Fatigue Crack Propagation in Short-Glass-Fiber-Reinforced Nylon 66: Effect of Frequency

Lang, R. W.; Manson, J. A.; Hertzberg, R. W.

doi:10.1007/978-1-4615-9293-8_21

Cited by 10 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, more significant consideration must be given to their design against fatigue failure. Some research has mentioned the fatigue strength of the weld line in the injection molding part when it stands by the stress [21][22][23][24][25][26][27][28][29][30]. However, in real applications, many plastic products will work under deformation, especially with the parts of microelectromechanical systems (MEMS).…”

Section: Introductionmentioning

confidence: 99%

Study on the Fatigue Strength of Welding Line in Injection Molding Products under Different Tensile Conditions

Minh

Nguyen

et al. 2022

Micromachines

View full text Add to dashboard Cite

The fatigue performance of polypropylene (PP) at various amplitudes and frequencies on fatigue cycles under tensile test conditions is investigated in this study. The results show that increasing the frequency leads to a decrease in fatigue cycles due to increased cycle time. The decline rate can be divided into two stages, between 1 and 5 Hz. The first stage rapidly decreases fatigue performance as the frequency increases from 1 Hz to 2 Hz or 3 Hz. The second stage has a lower reduction rate, which occurs between 2 Hz or 3 Hz and 5 Hz due to the strengthening effect of increasing frequency. Furthermore, increasing the amplitude from 0.1 mm to 0.4 mm reduces the fatigue cycle due to the higher deformation rate. In summary, expanding both amplitude and frequency reduces the fatigue performance of the PP material. Moreover, according to the scanning electron microscope microstructure, increasing the frequency results in more microcracks in the polymer matrix.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on the Fatigue Strength of Welding Line in Injection Molding Products under Different Tensile Conditions

Minh

Nguyen

et al. 2022

Micromachines

View full text Add to dashboard Cite

show abstract

“…On the contrary, some other polymers such as polycarbonate [37], and poly(vinylidene fluoride) [38] showed a very slight worsening of FCP rate with increasing test frequency. Concerning the frequency effect on the FCP behavior of short fiber reinforced polymers, limited experimental information exists [8,10,17,39].…”

Section: Effect Of Frequencymentioning

confidence: 99%

Fatigue Fracture of Neat and Short Glass Fiber Reinforced Polypropylene: Effect of Frequency and Material Orientation

Pegoretti

Riccò

2000

Journal of Composite Materials

View full text Add to dashboard Cite

ABSTRACT:The influence of glass fibers content and testing conditions (frequency and mean load) on the fatigue crack propagation rate in injection molded neat and fiber reinforced polypropylene has been investigated. The resistance to fatigue crack propagation increases as the fiber volume fraction increases. The fatigue resistance of either neat and fiber reinforced polypropylene is tremendously dependent on the crack propagation direction, with higher values for crack propagating transversely to the melt flow direction in the molded plaques. A dramatic increase of the crack growth rate per cycle by decreasing frequency, at any given crack length was found for all the materials investigated. Analysis of data obtained at various frequencies and applied mean loads suggests that crack propagation is determined mostly by viscoelastic creep processes at the crack tip, the role of pure fatigue appearing quite secondary.

show abstract

Structure and Fracture Mechanics of Injection‐Molded Composites

Karger‐Kocsis

2012

Wiley Encyclopedia of Composites

View full text Add to dashboard Cite

This article gives an overlook on the microstructural development and microstructure‐related fracture and fatigue behaviors of short and long discontinuous fiber‐reinforced injection‐molded composites. The fracture and fatigue crack propagation of the related composites were assessed by fracture mechanical concepts and interpreted as a function of molding‐induced microstructure. The failure caused by different test conditions was analyzed by fractography and discussed. Recommendations were given on how to design injection‐molded thermoplastic matrix composite parts by using the fracture mechanical data.

show abstract

Fatigue Crack Propagation in Short-Glass-Fiber-Reinforced Nylon 66: Effect of Frequency

Cited by 10 publications

References 14 publications

Study on the Fatigue Strength of Welding Line in Injection Molding Products under Different Tensile Conditions

Study on the Fatigue Strength of Welding Line in Injection Molding Products under Different Tensile Conditions

Fatigue Fracture of Neat and Short Glass Fiber Reinforced Polypropylene: Effect of Frequency and Material Orientation

Structure and Fracture Mechanics of Injection‐Molded Composites

Contact Info

Product

Resources

About