Damage tolerance of CSM laminates subject to low velocity oblique impacts

Madjidi, S.; Arnold, W.S.; Marshall, I.H.

doi:10.1016/0263-8223(95)00137-9

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…Clearly, the normal impact response exhibits a much higher force in comparison to that of the non-normal impact cases. Similar observations were reported in an early literature by [2] on low-velocity impact response of normal and oblique impact on composite structures with specific governing equations for the system of forces present during the normal and non-normal or oblique impact. The range of impact velocity for the series of experimental test in the study was up to 5.42 m/s.…”

Section: Resultssupporting

confidence: 76%

“…Finally, at 20°, evidence of significant rear surface damage was apparent as shown in Figure 7(c). These observations can be quantified using a simple geometric analysis, where the ratio of the surface area of an elliptical oblique cylinder to that of a right cylinder in which the projectile creates an elliptical entrance hole on the top surface of the target, as given in Equations (1) and (2). In this work, two cases were considered; i.e., inclination angles of 10° and 20° relative to the normal (θ: 0°).…”

Section: Resultsmentioning

confidence: 99%

“…by precipitating a reduction in the strength of the structure which can lead to catastrophic failure [1][2][3][4][5][6][7]. Under low-velocity impact, the damage is frequently barely visible (BVID) and often cannot be detected by Non-Destructive Testing (NDT).…”

Section: Introductionmentioning

confidence: 99%

“…To-date, a limited number of studies have focused on the oblique impact response of composites and sandwich structures [8,9,[13][14][15][16][17][18][19]. Moreover, most of these works are dedicated to ballistic impact [2,20]. Wen et al [21] highlighted three important steps of panel failure during deformation in a sandwich structure; these being (i) initial failure where one of the skins of the panel is fractured with or without considerable deformation of the core; (ii) penetration of the indenter through the thickness of the panel; and (iii) perforation of the panel when the whole of the indenter has emerged through the panel.…”

Section: Introductionmentioning

confidence: 99%

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Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Fadzullah¹,

Ifayefunmi²,

Mustafa³

et al. 2017

Int. J. Automot. Mech. Eng.

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This paper presents the perforation behaviour of polyethylene terephthalate (PET) foam cored sandwich structures when subjected to quasi-static and dynamic loading at normal (0°) and oblique angles of 10° and 20°. An instrumented drop-weight hammer rig was used with fully-clamped conditions for the low-velocity impact test with impact energy of 40 J and velocity of 3.78 m/s. Meanwhile, the quasi-static indentation test was carried out using a universal testing machine via an Instron 4505, at crosshead displacement rate of 1 mm/min, with boundary conditions similar to those of the dynamic test. Results obtained showed that the normal impact generated the highest peak force for both the first and second peaks, which are associated with the damage to the top and bottom skins of the sandwich structures. Moreover, regardless of whether the test was done on the normal or inclined angles, it was observed that the dynamic loading produced higher force magnitude in comparison to those of the quasi-static response, due to the enhanced strength and stiffness of the components because of the strain rate and inertia effects. However, in terms of the damage profiles, it is evident that the maximum damage area increased with the increase inclination angle as supported by simple geometric analysis. For the oblique impact cases, the damage was due to the combined effect of tensile, compression, and shear for impact at 10°. The damage occurred as a result of pure shearing for the 20° impact case. In conclusion, the perforation behaviour at inclined angles allowed more area to be perforated in comparison to those of the normal cases.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Fadzullah¹,

Ifayefunmi²,

Mustafa³

et al. 2017

Int. J. Automot. Mech. Eng.

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“…Ghasemi-Nejhad and Parvizi-Majidi (1990) and Madjidi et al (1996) utilized a DWIT machine which had ability to test specimen with any angle in mounting, also they studied compressive behaviour of the specimen after impact test.…”

Section: Introductionmentioning

confidence: 99%

Designing and manufacturing of a drop weight impact test machine

Taheri‐Behrooz¹,

Shokrieh²,

Abdolvand³

2013

10.5267/j.esm

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A state of the art instrumented Drop Weight Impact Tester Machine was developed in Iran University of Science and Technology which measures the energy absorption of composite materials under impact load. The output of the machine is used to draw load-time graph and calculate the amount of energy absorbed by the specimens. The machine was equipped with various sensor systems to measure the velocity of the impactor just before it contacts the specimen and the amount of contact force, and with a data acquisition system to record the force and time history. Capability of testing according to many different types of standards and capability of studying behaviour of the specimen after impact are two important characteristics of this machine. This designed system, after manufacturing and calibration, was installed and successfully utilized.

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Influence of Oblique Impact on Glass Fiber-Reinforced Polymer Composites: A Numerical Approach

Rawat

Singh

et al. 2019

Lecture Notes on Multidisciplinary Industrial Engineering

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Damage tolerance of CSM laminates subject to low velocity oblique impacts

Cited by 14 publications

References 9 publications

Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Designing and manufacturing of a drop weight impact test machine

Influence of Oblique Impact on Glass Fiber-Reinforced Polymer Composites: A Numerical Approach

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