The effect of strain rate and temperature on the mechanical properties of polycarbonate composites

Krausz, Tamas; Şerban, Dan Andrei; Negru, Radu; Radu, Adrian G.; Marșavina, Liviu

doi:10.1016/j.matpr.2020.12.121

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…In order to understand better the material behavior and to ensure the material model's reliability, the material cards used for the correlations were based on the findings of the quasi‐static investigations done previously, 10 as part of a comprehensive study conducted for the proposed polycarbonate grades. The corresponding experimental plan for the impact characterization is briefly summarized in Figure 7.…”

Section: Numerical Modelingmentioning

confidence: 99%

Charpy impact properties and numerical modeling of polycarbonate composites

Krausz

Ailinei

Galatanu

et al. 2021

Mat Design & Process Comms

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Polycarbonate composites are widely spread in many industries, for product manufacturing. Although these materials are being used with high fidelity, their mechanical properties will highly depend on manufacturing processes, fiber orientations with respect to external loads, type of loading, environmental conditions, and so forth. This paper presents the Charpy impact behavior of three polycarbonate grades, in notched and unnotched conditions, as follows: Makrolon 2405—unreinforced polycarbonate, Makrolon 9415—polycarbonate with 10% glass fiber, and Makrolon 8035—polycarbonate with 30% glass fiber. The experimental measurements clearly demonstrated the effect of the fiber content on the impact strength of the material: as the fiber ratio increases, the impact strength decreases, exhibiting brittle behavior. The impact characterization of the notched specimens can facilitate the material selection for applications with higher geometrical complexities, where stress concentrators cannot be eliminated. In addition, the material models obtained through correlations could help increase simulation accuracy and speed up product development cycles.

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Section: Numerical Modelingmentioning

confidence: 99%

Charpy impact properties and numerical modeling of polycarbonate composites

Krausz

Ailinei

Galatanu

et al. 2021

Mat Design & Process Comms

Self Cite

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“…Polycarbonate (PC) is an amorphous polymer 1 with viscoelastic properties 2 which offers high resistance 3 to impact 4 and perforation 5 . PC has been utilized as a structural material 6 due to its extreme impact strength 7 , 1 Elenchezhian, M. R. P. (2015). Structural Analysis Of Lexan Polycarbonate.…”

Section: Introductionmentioning

confidence: 99%

“…International Journal of Impact Engineering, 38 (10), 804-814. 6 Cao, K., Wang, Y., & Wang, Y. (2014).…”

Section: Introductionmentioning

confidence: 99%

Forensic Significance of Perforation Pattern In Polycarbonate Sheet Against 9 × 19mm Projectile

Prajapati¹,

Rohatgi²,

Kumar³

2022

Preprint

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Polycarbonate is widely used as structural material due to its extreme resistance to impact and perforation. In a crime involving firearms, the bullet may impact various objects fitted with or made of polycarbonate sheets leaving high chances of discovering the fractured PC sheets and fragments at the scene of crime hence these objects may become objects of the criminal investigation. In the present work the perforation pattern of PC sheets of thicknesses 8mm, 10mm, 12mm and 15mm at firing ranges 5m and 10m when impacted against 9×19mm Full Metal Jacket (FMJ) bullet were examined. It was observed that after impact the PC sheet develops entry hole smaller than the calibre of bullet; formation of crack zone, plastic zone; and petalling on the distal face were observed. It was found that as the thickness of the sheet increases, the diameter of the entry hole increases. The diameter of the exit hole initially increases and then becomes constant. At 5m range of fire the trend of crack zone becomes nearly constant from 8mm to 15mm thickness, however, at 10m range of fire crack zone increases from 8mm to 15mm thickness. Furthermore, the diameter of plastic zone increases as the thickness of the sheet increases (from 8mm to 15mm respectively).

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“…The increasing demand for FFF manufactured parts with engineering grade polymers such as polycarbonate (PC) and thermoplastic polyurethane (TPU) has further increased the necessity for a study on the strain rate sensitivity of these polymers, which has not been reported before in literature. PC is a well-known high mechanical performance polymer [37], widely used in many applications which require strong dynamical properties, such as automotive [38], medical [39][40][41][42] and optics [43] applications. In AM, PC applications are still limited in the literature, with research mainly related to acoustic applications [44] and heat pipes [45].…”

Section: Introductionmentioning

confidence: 99%

“…The strain rate of these materials has been studied either for homopolymers or for composites [ 38 , 56 , 57 ], but not for parts built with AM technology. The manufacturing of parts through FFF technology requires the extrusion of melted-state polymer in shells, infills and, of course, in consecutive layers [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Strain Rate Sensitivity of Polycarbonate and Thermoplastic Polyurethane for Various 3D Printing Temperatures and Layer Heights

et al. 2021

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In this work, strain rate sensitivity was studied for 3D-printed polycarbonate (PC) and thermoplastic polyurethane (TPU) materials. Specimens were fabricated through fused filament fabrication (FFF) additive manufacturing (AM) technology and were tested at various strain rates. The effects of two FFF process parameters, i.e., nozzle temperature and layer thickness, were also investigated. A wide analysis for the tensile strength (MPa), the tensile modulus of elasticity (MPa), the toughness (MJ/m3) and the strain rate sensitivity index ‘m’ was conducted. Additionally, a morphological analysis was conducted using scanning electron microscopy (SEM) on the side and the fracture area of the specimens. Results from the different strain rates for each material were analyzed, in conjunction with the two FFF parameters tested, to determine their effect on the mechanical response of the two materials. PC and TPU materials exhibited similarities regarding their temperature response at different strain rates, while differences in layer height emerged regarding the appropriate choice for the FFF process. Overall, strain rate had a significant effect on the mechanical response of both materials.

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The effect of strain rate and temperature on the mechanical properties of polycarbonate composites

Cited by 10 publications

References 14 publications

Charpy impact properties and numerical modeling of polycarbonate composites

Charpy impact properties and numerical modeling of polycarbonate composites

Forensic Significance of Perforation Pattern In Polycarbonate Sheet Against 9 × 19mm Projectile

Strain Rate Sensitivity of Polycarbonate and Thermoplastic Polyurethane for Various 3D Printing Temperatures and Layer Heights

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