Weight reduction by topology optimization of an engine subframe mount, designed for additive manufacturing production

Merulla, Andrea; Gatto, Andrea; Bassoli, Elena; Munteanu, Sorin Ion; Gheorghiu, Bogdan; Pop, Mihai Alin; Bedő, Tibor; Munteanu, Daniel

doi:10.1016/j.matpr.2019.08.015

Cited by 38 publications

(13 citation statements)

References 16 publications

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“…Nowadays, it is mainly pursued thought two different methods: additive manufacturing (AM) and metal-to-PMC replacement. Weight reduction could be easily achieved by topological optimization of components [1]. Moreover, the creation of component with more than one function (for example cooling system and crash absorbers [2]) could be more and more explored in the really next future.…”

Section: Introductionmentioning

confidence: 99%

Influence of Freeze-Thaw Aging on the Impact Performance of Damped Carbon Fiber Reinforced Plastics for Automotive Applications

2022

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The increasing use of composite materials in the automotive field requires more attention with regards to the appearance of noise, vibration and harshness (NVH) study in cars construction. However, in car door panels production, impact characteristics need to be evaluated in sandwich laminates. Furthermore, it is important to consider the effect of prolonged environmental aging on crashworthiness properties. The innovative content of the work is the hygrothermal effects evaluation on impact performance for two damped CFRP sandwich laminates. In this paper, two damping materials, Kraibon HHZ9578/99 and SUT9609/24, were used as core between two skins of CFRP for sandwich composite production. Freeze-Thaw aging treatment according to IEC 60068, specific for Automotive, was performed to investigate environmental effects on components. Up to 750 h, it was demonstrated that water absorption is regulated by Fick’s Law. The low-velocity impact behavior of the damped sandwiches has been studied according to ASTM D7136 throughout drop dart test equipment. Both main peak forces and energy absorption characteristics are negatively affected by aging condition. The introduction of damping core inside the composite structure of vehicle components can satisfy NVH constrictions. By contrast, at least same operating conditions must be assured in relation to not-damped components.

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Section: Introductionmentioning

confidence: 99%

Influence of Freeze-Thaw Aging on the Impact Performance of Damped Carbon Fiber Reinforced Plastics for Automotive Applications

2022

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“…By increasing the geometric complexity it is possible to considerably optimize the final performances of 3D printed parts obtained from SLM. For instance, the superior design freedom of SLM can be exploited by methods of topological optimization as it was recently shown in [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the high-damping properties of metallic lattice structures obtained from SLM

Scalzo

Totis

Vaglio

et al. 2021

Precision Engineering

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Modern additive manufacturing technologies allow the creation of parts characterized by complex geometries that cannot be created using conventional production techniques. Among them the Selective Laser Melting (SLM) technique is very promising. By using SLM it is possible to create lightweight lattice structures that may fill void regions or partially replace bulk regions of a given mechanical component. As a consequence, the overall mechanical properties of the final component can be greatly enhanced, such as the resistance to weight ratio and its damping capacity against undesired vibrations or acoustic noise. Nevertheless, only a few research works focused on the characterization of the dynamic behaviour of lattice structures, that were mainly investigated in the low frequency range or directly tested on some specific applications. In this work the dynamic behaviour of lattice structures in the medium-high frequency range was experimentally investigated and then modelled. For this purpose, different types of lattice structures made of AlSi10Mg and AISI 316L were measured. Experimental modal analysis was performed on the obtained specimens in order to assess the influence of lattice material and unit cell geometry on their global dynamic behaviour. Experimental results revealed that lattice structures have superior damping characteristics compared to solid materials having an equivalent static stiffness. Eventually, the classic Rayleigh model was found to be adequate-with some approximation-to explain the damping behaviour of a generic lattice structure.

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“…Together with the rapid development pace of generative design technologies, additive manufacturing allows one to provide significant reduction in the weight of a vehicle, products made of expensive materials, etc. [ 8 , 9 , 10 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Indirect Temperature Measurement in High Frequency Heating Systems

Oskolkov

Bezukladnikov

Трушников

2021

Sensors

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One of the biggest challenges of fused deposition modeling (FDM)/fused filament fabrication (FFF) 3D-printing is maintaining consistent quality of layer-to-layer adhesion, and on the larger scale, homogeneity of material inside the whole printed object. An approach for mitigating and/or resolving those problems, based on the rapid and reliable control of the extruded material temperature during the printing process, was proposed. High frequency induction heating of the nozzle with a minimum mass (<1 g) was used. To ensure the required dynamic characteristics of heating and cooling processes in a high power (peak power > 300 W) heating system, an indirect (eddy current) temperature measurement method was proposed. It is based on dynamic analysis over various temperature-dependent parameters directly in the process of heating. To ensure better temperature measurement accuracy, a series-parallel resonant circuit containing an induction heating coil, an approach of desired signal detection, algorithms for digital signal processing and a regression model that determines the dependence of the desired signal on temperature and magnetic field strength were proposed. The testbed system designed to confirm the results of the conducted research showed the effectiveness of the proposed indirect measurement method. With an accuracy of ±3 °C, the measurement time is 20 ms in the operating temperature range from 50 to 350 °C. The designed temperature control system based on an indirect measurement method will provide high mechanical properties and consistent quality of printed objects.

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Weight reduction by topology optimization of an engine subframe mount, designed for additive manufacturing production

Cited by 38 publications

References 16 publications

Influence of Freeze-Thaw Aging on the Impact Performance of Damped Carbon Fiber Reinforced Plastics for Automotive Applications

Influence of Freeze-Thaw Aging on the Impact Performance of Damped Carbon Fiber Reinforced Plastics for Automotive Applications

Experimental study on the high-damping properties of metallic lattice structures obtained from SLM

Indirect Temperature Measurement in High Frequency Heating Systems

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