Equipment and components made of plastics and composites are widely used in highly corrosive environments in the processing industry. Examples are the storage tanks, pumps and pipes for chemical transport and stacks in combustion plants. The demand for reliable nondestructive testing of plastic process equipment has increased significantly in recent years. Glass fiber reinforced plastics (GRP) ...

In this work, transient dynamic stress concentration in a hybrid composite laminate subjected to a sudden internal crack is examined. It is assumed that all fibers lie in one direction and the applied load acts along direction of fibers. Two types arrangements are considered for the fiber; square and hexagonal arrangement. Using shear lag model, equilibrium equations are deduced and upon proper...

 The structural reliability of torsional concrete beams strengthened with full and strip wrapping of carbon fiber reinforced polymer (CFRP) laminate is investigated. The first order-second moment reliability method has been applied to make a reliability assessment on the torsional capacity design by technical guideline in Iran. The code No.345 published by the Management and Planning Organizati...

The structural health monitoring of composite laminates is a rapidly emerging need in applications. Different real-time sensors integrated into have been proposed, such as fiber Bragg gratings and piezoceramics. However, their presence negatively affects the mechanical properties hosting laminate. This work proposes non-invasive method for piezoelectric functionalization by interleaving lead zi...

The optimization of composite laminates using ply orientation angle as a discrete variable provides an example to demonstrate an approach for discrete optimization under uncertainty. The use of ply orientation angles as continuous design variables becomes a non-viable approach from a manufacturing perspective. Optimization under uncertainty accounts for design variables and external parameters ...

A highly sensitive temperature sensor based on an all-fiber Sagnac loop interferometer combined with metal-filled side-hole photonic crystal fiber (PCF) is proposed and demonstrated. PCFs containing two side holes filled with metal offer a structure that can be modified to create a change in the birefringence of the fiber by the expansion of the filler metal. Bismuth and indium were used to exa...

Carbon fiber reinforced polymer (CFRP) composites have been widely used in aviation, aerospace and other fields due to their excellent mechanical properties. However, it is difficult observe delamination damage during the manufacturing, machining, assembling as well transportation of composite materials, especially for joint structures. The around hole one important factors service performance....