The Flexural Fatigue Behavior of Honeycomb Sandwich Composites Following Low Velocity Impacts

Abstract

This study experimentally investigated the flexural fatigue behaviors of honeycomb sandwich composites subjected to low velocity impact damage by considering the type and thickness of the face sheet material, the cell size and the core height parameters. Carbon-fiber reinforced composite and the aluminum alloy was used as the face sheet material. First, the static strength of undamaged and damaged specimens was determined by three-point bending loads. Secondly, the fatigue behaviors of the damaged and undamaged specimens were determined. Low velocity impact damage decreased the flexural strength and fatigue lives but increased the damping ratio for all specimens. Maximum damping ratio values were observed on specimens with a aluminum face sheet.

Impactor Diameter and Ply Number Effects on the Impact Behavior of Carbon Fiber Composite Laminates

“…However, damage caused by parts, tool falls on the components during maintenance, bird strikes on the landings and takeoffs of aircrafts, hail often result in delamination, matrix cracking and fiber breakage damage to the internal surfaces of composite materials. [3,[4][5][6][7][8]. These damages generally occur as a result of low velocity impacts which defined in the velocity range between 1 m/s and 10 m/s [9].…”

Numerical analysis of the stressed state of composite plates with a core layer made of tetrachiral honeycombs under static bending

“…определяют механические свойства композитной пластины. При этом наибольшее распространение в качестве заполнителя получили обычные шестиугольные соты[54, 59,63,65,66,78,[89][90][91][92][93], проявляющие положительный коэффициент Пуассона в плоскости[9, 11,57]. Однако, наряду с развитием новых технологий, в том числе аддитивного производства[62, 82, 96,100], набирают популярность новые геометрии сот[85, 103], среди которых немалую часть составляют соты с отрицательным коэффициентом Пуассона (ауксетические соты)[15, 39-41, 50, 61, 68, 74, 79, 81, 103, 104].1.Crupi, Epasto и Guglielmino[54] теоретически и экспериментально исследовали влияние размера элементарных ячеек шестиугольного сотового заполнителя на механическое поведение сэндвич-композитов при трехточечном изгибе и ударной нагрузке.…”