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Full-Text Articles in Mechanical Engineering
Transverse Compression Of High-Performance Ballistic Fibers, Zherui Guo
Transverse Compression Of High-Performance Ballistic Fibers, Zherui Guo
Open Access Theses
High performance ballistic fibers have been in use for decades, specifically in protective applications against ballistic impact such as bulletproof vest layers and aircraft turbine engine fragmentation barriers. These high performance fibers have extremely high strength-to-weight ratios and high moduli of elasticity in the axial direction, making them extremely suitable for high impact situations. In particular, para-phenyleneterephthalamide (PPTA for short) fibers such as Kevlar® and ultra-high-molecular-weight polyethylene fibers such as Dyneema® are amongst the more popular high performance fibers in today's world. While the longitudinal mechanical response of these fibers have been extensively researched, their transverse mechanical response …
Study Of Aluminum Honeycomb Sandwich Composite Structure For Increased Specific Damping, Aditi S. Joshi
Study Of Aluminum Honeycomb Sandwich Composite Structure For Increased Specific Damping, Aditi S. Joshi
Open Access Theses
The aluminum honeycomb sandwich composite structure is commonly used in the aerospace and automotive applications where high strength to weight ratio is desirable. However the poor performance of the aluminum honeycomb sandwich composite structure in terms of the vibration damping and the sound transmission makes their applications limited. Studying the effect of different structural modifications on the damping has become an interesting area of research in past few decades. The present study addresses the effect of adding a mass on the composite beam at various locations on the damping loss factors for the modes of vibration present in the frequency …