WITHDRAWN: Analytical and numerical investigation of buckling load of functionally graded materials with porous metal of sandwich plate

Njim, Emad Kadum; Bakhy, Sadeq H.; Al-Waily, Muhannad

doi:10.1016/j.matpr.2021.03.557

Cited by 12 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tensile test is carried out to find mechanical properties according to ASTM. Hence, standard specimens for PLA and TPU material are used as raw materials in 3D printing machines to make structural foam, depending on ASTM D638 for plastic materials [44,45]. Two types of samples adopted rigid and non-rigid plastic specimens for the record, as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Raad

Njim

Jweeg³

et al. 2023

Phys. Chem. Solid St.

View full text Add to dashboard Cite

This work attempts to replace the sandwich core's traditional shape and material with a cellular pattern, where the cells have a regular shape, distribution, and size. The contribution of this paper is to design two structures, one open-celled and the other closed, and to evaluate the performance of sandwich plates with lattice cell core as it is used for many industrial applications, particularly in automobile engineering. The new theoretical formulations are constructed for two structures to find the free vibration characteristics. The results of the new design are compared with the traditional shape. Derivation of equations to predict mechanical properties based on relative density with the chosen shapes, specific vibration equation of three-layer sandwich plate, and substitution by equation using excel sheet. Results are promising, and the effectiveness of cellular pattern theoretical analysis estimation. Limitations and error rates for the mechanical properties come through the empirical equations, and their ratio to the relative density values are higher depending on the behavior of the core material. Findings reveal, with open cell decrease in modulus of elasticity by (PLA: -90.4%) and (TPU: -90.4%), increases natural frequency by (PLA: 44.5%) and (TPU: 46.4%), as for closed-cell decreases in the modulus of elasticity by (PLA: -66.9%) and (TPU: -64.4%), increases natural frequency by (PLA: 36%) and (TPU: 37.7%). Converting a solid substance or replacing a foam form with a cellular pattern is one way to better performance and save weight through the selected cell pattern in absorbing the energy of the vibration wave.

show abstract

Section: Resultsmentioning

confidence: 99%

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Raad

Njim

Jweeg³

et al. 2023

Phys. Chem. Solid St.

View full text Add to dashboard Cite

show abstract

Thermo‐mechanical nonlinear stability analysis of geometrically imperfect functionally graded plates with microstructural defects using logarithmic structure kinematics: An unified expression

Rajput

Gupta

2022

Z Angew Math Mech

View full text Add to dashboard Cite

In the present paper, thermo‐mechanical stability analysis of geometrically imperfect porous functionally graded plates (FGP) with geometric nonlinearity is presented. The equilibrium, stability, and compatibility equations are derived using Logarithmic structural kinematics in conjunction with the von‐Karman type of geometric nonlinearity. A logarithmic‐based shear‐strain function has been used for the first time for the buckling response of functionally graded material (FGM) plates. Generic imperfection function has been implemented to incorporate the various imperfection modes like sin‐type or global type in the formulation. The effective materials properties of the plates with porosity inclusion have been computed using modified power law. The plate is subjected to uniaxial and biaxial compression as well as combined compression and tension along with thermal loading. An exact expression for the critical buckling load and critical buckling thermal load of geometrically imperfect porous FGM plate for each loading case has been developed. After confirming the excellent accuracy of the current exact solutions, the effect of geometric imperfection, porosity inclusion, and geometric configurations on the nonlinear stability of the FGM plate have been discussed extensively. The results presented in this paper will be used as a benchmark for future research.

show abstract