Effect of Processing Parameters on the Dynamic Characteristic of Material Extrusion Additive Manufacturing Plates

Abstract

Material extrusion (ME), an additive manufacturing technique, can fabricate parts almost without geometrical limitations. With the growing application of ME parts, especially in actual working conditions, the dynamic characteristics are needed to be studied to accurately determine their reliability. This study provides an experimental validation of the theoretical model for predicting the dynamic characteristics of ME plates fabricated with three different key processing parameters, i.e., extrusion width, layer height and build direction. The model is set up based on the bidirectional beam function combination method, and a series of experimental tests are performed. It is found that different processing parameters result in the material properties of the samples to vary, thus leading to different dynamic characteristics. Through the comparison between predictions and measurements, it is shown that the influencing trend of the processing parameters is predicted precisely. The theoretical model gives reliable predictions in dynamic characteristics of ME plates. The natural frequency discrepancy is below 13.4%, and the predicted mode shapes are the same as the measured ones. This present work provides theoretical basis and technical support for further research in improving the dynamic performance of ME products, and helps extend the applications of this technique.

A dynamic model of laminated material extrusion additive manufacturing plate with the property of orthogonal anisotropy

“…The tensile tests, according to ISO 527–2-2012 standard, were carried out on the tensile test samples using the testing machine (Shimadzu EHF-EV200k2-040, as shown in Figure 5). Based on Hooke’s law, the samples’ elastic modulus can be obtained (Jiang et al , 2019).…”

Frequency and deflection responses of 3D‐printed carbon fiber reinforced polylactic acid composites: Theoretical and experimental verification

“…The validity of the model was verified by testing polymeric samples using a portable digital vibrometer. The effect of layer width, layer height, and build direction on the dynamic properties of 3D‐printed PLA samples was studied by Jiang et al [ 22 ] They came to the conclusion that the variations in the parameters altered the samples' shear modulus and elastic modulus. Mansour et al [ 23 ] studied the mechanical and dynamic properties of with and without graphene reinforced with 3D printed PLA.…”

“…The graphene reinforced with PLA increases the loss factor from 0.122 to 0.18 and the modulus of elasticity from 2684 to 3767 MPa. Jiang et al [ 22 ] studied the effect of processing factors such as layer height, extrusion width, and build direction on dynamic properties of 3D printed PLA materials. Experimental vibration analysis was done on PETG materials in our prior work, [ 24 ] and the influence of blending on vibration parameters was described.…”

Improving the surface quality of material extrusion additive manufacturing parts by using ultrasonic‐vibration machining

“…1,2 Thanks to the advantages of low cost, simple operation, resource saving, and so forth, it has been widely applied in many fields, such as art and design, dentistry, electronic and automotive. [3][4][5] However, limited to the manufacturing mechanism, ME parts have obvious defects in terms of surface quality, 6 which affects their friction performance and matching accuracy. Therefore, plenty of scholars have conducted exploration and research on how to enhance the ME parts' surface quality.…”