Abstract
In this paper, a simulation method based on an orthogonal anisotropic material is proposed. A numerical example using a simple plate is presented to show the difference in the static performance between the orthogonal anisotropic and the isotropic models. Comparing with the tested modal data of a diesel engine oil cooler cover made by glass fiber reinforced polyamide 66 (PA66), the proposed simulation method was confirmed to be much closer to reality than the general isotropic model. After that, a comprehensive performance comparison between the plastic oil cooler covers with the orthogonal anisotropic and the isotropic fiber orientations was carried out including a static deformation and stress analysis under a pressure-temperature coupled load, a forced response analysis, and an acoustic analysis under real operating conditions. The results show that the stress, the deformation, the peak vibration velocity, and the overall sound power level of the orthogonal anisotropic model are different from that obtained with the isotropic model. More importantly, the proposed method can provide a much more detailed frequency content compared to the isotropic model.
Highlights
Glass fiber reinforced thermoplastics are increasingly used in manufacturing [1,2,3]
Based onon thethe injection results,the theFEFEmodel model of the oil cooler was divided groups consisted of blocks according to the fiber orientation distribution, as shown in
The fiber orientation varies with different groups
Summary
Glass fiber reinforced thermoplastics are increasingly used in manufacturing [1,2,3]. De Monte et al [18] studied the anisotropic behavior of the mechanical properties of short glass fiber reinforced polyamide 66 (PA66-GF35) under quasi-static loading. Apart from the mechanical properties of the glass fiber reinforced thermoplastics, fiber orientation influences the thermal behavior of the material. Since the mechanical performance of fiber reinforced plastics varies with fiber orientation and structure geometry, simulations using isotropic and anisotropic materials would give very different results both in static analysis and in dynamic analysis. An orthogonal anisotropic material simulation method was proposed and applied to a plastic oil cooler cover made of glass fiber reinforced PA66 in order to find out the effect of the orthotropic characteristics on the mechanical, thermal, vibration, and acoustic behaviors of the components. According to the loading conditions obtained from the computational fluid dynamics (CFD) calculation, the static and dynamic performances of the oil cooler cover were compared with that of the isotropic material and discussed in detail
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