Low-Velocity Impact Characteristics of 3D-Printed Poly-Lactic Acid Thermoplastic Processed by Fused Deposition Modeling

Aloyaydi, Bandar Abdullah; Sivasankaran, S.

doi:10.1007/s12666-020-01952-6

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…Aloyaydi and Sivasankaran reported that an improved penetration limit velocity can be achieved in high-density PLA parts, allowing them to carry greater impact loads. This was considered to be owing to the increased strength, increased porosity, and strong bonding between the layers [28]. Similar increments are shown for the penetration limit velocities of the medium-density core (unit cell of 8 mm), i.e.…”

Section: Velocity With Respect To Timesupporting

confidence: 56%

Low-velocity impact behavior of sandwich composite structure with 3D printed hexagonal honeycomb core: varying core materials

Faissal¹,

Azaman²,

Majid³

et al. 2022

Funct. Compos. Struct.

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Additive Manufacturing (AM) technology is extensively used in aeronautical applications, especially in designing the sandwich composite structures for repair tasks. However, the composite structures are vulnerable to impact loadings because of their exposure to, for instance, loading field carriages, flying debris, and bird strikes. This may lead to crack propagation and ultimately the structural failure. Therefore, it is important to investigate the mechanical behaviour of sandwich composite structures under low–velocity impact. In this research, carbon fiber fabric reinforced 3D–printed thermoplastic composite of hexagonal honeycomb cores structures were fabricated with different unit cells (6, 8, and 10 mm) and varying materials (Polylactic acid (PLA), PLA–Wood and PLA–Carbon). A drop weight impact test was performed under impact energies (5, 8, and 11 J) to determine the energy absorption performance of the structures whereas the surface morphology was analysed using a high–intensity optical microscope. Comparing unit cells of materials used, it is observed that the unit cell of 8 mm is the best configuration for lightweight materials with impressive energy absorption capabilities. Under an impact energy of 11 J, the PLA–Wood of unit cell 8 mm shows 9.22 J higher in energy absorption than unit cell 10 mm which is 7.44 J due to intermediate stiffness that resists further deformation. While the filled PLA shows the PLA–Wood material offers better performance in energy absorption capability compared to PLA–Carbon. The PLA–Wood demonstrates 9.22 J more energy absorption for an unit cell 8 mm under an impact energy of 11 J than the PLA–Carbon, which is 8.49 J. This is due to the good compatibility between the hydroxyl groups of the polymer matrix and lignocellulose filler, which translates to better stiffness.

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Section: Velocity With Respect To Timesupporting

confidence: 56%

Low-velocity impact behavior of sandwich composite structure with 3D printed hexagonal honeycomb core: varying core materials

Faissal¹,

Azaman²,

Majid³

et al. 2022

Funct. Compos. Struct.

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“…The PLA-GF and PLA-CF exhibit tensile strengths ranging from 40.2 to 54.3 MPa and 47.2-65.5 MPa, respectively. Additionally, they demonstrate flexural strengths ranging from 90.5 to 105.6 MPa and 114-125 MPa, respectively [36,63,64].…”

Section: Methodsmentioning

confidence: 99%

Investigation on the Compressive Characteristics and Optimization of Design Parameters of a Novel Functionally Graded Cell Structure

Ganapathy,

Sakthivel

2024

Funct. Compos. Struct.

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Novel structural conceptualizations frequently incorporate inventive ideas, materials, or construction techniques. This study presents a unique design inspired by the traditional practice of sikku rangoli, a cultural tradition prevalent in the southern region of India, particularly in Tamil Nadu. Because it was novel, it was necessary to optimize the fundamental design for maximal outputs. In contrast to honeycomb structures, intercellular interactions are believed to contribute to the overall strengthening of the structure. By eliminating sharp corners from the structure, stress accumulation is prevented, resulting in improved stress distribution. Therefore, the design aspects that were deemed significant were taken into consideration and through the implementation of experimental design, an optimum design was determined. Utilizing the optimal base design as a foundation, the structure underwent several printing processes using diverse materials and incorporated multiple fillers. Furthermore, the structure was subjected to modifications employing the functional grading design concept. The study employed the functional grading design concept to examine the variations in load bearing capability, load distribution, and failure mode. The findings indicate that the compression strength of the composite structure was mostly influenced by the wall thickness. The combination of a carbon fiber reinforced base material with silicone rubber as filler, together with a functional graded cell structure featuring top and bottom densification, exhibited the highest compression strength compared to all other combinations. In order to investigate the accurate impact of the FG structures, every cell design was printed using PLA-CF, subjected to testing devoid of any additives, and the output parameters were computed. The results indicated that the center densified cell design exhibited significant values for specific energy absorption, relative density, and compressive strength (52.63 MPa, 0.652, and 2.95 kJ/kg, respectively). The design of the base cell exhibited the greatest crushing force efficacy of 0.982.

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“…Recently, it has been used frequently in industrial applications and biomedical fields. Some technical specifications of ABS, PLA and UVR materials are given in Table 1 (Aloyaydi and Sivasankaran, 2020;Kim et al, 2007;Turan et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

Comparison of Mechanical Properties of Samples Fabricated by Stereolithography and Fused Deposition Modelling

BAYRAKLILAR,

KUNCAN,

BULDU

et al. 2023

Journal of Materials and Mechatronics: A

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Additive manufacturing (AM) technology has attracted significant attention with the rapid fabri-cation of 3D parts for various applications. With fused deposition modeling (FDM) and stereo-lithography (SLA), the most used methods in this technology, it is possible to produce functional parts with complex shapes quickly and cheaply. Determining the mechanical properties of the parts produced by these methods is important in terms of efficient operation in the relevant fields. This study, 45 test specimens were fabricated using three different polymer materials (UVR, PLA, and ABS) in SLA and FDM type 3D printers, including tensile, compression, and 3-point bending tests. Samples are printed at a 75% fill rate according to ASTM standards. Experimental studies were carried out to determine the mechanical properties of the samples. Among the samples, the highest strength values in tensile, compression and bending test samples made of UVR material were 60.39 MPa, 127.74 MPa and 118.35 MPa, respectively. In addition to mechanical properties, hardness, and SEM analyses were performed to examine the surface roughness, surface topography, and composition of the samples. As a result, the effects on the mechanical properties of the samples fabricated by the UVR-based SLA method and the PLA-ABS-based FDM method were examined and compared.

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Low-Velocity Impact Characteristics of 3D-Printed Poly-Lactic Acid Thermoplastic Processed by Fused Deposition Modeling

Cited by 12 publications

References 17 publications

Low-velocity impact behavior of sandwich composite structure with 3D printed hexagonal honeycomb core: varying core materials

Low-velocity impact behavior of sandwich composite structure with 3D printed hexagonal honeycomb core: varying core materials

Investigation on the Compressive Characteristics and Optimization of Design Parameters of a Novel Functionally Graded Cell Structure

Comparison of Mechanical Properties of Samples Fabricated by Stereolithography and Fused Deposition Modelling

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