Abstract Composite materials undergo intricate damage processes, which are accentuated when these materials are exposed to impact loading conditions. In this context, this work aims to study the behavior of fiber reinforced polymer composites submitted to high strain rate in compression. A composite laminate plate was obtained using a plain weave carbon fiber fabric and an epoxy resin as matrix. The Split Hopkinson Pressure Bar (SHPB) technique was used to apply compressive loads at three different strain rates and in six different directions (0°, 15°, 30°, 45°, 60° and 75°) relative to the warp. The compressive failure modes were studied using a high speed camera to record the SHPB test. With increasing strain rates, it was possible to identify a transition from longitudinal cracking failure to delamination buckling failures. Similarly, the off-axis loading conditions (mainly for 45°) resulted in extension-shear coupling effects, which promoted the delamination buckling failures.
Abstract The fractographic aspects of compression failures remain inadequately explored, mainly due to the damages that the compressive load promotes on the fracture surfaces, which difficult the identification of fracture aspects. In addition, despite the large quantity of studies on the literature, there is no consensus concerning the existing compressive failure modes. Aiming to contribute in this research field, this paper has the objective of proposing a novel classification for the compres...
Abstract This paper is part of a series of fractographic studies on fiber-reinforced polymer composites submitted to compression, which attempts to fill the gap in the composite failure analysis. Here, the effect of the hygrothermal conditioning is assessed for composite laminates manufactured from a carbon fiber/epoxy resin prepregs, which used plain weave fiber arrangement. The laminate was trimmed into compression test specimens, according to the ASTM D3410 standard. After the test, the aspec...
#1Yan Tian(Center for Excellence in Education)H-Index: 1
#2Hui Zhang(Center for Excellence in Education)H-Index: 10
Last. Zhong Zhang(USTC: University of Science and Technology of China)H-Index: 61
view all 7 authors...
Abstract This work aimed to investigate the strain-rate effect (0.001–3000 s −1 ) on compressive properties of the highly cross-linked epoxy and the epoxy sample filled with 10 wt% sol-gel-formed silica nanoparticles. As the strain rate increased, the compressive modulus and transition strength of both samples went up distinctly, the strain at break and ultimate strength decreased more or less, while the strain energy at fracture nearly did not change. Adding the sol-gel-formed silica nanopartic...
Abstract The composite-structure protective systems in head-on collision with objects are largely subjected to dynamic compression load along the thickness of composite structure. A typical plain weave aramid fabric reinforced polyamide (PA) composite, which is defined as one of single polymer composites (SPCs), is addressed in this paper. Firstly, in the process of sample preparation, processing characteristics of the single polymer composites are skillfully achieved and discussed using differe...
Abstract The strain rate dependent mechanical behaviour was studied for the common out-of-autoclave aerospace textile composite 5-harness-satin carbon–epoxy. End-loaded 15 ° , 30 ° and 45 ° off-axis and 90 ° compression tests were carried out at three different strain rate levels ( 4 × 10 - 4 s - 1 , 200 s - 1 and 1000 s - 1 ) to determine the effect of strain rate for transverse compression and combined transverse compression/in-plane shear loading. The dynamic tests were carried out on a split...
Description based on print version record. ; Electronic reproduction. Palo Alto, Calif. : ebrary, 2014. Available via World Wide Web. Access may be limited to ebrary affiliated libraries. ; Electronic reproduction. Palo Alto, Calif. : ebrary, 2014. Availa
#2Zhihua Wang(TUT: Taiyuan University of Technology)H-Index: 33
Last. HaiJun Xuan(ZJU: Zhejiang University)H-Index: 1
view all 4 authors...
Abstract The compressive behavior of woven carbon/epoxy laminate composites is investigated under in-plane and out-of-plane loading. The Material Testing System (MTS) and the Split Hopkinson Pressure Bar (SHPB) are employed to test the quasi-static and high strain rate dynamic mechanical properties of the material, respectively. Dynamic compression properties are compared with those of static loading. It is observed that the failure strength varies with different fiber woven directions. The resu...
Abstract An investigation into the compressive and tensile behavior of a carbon fiber reinforced resin matrix composite at high strain rates is carried out using a split Hopkinson bar. All the dynamic tests are performed under the condition of stress equilibrium and constant strain rate. The results of the compressive tests show that the failure strength and strain of the composite increase with the increase of strain rate. A plateau is observed in a typical stress–strain curve which prompts fur...
Last. Ignace Verpoest(Katholieke Universiteit Leuven)H-Index: 75
view all 4 authors...
