Setar Production Modification With Vibration Analysis

, M.Sc. Thesis Sharif University of Technology Mansour, Hossein (Author) ; Behzad, Mehdi (Supervisor)

Abstract

Setar is a traditional Persian musical instrument. Nowadays, Setar is one of the most common musical instruments in Persian music. A systematic method for Setar production modification has not been introduced yet. This work is the first scientific work about analysis of this instrument. The aim of this study is to undertake early steps for Setar quality improvement. In this thesis, after analysis of the wood using in Setar construction, numerical and experimental methods have been utilized to analyze this instrument. After that, some works has been performed to extract an objective function which can judge about Setar quality. The results show good agreement between experimental and...

An Experimental Evaluation of Environmental Effects on Fiber Composites-Construction Materials Interface

, Ph.D. Dissertation Sharif University of Technology Yarigarravesh, Mahdireza (Author) ; Mofid, Masood (Supervisor) ; Toufigh, Vahab (Supervisor)

Abstract

Most of the investigations during the two past decades focused on the effect of moisture and temperature on the bond at the interface of carbon or glass-fabrics and concrete, masonry or timber. Few investigations have studied the effect of chemical solutions, dry heat exposure and ultravilolent (UV) radiation on the bond at the interface of other types of fiber reinforced-polymers (FRPs) and masonry, timber and concrete in the short and long terms. Therefore, this research aims to investigate the effect of five chemical solutions with pH of 2.5±0.1, 7±0.1, 7.25±0.1, 10±0.1 and 12.5±0.1 on the interfacial bond strength between seven types of FRPs (unidirectional, bidirectional and hybrids)...

Investigating the Bonding of Fiber Reinforced Polymers (FRP) to Wood at Different Temperatures

, M.Sc. Thesis Sharif University of Technology Lotfalipour, Farzad (Author) ; Toufigh, Vahab (Supervisor)

Abstract

Polymer reinforced fibers are used as a widely used composite material for various applications in the construction and civil engineering industry due to several advantages, such as high strength, low weight, and corrosion resistance. One of the important applications of these fibers is to strengthen wood, which can significantly improve its mechanical properties, including strength, hardness, and stability. However, the behavior of FRPs under different temperature conditions has not been fully investigated yet. This study has presented a research approach to evaluate the connection of various fibers reinforced with polymer (FRP) to wood under different temperature conditions. In this...