Direct injection molding and mechanical properties of high strength steel/composite hybrids

Zhang, Yiben; Sun, Lingyu; Li, Lijun; Huang, Bolong; Wang, Taikun; Wang, Yantao

doi:10.1016/j.compstruct.2018.11.035

Cited by 16 publications

(9 citation statements)

References 28 publications

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“…With rapid developments in automobiles, medical equipments, electrical appliances, and machinery industries, application scope of polyamides, owing to their excellent mechanical properties and high strength, has widely increased. [1][2][3][4][5][6][7] PA66 has excellent wear resistance, high mechanical strength, and heat resistance. However, PA66, an aliphatic polyamide, has glass transition temperature (T g ) of only 70 C. A low glass transition temperature and a large drop in modulus above T g , limit its applications in many fields.…”

Section: Introductionmentioning

confidence: 99%

Improved processability ofPA66‐polyimidecopolymers with different polyimide contents

Tang

Wang

et al. 2020

J of Applied Polymer Sci

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Limitations in the properties of polyamide PA66, such as low glass transition temperature and high water absorptivity, limit its applications. Introduction of amorphous polyimide segments into the PA66 main chain lowers the glass transition temperature and melting temperature and also improves its processability. PA66-polyimide (PA-PI) copolymers with different weight ratios of PI are prepared by high temperature and high-pressure solution polymerization. The degree of crystallization of PA-PI copolymers decreases with increasing PI content. The melting point decreases from 261 C for PA66 to 223 C for PA-PI-4. Dynamic mechanical analysis shows that the T g increases from 70 to 90 C, and the storage modulus can be well maintained. Rheological studies show that the temperature for processing can reach 70 C. Copolymers with different PI contents show different processing viscosities. In addition, water absorptivity (about 1.8%) and dielectric constant values of PA-PI and PA6/6T are similar.

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Section: Introductionmentioning

confidence: 99%

Improved processability ofPA66‐polyimidecopolymers with different polyimide contents

Tang

Wang

et al. 2020

J of Applied Polymer Sci

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“…The press and injection hybrid molding produced penetration of the laminate into rib structure and the thick laminate experienced gradual temperature decrease due to its greater heat capacity. Zhang et al 15 observed a dominant role of interface in the failure process of the direct injection molded specimens of high strength steel and short glass fiber/PA66 subjected to tensile, bending, and, modes I and II fracture loading. Wang et al 16 observed improvement of interface elastic modulus up to 130% by preheating of continuous fiber/PA6 laminates at 150 C prior to injection over-molding.…”

Section: Introductionmentioning

confidence: 99%

Influence of preheating on the fracture behavior of over-molded short/continuous fiber reinforced polypropylene composites

Anandakumar

Timmaraju

Ramachandran

2021

Journal of Composite Materials

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Over-molded composites (consist of short and continuous fiber composites) have been extensively used in automotive structures because of their lightweight, high strength-to-weight ratio, and ability to make complex profiles. However, the poor interfacial bonding between short and continuous fiber composites reduces the performance of the over-molded composites. The preheating process has been utilized to enhance the interface bond of the over-molded composites. In the present study, the influence of preheating on the fracture behavior was studied by conducting tensile, flexural, short beam shear, mode I and mode II interlaminar fracture tests on over-molded short/continuous fiber polypropylene composites. The experimental results of the preheated specimens demonstrated an enhancement of tensile, flexural and short beam shear strength by 15%, 221% and 17%, respectively, compared with non-preheated specimens. Further, preheating enhanced the mode I and mode II interlaminar propagation fracture toughness by 655% and 44%, respectively compared with non-preheated specimens.

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“…Traditionally, the manufacturing process of blended composite materials and laminated composite materials is different. The former is mostly injection molding, 11 and the latter is mostly compression molding. 12 On the other hand, in recent years, fused deposition modeling (FDM) 3D printing has become an important processing method to study and analyze the enhancement mechanism of thermoplastic composites.…”

Section: Introductionmentioning

confidence: 99%

Study on performance characteristics of fused deposition modeling 3D‐printed composites by blending and lamination

Shi

Chen

Tuo

et al. 2020

J of Applied Polymer Sci

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Component contacting degree in a composite material is an important reference for evaluation the performance characteristics. In this article, two composite material systems involving polylactic acid (PLA) with acrylonitrile butadiene styrene (ABS) and PLA with thermoplastic polyurethane (TPU) were prepared by blending and laminating through fused deposition modeling (FDM) 3D printing technology. The mechanical and thermal properties of the as-prepared composite materials were examined. The results indicated that PLA and TPU played a dominant role in tensile strength and breaking elongation, respectively, in individual composite material. ABS and TPU changed the glass transition peek, crystallinity, and modulus of PLA. The results also suggested that although the processing design of the blending method was more suitable for the contact between two components, but the mechanical properties of laminated composites were closer to theoretical predictions. The structural design and processing technology provide a comparative method and reference basis for studying the performance characteristics of composite materials.

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Direct injection molding and mechanical properties of high strength steel/composite hybrids

Cited by 16 publications

References 28 publications

Improved processability ofPA66‐polyimidecopolymers with different polyimide contents

Improved processability ofPA66‐polyimidecopolymers with different polyimide contents

Influence of preheating on the fracture behavior of over-molded short/continuous fiber reinforced polypropylene composites

Study on performance characteristics of fused deposition modeling 3D‐printed composites by blending and lamination

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