Abstract This paper presents a comprehensive experimental study and detailed mechanistic interpretations of the tensile behavior of one representative 3D non-crimp orthogonal woven (3DNCOW) carbon/epoxy composite. The composite is tested under uniaxial in-plane tensile loading in the warp, fill and ±45° bias directions. An “S-shape” nonlinearity observed in the stress–strain curves is explained by the concurrent contributions of inherent carbon fiber stiffening (“non-Hookean behavior”), fiber st...
#1Jiuzhou Zhao(HIT: Harbin Institute of Technology)H-Index: 2
#2Licheng Guo(HIT: Harbin Institute of Technology)H-Index: 27
Last. Zhixing Li(HIT: Harbin Institute of Technology)H-Index: 1
view all 6 authors...
Abstract The in-plane dynamic compressive behavior of a 2D twill weave carbon fiber reinforced composite was investigated using the split Hopkinson pressure bar (SHPB) apparatus. Constant strain rate loading was achieved with the adoption of pulse shapers within the experiments. A non-dimensional parameter was adopted to verify the stress equilibrium state of the specimens, which ensured the effectiveness of the experimental results. The upper limit of constant strain rate for the composite, whi...
In order to enhance the interfacial adhesion of carbon fiber (CF) and polymer matrix, a multiscale gradient modulus intermediate layer with rigid-flexible (GO-PA) hierarchical structure was designed and fabricated between CFs and matrix by a facile and businesslike strategy. The polarity, roughness and wettability of CFs surface as well as the thickness of intermediate layer in composite have been significantly increased after rigid-flexible hierarchical structure was constructed. The IFSS, ILSS...
Abstract This work presents an experimental study on the mechanical behaviour of thermoplastic polyarlyetherketone (PAEK) based composite laminates reinforced with woven carbon fibres, subjected to high strain rates under compression loading. The specimens were tested using a Split Hopkinson Pressure Bar (SHPB). The tests covered the working temperatures and stress envelopes of −54 °C, RT (25 °C), and 80 °C, each tested at six different off-axis angles. The high-speed imaging system was used to ...
Abstract PMC (Polymer Matrix Composites), in addition to static loads, can also be exposed to dynamic loads as a result of impacts. Aircraft or cars are particularly vulnerable to this type of loading, where small objects, e.g. pebbles, sand grains, and metal debris may hit. Such loads can cause cracking or lead to complete damage. Therefore, the paper presents research results for the most commonly used polymer composite reinforced with glass fibers (GFRP). For GFRP samples, hand lay-up laminat...
#1Ankur Chaurasia(IITR: Indian Institute of Technology Roorkee)H-Index: 5
#2Rahul S. Mulik(IITR: Indian Institute of Technology Roorkee)H-Index: 16
Last. Avinash Parashar(IITR: Indian Institute of Technology Roorkee)H-Index: 17
view all 3 authors...
The aim of this article is to review the solution and challenges associated with high strain rate behavior of nanocomposites. Nanoclay, carbon nanotube, graphene, and inorganic nanofillers are most...
Tensile tests were assessed to evaluate the ageing effects on carbon fiber/epoxy resin laminates exposed to ozone and water immersion. Laminates with distinct fiber arrangements (unidirectional - U...
Abstract In many practical situations, composite structures are often subjected to complex impact loadings ranging from low to high strain rates. Therefore, it is necessary to characterize the mechanical performance of composite materials at different strain rate. In this paper, carbon fiber-reinforced epoxy laminates with different stacking sequences and ply orientations under dynamic impact loadings were investigated by split Hopkinson pressure bar (SHPB) apparatus. Dynamic results were compar...
Abstract The mechanical performance of continuous large tow carbon fiber reinforced polyamide 6 laminates fabricated by hot press molding was studied using quasi-static and dynamic tests. The effects of layup, strain rate and high temperature were discussed. The results show that the thermoplastic composites possess strain rate strengthening effects and high temperature weakening dependence. Different layup laminates exhibit different sensitivities. The elastic modulus difference of unidirection...
Last. Amit Rai Dixit(IITs: Indian Institutes of Technology)H-Index: 25
view all 3 authors...
In this review, recent progress in the mechanical, thermal and interfacial properties of graphene/CNT multiphase polymer composites is examined. Progress in the mechanical and thermal properties of CNT (1D) and graphene (2D) nanostructure materials is also reviewed and compared. Furthermore, this review highlights the improvements in the mechanical, thermal and interfacial properties of two- and three-phase composites, owing to the addition of graphene/CNT. In particular, analysis of several not...