Experimental investigation on mechanical properties and failure mechanisms of polymer composite-metal hybrid materials processed by direct injection-molding adhesion method

Li, Lijun; Sun, Lingyu; Dai, Zongmiao; Xiong, Zhenkai; Huang, Bolong; Zhang, Yiben

doi:10.1016/j.jmatprotec.2018.08.039

Cited by 22 publications

(8 citation statements)

References 19 publications

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“…The sampling rate of the high-speed camera was set to be 5000, 50,000, 90,000, 120,000, and 135,000 frames per second, respectively. This method had been proved to be an efficient strain recording method for composites [22,[29][30][31][32][33]. The post-processing analysis of all the measurement results was conducted with the DIC professional software (VIC 2D 6, Correlated Solutions Inc., Irmo, SC, USA).…”

Section: Tensile Testing Methodsmentioning

confidence: 99%

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Cui

Wang

et al. 2019

Polymers

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Long glass fiber reinforced thermoplastic composites have been increasingly used in automotive parts due to their excellent mechanical properties and recyclability. However, the effects of strain rates on the mechanical properties and failure mechanisms of long glass fiber reinforced polypropylene composites (LGFRPPs) have not been studied systematically. In this study, the effects of strain rates (from 0.001 s−1 to 400 s−1) on the mechanical properties and failure mechanism of LGFRPPs were investigated. The results showed that ultimate strength and fracture strain of the LGFRPPs increased obviously, whereas the stiffness remained essentially unchanged with the strain rates from low to high. The micro-failure modes mainly consisted of fibers pulled out, fiber breakage, interfacial debonding, matrix cracking, and ductile to brittle (ductile pulling of fibrils/micro-fibrils) fracture behavior of the matrix. As the strain rates increased, the interfacial bonding properties of LGFRPPs increased, resulting in a gradual increase of fiber breakage at the fracture surface of the specimen and the gradual decrease of pull-out. In this process, more failure energy was absorbed, thus, the ultimate strength and fracture strain of LGFRPPs were improved.

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Section: Tensile Testing Methodsmentioning

confidence: 99%

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Cui

Wang

et al. 2019

Polymers

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“…Injection molding is a common process for the shaping of thermoplastics [ 1 , 2 , 3 ], thermoplastic elastomers [ 4 , 5 , 6 ], composites [ 7 , 8 , 9 ], as well as metals [ 10 , 11 , 12 ] and ceramics [ 13 , 14 ]. The central concept around the method is the melting and plasticization of the material and feeding it into a mold cavity, where the material is solidified by cooling [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

2021

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Soft robotics and flexible electronics are rising in popularity and can be used in many applications. However, there is still a need for processing routes that allow the upscaling in production for functional soft robotic parts in an industrial scale. In this study, injection molding of liquid silicone is suggested as a fabrication method for sensorized robotic skin based on sensor fiber composites. Sensor fibers based on thermoplastic elastomers with two different shore hardness (50A and 70A) are combined with different silicone materials. A mathematical model is used to predict the mechanical load transfer from the silicone matrix to the fiber and shows that the matrix of the lowest shore hardness should not be combined with the stiffer fiber. The sensor fiber composites are fixed on a 3D printed robotic finger. The sensorized robotic skin based on the composite with the 50A fiber in combination with pre-straining gives good sensor performance as well as a large elasticity. It is proposed that a miss-match in the mechanical properties between fiber sensor and matrix should be avoided in order to achieve low drift and relaxation. These findings can be used as guidelines for material selection for future sensor integrated soft robotic systems.

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“…The bonding strength between the two materials depends on the injection parameters and roughness and chemical coating of metallic surface. 7,8 To improve the bonding strength between these two materials, state-of-the-art concepts are applied to micro/nano-structures on the surface of inserted metallic parts for mechanical interlocking. 5,9–11 Furthermore, carbon nanotube (CNT)-reinforced epoxy adhesives between the abraded aluminum parts can improve the fatigue life and bonding strength.…”

Section: Introductionmentioning

confidence: 99%

A novel joining method by using carbon nanotube-based thermoplastic film for injection over-molding process

Matsumoto

Ishikawa

Tanaka

2019

Journal of Reinforced Plastics and Composites

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Hybrid thermoplastic composites are getting attention in light weight applications. The manufacturing process of hybrid composites is that discontinuous fiber-reinforced thermoplastics are injected onto the textile-reinforced thermoplastics through injection over-molding. The key topic of this process is to achieve a reliable interfacial bonding strength, which has a strong dependence on the molding conditions. As a novel approach, we adopted a carbon nanotube-based thermoplastic film to make nanoscale interconnections between different layers by inserting films between the layers. In this work, the following influences were investigated with respect to the interlaminar shear strength by short beam shear test: the (i) existence, (ii) dispersion state, (iii) concentration of carbon nanotubes, and (iv) injection over-molding conditions. Furthermore, the delaminated surface after short beam shear test was assessed via SEM observation. Consequently, polypropylene-injected hybrid composite with 1 wt% carbon nanotubes exhibited a 52% increase in interlaminar shear strength compared with the specimen without carbon nanotubes. Additionally, the combination of short carbon fibers, which were filled in injected polypropylene, and carbon nanotubes drastically enhanced the interlaminar shear strength. The optimization of carbon nanotube dispersion and molding condition provides strong improvement of interlaminar shear strength. However, excessive addition of carbon nanotube deteriorates the interlaminar shear strength.

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Experimental investigation on mechanical properties and failure mechanisms of polymer composite-metal hybrid materials processed by direct injection-molding adhesion method

Cited by 22 publications

References 19 publications

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

A novel joining method by using carbon nanotube-based thermoplastic film for injection over-molding process

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