Effect of axial compression on dynamic response of concurrently printed sandwich

Bharath, H. S.; Waddar, Sunil; Bekinal, Siddappa Iranna; Pitchaimani, Jeyaraj; Doddamani, Mrityunjay

doi:10.1016/j.compstruct.2020.113223

Cited by 21 publications

(6 citation statements)

References 69 publications

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“…A literature survey showed that most studies on buckling and vibration analyses have been performed on beams developed using the hand layup method (Waddar et al , 2019). Very few attempts have been made to study the buckling behavior of 3D printed plain (unfilled/non-reinforced and nongraded) beams (Bharath et al , 2021b). The density and P cr values of 3D printed functionally graded sandwich beams were compared with those of beams developed using the hand layup method and 3D printed plain beams using the property chart shown in Figure 14.…”

Section: Property Chartmentioning

confidence: 99%

“…Moreover, the strength of the skin–core interface plays a vital role in enhancing the properties of the sandwich structure. Therefore, if sandwich structures are developed concurrently (skin–core–skin processing), inherent failures can be eliminated (Bharath et al , 2021b). Hence, the current work is focused on opening a new avenue for developing FG foam sandwiches using fused filament fabrication (FFF).…”

Section: Introductionmentioning

confidence: 99%

“…Composites which are developed by reinforcing the hollow particles in matrix are called as syntactic foams (Gupta et al , 2010). Mostly cenosphere and glass microballoon (GMB) are used as the reinforcement in developing syntactic foams (Patil et al , 2019; Bharath et al , 2021b). These fillers are not only used in developing syntactic foams but also in wide variety of industries, for example, cenospheres are used in applications like thermal barrier coatings (Chavana and Bhajantri, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic response of 3D printed functionally graded sandwich foams

Bonthu,

H.S.,

Bekinal

et al. 2023

RPJ

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Purpose The purpose of this study was to introduce three-dimensional printing (3DP) of functionally graded sandwich foams (FGSFs). This work was continued by predicting the mechanical buckling and free vibration behavior of 3DP FGSFs using experimental and numerical analyses. Design/methodology/approach Initially, hollow glass microballoon-reinforced high-density polyethylene-based polymer composite foams were developed, and these materials were extruded into their respective filaments. These filaments are used as feedstock materials in fused filament fabrication based 3DP for the development of FGSFs. Scanning electron microscopy analysis was performed on the freeze-dried samples to observe filler sustainability. Furthermore, the density, critical buckling load (Pcr), natural frequency (fn) and damping factor of FGSFs were evaluated. The critical buckling load (Pcr) of the FGSFs was estimated using the double-tangent method and modified Budiansky criteria. Findings The density of FGSFs decreased with increasing filler percentage. The mechanical buckling load increased with the filler percentage. The natural frequency corresponding to the first mode of the FGSFs exhibited a decreasing trend with an increasing load in the pre-buckling regime and an increase in post-buckled zone, whereas the damping factor exhibited the opposite trend. Originality/value The current research work is valuable for the area of 3D printing by developing the functionally graded foam based sandwich beams. Furthermore, it intended to present the buckling behavior of 3D printed FGSFs, variation of frequency and damping factor corresponding to first three modes with increase in load.

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Section: Property Chartmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic response of 3D printed functionally graded sandwich foams

Bonthu,

H.S.,

Bekinal

et al. 2023

RPJ

Self Cite

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“…Improving axial compression performance of carbon fiber itself is more effective in increasing compressive strength of the composites due to carbon fibers acts as the load-bearing components in the composites. [13][14][15][16] Recently more attention was paid in the axial compressive performance of carbon fibers. [17] Ueda et al used direct scanning electron microscope to observe of the compression failure behavior of carbon fiber, and structure and compression performance was established.…”

Section: Introductionmentioning

confidence: 99%

Direct measurement of axial compressive strength of carbon fibers using multifilament method

2022

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To measuring the compressive strength of carbon fibers accurately and effectively, a specially designed fixture was applied for directly measuring axial compressive strength of carbon fibers using T800HB‐12 K multifilament. Influence of adhesive thickness and specimen length on the testing results was investigated. Adhesive of epoxy effectively transferred compressive stress from the fixture to the specimen and provided enough support of multifilament rod from bending during compressive load. Typical shear failure for multifilament rod was realized for T800HB‐12 K carbon fibers during compression testing using the purposely designed fixture at adhesive thickness of 0.101–0.110 mm and test length of 2.0–3.0 mm. Compressive strength of about 2700 MPa with variation coefficient of 8% was obtained for T800HB‐12 K carbon fibers. The fixture and method established were capable for characterizing axial compressive strength of 1–24 K carbon fibers.

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“…47,48 Subsequently, a lot of research has started to develop a new generation of microstructures: functionally graded sandwich plates. [49][50][51] Different theories have been used to analyze FGM plates. The effects of transverse shear and normal strain are ignored in classical plate theory.…”

Section: Introductionmentioning

confidence: 99%

Impact of rotating magnetic field on the microstructure, thermal properties, and creep behavior during the solidification of Sn–2.0Ag–0.5Cu solder alloy

Hammad

El-Molla

Ragab

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Recently, the application of the magnetic field during the solidification process of alloys has become of great interest, owing to its ability to enhance microstructures. Hence, the present work aims to study the impact of a rotating magnetic field on the microstructure, thermal, and creep properties of the Sn–2.0Ag–0.5Cu (SAC205) alloy during solidification. Results demonstrated that applying a rotary magnetic field homogenized the distribution of intermetallic compounds and improved the microstructure. Additionally, the magnetic field diminished undercooling from 22.5 oC to 11.4 oC, indicating that the magnetic field is very useful in enhancing the microstructure and the alloy’s reliability. The pasty range values for SAC205 and SAC205-B were 7.2 oC and 8.6 oC lower than 11.0 oC for lead-tin, leading to a reduction of the alloy porosity. The SAC205-B alloy exhibited the longest creep rupture time of 158.5% compared to the SAC205. The n values of SAC205-B were higher than those of SAC205. Consequently, the SAC205-B alloy displayed the highest creep resistance and lowest creep rate (28.53%) compared to the SAC205. The Q values were 51.2 and 67.5 kJ/mol for SAC205 and SAC205-B, respectively, controlled by pipe diffusion. This research will provide practical advice for the manufacture of the solder alloy.

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Effect of axial compression on dynamic response of concurrently printed sandwich

Cited by 21 publications

References 69 publications

Dynamic response of 3D printed functionally graded sandwich foams

Dynamic response of 3D printed functionally graded sandwich foams

Direct measurement of axial compressive strength of carbon fibers using multifilament method

Impact of rotating magnetic field on the microstructure, thermal properties, and creep behavior during the solidification of Sn–2.0Ag–0.5Cu solder alloy

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