Bio-reduction of composite materials is the modern approach to facilitate researchers avoid toxic chemical exposure during reduction process. In this study, green graphene oxide using Abutilon indicum (Tamil name: Thuthi) plant leaves extracted from various solvents were used as filler material (0.3, 0.6 and 1 wt.%) in glass fibre epoxy composite. Compression moulding process was adopted fabric...

Delaminations are a concern for the structural integrity of fibre composite structures. The decisive material parameter delaminations is fracture toughness. Structures usually have multidirectional ply stacking. However, interface orientation dependant toughness values and R-curve effects neglected in numerical delamination analysis. This work investigates specific considers mode I to improve s...

PURPOSE The purposes of this study were (1) to examine whether posterior delamination is hidden to the most commonly used posterior viewing portal compared with differential rotator cuff portals and (2) to observe posterior delamination patterns so that a treatment-based classification system may be proposed. METHODS One-hundred thirty consecutive patients undergoing arthroscopic rotator cuff...

Abstract Fragmentation testing has been used for decades to assess thin film fracture and delamination. Hooke’s law is generally determine a stress from the crack onset strain observed in micrographs or measured as an electrical resistance increase. While this method theory suitable elastic regime, it neglects important characteristics, such residual stress, microstructure, architecture. Thus, ...

The impact of thermal barrier coatings by hard projectiles at high temperature has been analyzed. Three different domains have been explored: each differentiated by particle size, velocity, temperature and TBC composition. Domain I applies when the projectile creates deeply penetrating plastic/densification zones. In this case, short time elastic effects are relatively unimportant. The response...

The use of fiber reinforced plastics has increased in the last decades due to their unique properties. Advantages of their use are related with low weight, high strength and stiffness. Drilling of composite plates can be carried out in conventional machinery with some adaptations. However, the presence of typical defects like delamination can affect mechanical properties of produced parts. In t...

BACKGROUND Femoroacetabular impingement (FAI), it is a clinical syndrome relatively recently recognized as source of hip mechanic pain and early osteoarthritis. Two types of FAI have been described, based on the bone morphology and pattern of chondral and labral damage; the cam type is frequently associated with chondral delamination; and the pincer type is associated with a contre-coup injury ...