of the existing defects on strength and durability of adhesive joints is yet to be achieved. This has been a challenge for the research and development community over several decades and hence, been the motivation behind this piece of research work. Under the scope of the work carried out in the thesis, some of the primary factors such as the existence of defects, degradation of the adhesive, stress and strain distribution in the bonded region etc., have been considered to study the bond integrity in composite to composite lap shear joints. The problem becomes complex if all the parameters affecting the adhesive joint are varied simultaneously. Taking this into consideration, one of the key parameters affecting the bond quality, viz., the adhesive layer degradation was chosen to study its effect on the bonded joint. The epoxy layer was added with different, definite amount of Poly vinyl alcohol (PVA) to arrive at sets of bonded joint specimens with varied adhesive layer properties. A thorough review of different non destructive testing methods applied to this particular problem showed that ultrasonic wave based techniques could be the right choice. To start with, preliminary experimental investigations were carried on ... |
| نوع الوثيقة: | thesis |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | G26587; http://etd.iisc.ac.in/handle/2005/3220Test; http://etd.iisc.ac.in/static/etd/abstracts/4082/G26587-Abs.pdfTest |
| الإتاحة: | http://etd.iisc.ac.in/handle/2005/3220Test http://etd.iisc.ac.in/static/etd/abstracts/4082/G26587-Abs.pdfTest |
| رقم الانضمام: | edsbas.8FF3D5B6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |