106 Characterization of drop-weight impact damage behavior of CFRP laminates toughened by interleaf layers

The development characteristics of impact-induced damage in carbon-fiber-reinforcedplastics (CFRP) laminates were experimentally studied using a drop-weight impact tester. Five types of CFRP laminates were used to investigate the effect of stacking sequences and thicknesses. The efficiency of absorbed energy to impact energy was different for CFRP laminates with different stacking sequences or thicknesses. The DA/AE ratio of delamination area (DA) to absorbed energy (AE) was almost the same for CFRP laminates with the same stacking sequence regardless of the thickness. We found that the DA/AE ratio could be used as a parameter to characterize the impact damage resistance in CFRP laminates with different stacking sequences.

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Characterization of high-velocity impact damage in CFRP laminates: Part II – prediction by smoothed particle hydrodynamics

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2013.04.012 ◽

2014 ◽

Vol 56 ◽

pp. 308-318 ◽

Cited By ~ 16

Author(s):

Shigeki Yashiro ◽

Keiji Ogi ◽

Akinori Yoshimura ◽

Yoshihisa Sakaida

Keyword(s):

Smoothed Particle Hydrodynamics ◽

High Velocity ◽

Impact Damage ◽

High Velocity Impact ◽

Velocity Impact ◽

Cfrp Laminates ◽

Particle Hydrodynamics ◽

Smoothed Particle

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Detection and evaluation of barely visible impact damage in woven glass fabric reinforced polyamide 6.6/6 composite using ultrasonic imaging, X-ray tomography and optical profilometry

International Journal of Damage Mechanics ◽

10.1177/1056789520957703 ◽

2020 ◽

pp. 105678952095770

Author(s):

N Miqoi ◽

P Pomarede ◽

F Meraghni ◽

NF Declercq ◽

L Guillaumat ◽

...

Keyword(s):

Impact Loading ◽

Impact Damage ◽

Woven Fabric ◽

Glass Fabric ◽

Optical Profilometry ◽

Damage Mechanisms ◽

X Ray ◽

Drop Weight ◽

Weight Impact ◽

Polyamide 6.6

The present experimental work investigates the response of woven glass fabric reinforced polyamide 6.6/6 subjected to drop weight impact loading. The main objective is the development and the introduction of a new experimental procedure/approach, based on different complementary detection techniques, that aims at investigating the damage induced by impact loading in thermoplastic woven fabric composites. The developed approach is intended to be generalized to other types of composite materials. The main idea is to assess all the experimental results obtained through the developed procedure with a direct investigation method. The latter consists in the Permanent Indentation (PI) measurement providing an indicator of the damage criticality in the composite sample. To this end, several non-destructive testing methods are carried-out and their experimental findings are analyzed and cross-linked. The identification of the different damage mechanisms, caused by the drop weight impact, is performed using X-Ray micro-computed tomography (µCT). C-scan ultrasonic investigation is conducted according to two types: transmission and reflection for the detection of the impact damage and the identification of the induced degradation area. B-scan imaging are then obtained through specific post-processing of the impacted surface to extract the permanent indentation (PI). The latter is validated through surface flatness measurement using the highly resolved 3D optical profilometry. The correlation between the X-Ray tomography results and the permanent indentation measurement is then established. It correlates the PI level with the damage mechanisms of a barely visible impact damage (BVID) in woven glass reinforced polyamide 6.6/6 composite.

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Sorption and diffusion of moisture in polymer composite materials with drop-weight impact damage

Mechanics of Composite Materials ◽

10.1007/s11029-016-9547-6 ◽

2016 ◽

Vol 51 (6) ◽

pp. 761-770 ◽

Cited By ~ 2

Author(s):

V. O. Startsev ◽

S. V. Panin ◽

O. V. Startsev

Keyword(s):

Composite Materials ◽

Polymer Composite ◽

Impact Damage ◽

Polymer Composite Materials ◽

Drop Weight ◽

Weight Impact ◽

And Diffusion

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Measurement of Falling Weight Impact Damage and Temperature Change of CFRP Laminates

The Proceedings of the Materials and Mechanics Conference ◽

10.1299/jsmemm.2017.os1011 ◽

2017 ◽

Vol 2017 (0) ◽

pp. OS1011

Author(s):

Ryunosuke ABE ◽

Masahiro HOSOI ◽

Mamoru MIZUNO ◽

Jian SHI

Keyword(s):

Temperature Change ◽

Impact Damage ◽

Cfrp Laminates ◽

Weight Impact ◽

Falling Weight

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3D Progressive Failure Modeling of Drop-Weight Impact on Composite Laminates

10.31219/osf.io/rhmns ◽

2018 ◽

Author(s):

DC Pham

Keyword(s):

Composite Laminates ◽

Impact Damage ◽

Progressive Failure ◽

Damage Model ◽

Matrix Cracking ◽

Structural Level ◽

Velocity Impact ◽

Drop Weight ◽

Weight Impact ◽

The Impact

Composite laminates are susceptible to out-of-plane impact loads due to the lack of reinforcement in the through-thickness direction. Unlike the localized damage induced by a high velocity impact where the incident energy is dissipated near a contact area, low velocity impact damage involves multiple failure mechanisms such as matrix cracking, fiber breakage, and widespread interface delaminations. Depending on the extent of damage, significant reduction in the load-bearing capability of the structure has been observed. The prediction of composite impact damage resistance by a reliable progressive damage analysis tool is essential to reduce intensive and expensive certification tests at structural level. In this work, an enhanced explicit 3D damage model is implemented via VUMAT in Abaqus to perform a drop-weight impact simulation of a [454/04/-454/904]s Hexply AS4/8552 composite laminate. The impact-induced damage and its extent are captured by a 3D Continuum Damage Model (CDM) coupled with an energy driven failure mechanism. The developed module provides a unified solution process for the impact response prediction followed by the residual strength prediction under compression within an explicit solver. Two examples are selected to demonstrate the capability of the progressive failure analysis under dynamic and static loading: 1) a drop-weight test; and 2) an open-hole tension test. Numerical predictions from the developed VUMAT are compared with the test data and predictions using the open source CompDam code developed by NASA.

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Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Journal of Composite Materials ◽

10.1177/00219983211058796 ◽

2021 ◽

pp. 002199832110587

Author(s):

Sultan M Bayazeid ◽

Kim-Leng Poon ◽

Balakrishnan Subeshan ◽

Mohammed Alamir ◽

Eylem Asmatulu

Keyword(s):

Tensile Strength ◽

Carbon Fiber ◽

Impact Test ◽

Impact Damage ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Drop Weight ◽

Carbon Fiber Reinforced Composites ◽

Weight Impact ◽

The Impact

Carbon fiber–reinforced composites (CFRCs) have been used extensively in structural applications within the aerospace and automotive manufacturing industries. However, several other applications have been recognized. These take advantage of the additional properties of CFRCs, which lead to providing better performance for structures. However, in their service environment, these CFRCs are inevitably susceptible to impact damage from multiple sources, and they must be able to recover from impacts to meet structural requirements. This study directs an experimental investigation of using induction heating (IH) for an impact-damaged CFRC. Here, IH process parameters, including the effects of electromagnetic frequency and generator power on the recovery of impact-damaged CFRC, have been analyzed. The anisotropic conductivity characteristics and the relationship between the drop-weight impact depth and conductivity of CFRC garnered much attention. This paper also offers the electromagnetic properties of CFRC for various applications. In this study, CFRC cured samples were obtained from Cetex® TC1200 PEEK, AS4 145 gsm, 16 unidirectional plies. Three variants of CFRC samples were tested: undamaged samples; samples with impact damage introduced in the center by a drop-weight impact test, according to the ASTM D7136/7136M standard; and samples with drop-weight impact damage recovered using the IH system. This work presents the results of the tensile strength of CFRC samples to assess the comparison of undamaged samples, samples damaged after the drop-weight impact test, and samples recovered after the drop-weight impact test. IH is appropriate for the recovery of impact-damaged CFRC samples, aiding in the conversion of electromagnetic energy to heat in order to generate mechanisms on components to recover the impact-damaged CFRC samples. Experimental results show that the impact-damaged area of the recovered CFRC samples is 37.0% less than that of damaged CFRC samples, and tensile strength results also improved after the impact-damaged CFRC samples were recovered. These results show that the IH method can effectively improve the impact damage performance of CFRC. The outcome of this study is promising for use in many applications, especially in the aerospace and automotive industries.

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