The effect of the impactor diameter and temperature on low velocity impact behavior of CFRP laminates

Published on Feb 24, 2017
· DOI :10.1063/1.4975429
C. Evci1
Estimated H-index: 1
I. Uyandıran1
Estimated H-index: 1
Impact damage is one of the major concerns that should be taken into account with the new aircraft and spacecraft structures which employ ever-growing use of composite materials. Considering the thermal loads encountered at different altitudes, both low and high temperatures can affect the properties and impact behavior of composite materials. This study aims to investigate the effect of temperature and impactor diameter on the impact behavior and damage development in balanced and symmetrical CFRP laminates which were manufactured by employing vacuum bagging process with autoclave cure. Instrumented drop-weight impact testing system is used to perform the low velocity impact tests in a range of temperatures ranged from 60 down to −50 °C. Impact tests for each temperature level were conducted using three different hemispherical impactor diameters varying from 10 to 20 mm. Energy profile method is employed to determine the impact threshold energies for damage evolution. The level of impact damage is determ...
📖 Papers frequently viewed together
30 Citations
3 Citations
32 Citations
#1Celal Evci (Turkish Military Academy)H-Index: 4
Abstract This study investigates the low velocity impact properties such as damage thresholds, critical energy thresholds and damage process of laminated composites. Damage thresholds of Hertzian failure and main failure corresponding to woven and unidirectional Glass Fiber Reinforced Polymer laminates in varying thicknesses from 2 mm to 8 mm are determined through impact tests with nominal impact energies of 4, 6, and 8 J/layer. Hertzian failure and main failure thresholds of a composite lamina...
29 CitationsSource
#1R. Suvarna (University of Southampton)H-Index: 1
#2Vellayaraj Arumugam (Anna University)H-Index: 18
Last. Carlo SantulliH-Index: 34
view all 5 authors...
Abstract The effect of temperature on the low velocity impact resistance properties and on the post-impact flexural performance of CFRP laminates were studied. With this aim, 150 × 75 mm cross-ply carbon fibre/epoxy laminates with a [0/90/90/0] 2s layup, therefore with a total of sixteen layers, were impacted at ambient temperature (30 °C) and at elevated temperatures (55, 75 and 90 °C) at a velocity of 2 m/s using a drop weight impact tower. This was followed by flexural tests carried out at am...
35 CitationsSource
#1Celal Evci (Turkish Military Academy)H-Index: 4
#2Müfit Gülgeç (Çankaya University)H-Index: 4
Abstract Due to the improved impact performance characteristics, composites are widely used in engineering and military applications to absorb the impact energy. Determination of impact response of composite materials provides the engineer and the manufacturer with critical knowledge to understand the failure criteria, initiation of the first failure and damage growth through the laminates. This study covers the investigation of impact damage growth and determination of Hertzian failure and maxi...
118 CitationsSource
#1Semih Benli (Dokuz Eylül University)H-Index: 6
#2Onur SaymanH-Index: 25
The aim of this study is to investigate the effects of temperature and thermal residual stresses on the impact behavior and damage of unidirectional glass/epoxy laminated composites. To this end, thermal stress analyses of the laminates with lay-ups [90/0/0/90]s, [90/0/45/45]s, [0/90/45/-45]s were carried out under temperatures of 20, 90 and -50 °C by using ANSYS software. Damage parameters proposed by Hou et al. [13] were used for failure analyses. Also, the impact tests on the laminated compos...
10 CitationsSource
#1Tom Mitrevski (Monash University)H-Index: 4
#2Ian H Marshall (Monash University)H-Index: 11
Last. Rodney S. Thomson (CRCs: Cooperative Research Centre)H-Index: 26
view all 3 authors...
Abstract The post-impact damage properties of composite laminates impacted by various impactor shapes are investigated herein. This investigation is a continuation of the research conducted in [Mitrevski T, Marshall IH, Thomson R, Jones R, Whittingham B. The effect of impactor shape on the impact response of composite laminates. Compos Struct 2005;67(2):139–48]. After impacting thin woven carbon/epoxy laminates using hemispherical, ogival and conical steel impactors all 12 mm in diameter using a...
109 CitationsSource
#1T. Gómez-del Río (Charles III University of Madrid)H-Index: 10
#2Ramón Zaera (Charles III University of Madrid)H-Index: 33
Last. Carlos Navarro (Charles III University of Madrid)H-Index: 22
view all 4 authors...
Abstract This work examines the response of carbon fibre-reinforced epoxy matrix (CFRP) laminates at low impact velocity and in low temperature conditions. Square specimens of carbon fibre/epoxy laminates with different stacking sequences (unidirectional, cross-ply, quasi-isotropic and woven laminates) were tested using a Drop Weight Tower device. The test temperature ranged from 20 down to −150 °C. After the impact tests, the damage extension was measured by C-Scan ultrasonic inspection and the...
134 CitationsSource
#1Tien-Wei Shyr (FCU: Feng Chia University)H-Index: 14
#2Yu-Hao Pan (FCU: Feng Chia University)H-Index: 2
Abstract This paper presents an investigation into the damage characteristics and failure strengths of composite laminates at low velocity impact tests. Three E-glass fabrics, non-crimp fabric, woven fabric, and nonwoven mat, were selected as reinforcements for the composite laminates. Impact tests were conducted using a guided drop-weight test rig in ascending energy to 24 J/layer nominal impact energy. Metallographic microscopy was used to observe the damage characteristics of the perpendicula...
312 CitationsSource
#1L.S. Sutherland (Technical University of Lisbon)H-Index: 17
An instrumented falling weight machine was used to investigate the effects of test parameters on the impact response of low fibre-volume E-glass woven-roving reinforced polyester coupons. Statistical experimental design techniques were used to plan the experiment and to analyse the data. All the parameters considered were found to affect the responses in a complex and interacting manner. Multiple damage modes occurred and the damage mechanisms were seen to vary with the test parameters. Identifi...
59 CitationsSource
#1Giovanni Belingardi (Polytechnic University of Turin)H-Index: 26
#2R. Vadori (Polytechnic University of Turin)H-Index: 6
This work deals with the characterization of composite material suitable for constructing structural parts devoted to dissipate kinetic energy during impacts. In particular glass-fiber-epoxy matrix laminates are considered, both with unidirectional layers and with woven layers stacking, with three different layers orientations.Experimental tests are performed according to ASTM standards using a free-fall drop dart testing machine. The specimens are plates completely constrained on a circular edg...
239 CitationsSource
#1G.A. Schoeppner (AFRL: Air Force Research Laboratory)H-Index: 4
#2Serge Abrate (SIU: Southern Illinois University Carbondale)H-Index: 26
Abstract An investigation of the low velocity impact load level at which a composite laminate will delaminate is presented. The delamination threshold load is described as the load level, obtained from the load–time history or load–displacement plot, at which a sudden load drop occurs due to specimen stiffness loss as a result of laminate level damage. Approximately 500 low velocity impact load–time histories from the Air Force Research Laboratory (AFRL) Low Velocity Impact Database are used to ...
392 CitationsSource
Cited By4
#1M. R. RicciardiH-Index: 11
#2Ilaria Papa (University of Naples Federico II)H-Index: 11
Last. Vincenza AntonucciH-Index: 21
view all 6 authors...
Abstract Epoxy based laminates reinforced with woven basalt fibres have been manufactured and characterized by quasi-static mechanical tests and low-velocity impact tests. Samples were prepared by infusion of 16 plies of basalt under pre-optimized conditions. All the interlaminar shear strength, flexural and impact tests were carried out at room temperature, -25°C and -50°C to investigate the effect of temperature on the mechanical characteristics and the impact damage onset and propagation. Ult...
3 CitationsSource
#1Yawei Fang (Hunan University)H-Index: 2
#2Zhi Fang (Hunan University)H-Index: 11
Last. Deju Zhu (Hunan University)H-Index: 27
view all 5 authors...
Abstract This paper experimentally investigated the effect of temperature on the transverse impact response of preloaded carbon fiber reinforced polymer (CFRP) wire. The CFRP wires with a glass transition temperature of 99 °C were tested in the temperature range of -40 to 80 °C using a drop-weight impact test system. The results show that the maximum impact force, maximum wire tension and transverse deflection at fracture of the wire increased as the temperature increased from -40 to 80 °C, due ...
3 CitationsSource
#1Jianwu Zhou (NPU: Northwestern Polytechnical University)H-Index: 4
#2Binbin Liao (ZJU: Zhejiang University)H-Index: 1
Last. Liyong JiaH-Index: 3
view all 6 authors...
Abstract This paper experimentally studies the low-velocity impact behaviors and residual tensile strength of carbon fiber reinforced plastics (CFRP) laminates. Firstly, the effects of four factors, i.e. impact angle, impactor diameter, the proportion of ply orientation and stacking sequence, on the impact responses of laminates are studied. The damage characteristics are evaluated by dent depth, delamination damage projection area (DDPA) and energy dissipation. Secondly, the tensile responses o...
21 CitationsSource
#2Vikram YadamaH-Index: 12
Last. Debes BhattacharyyaH-Index: 62
view all 4 authors...
8 CitationsSource