A new overhang constraint for topology optimization of self-supporting structures in additive manufacturing

Garaigordobil, Alain; Ansola, Rubén; Santamaría, Javier; Bustos, Igor Fernández de

doi:10.1007/s00158-018-2010-7

Cited by 84 publications

(42 citation statements)

References 42 publications

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“…The support structure usage has optimized at 45 o , 60 o and 90 o of overhang angle 3D model [13]. In this study, the sixteen kind of overhang angle is set up in this experiment object to find out the minimum angle in term for support structure needed.…”

Section: B the Overhang Angle Effect Of 3d Model To Surface Quality mentioning

confidence: 99%

The Characteristic of Overhang Object to Material Usage on FDM 3D Printing Technology

Bintara

Aminnudin

Prasetiyo

et al. 2019

JMEST

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Fuse Deposition Modeling (FDM) 3D printing is one of additive manufacturing technology which physical 3D model is build up layer by layer. The support structure is almost involved on the process if overhang shape is met on the 3D model. It has main function to prevent the 3D printed model from collapsing. Commonly, the single material source of FDM 3D printer machine is to supply building two structure, structure of main 3D object and support structure. Hence, our goal optimizes the using of support material for reducing the main material usage. Furthermore, the sixteen of variation overhang angle is set to the 3D model. All models are printed into two kind of 3D printed model, printed model with support structure addition and without support addition. The weight of each 3D printed model is measured by weight scale with accuracy of tool is 10 -4 g. Then the quality and the weight of 3D printed model are compared and analyzed. The result shows that the average overweight of 3D printed model with support structure addition is 40.41% than without support structure addition. Furthermore, there are several the 3D printed models without support structure that fail printed on variety model with 0° until 11° of overhang angle. The conclusion of this study is that the support structure can prevent the 3D printed model from collapsing but it does not need be built up if the overhang angle more than 11°.

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Section: B the Overhang Angle Effect Of 3d Model To Surface Quality mentioning

confidence: 99%

The Characteristic of Overhang Object to Material Usage on FDM 3D Printing Technology

Bintara

Aminnudin

Prasetiyo

et al. 2019

JMEST

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“…Several exciting works have focused on including the AM constraints, such as support structure elimination (through overhang elimination) in topology optimization routines and are included in references [28][29][30][31][32][33][34][35][36]. Additionally, Liu et al [37] recently presented a review paper on recent trends and future challenges that are associated with the incorporation of AM constraints and considerations into topology optimization algorithms.…”

Section: Topology Optimization For Additive Manufacturingmentioning

confidence: 99%

Topology Optimization for Additive Manufacturing as an Enabler for Light Weight Flight Hardware

Orme¹,

Madera²,

Gschweitl

et al. 2018

Designs

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Three case studies utilizing topology optimization and Additive Manufacturing for the development of space flight hardware are described. The Additive Manufacturing (AM) modality that was used in this work is powder bed laser based fusion. The case studies correspond to the redesign and manufacture of two heritage parts for a Surrey Satellite Technology LTD (SSTL) Technology Demonstrator Space Mission that are currently functioning in orbit (case studies 1 and 2), and a system of five components for the SpaceIL’s lunar launch vehicle planned for launch in the near future (case study 3). In each case, the nominal or heritage part has undergone topology optimization, incorporating the AM manufacturing constraints that include: minimization of support structures, ability to remove unsintered powder, and minimization of heat transfer jumps that will cause artifact warpage. To this end the topology optimization exercise must be coupled to the Additive Manufacturing build direction, and steps are incorporated to integrate the AM constraints. After design verification by successfully passing a Finite Element Analysis routine, the components have been fabricated and the AM artifacts and in-process testing coupons have undergone verification and qualification testing in order to deliver structural components that are suitable for their respective missions.

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“…For an overview of research on this topic, we refer to a recent survey article by Liu et al (2018a). In particular, the developments have been focusing on AM constraints and/or characteristics such as the overhang angle (e.g., Wu et al 2016b;Gaynor and Guest 2016;Mirzendehdel and Suresh 2016;Qian 2017;Langelaar 2017Langelaar , 2018van de Ven et al 2018;Garaigordobil et al 2018;Allaire et al 2017a;Wang et al 2019), infill structures (e.g., Wu et al 2017Wu et al , 2018Groen et al 2019;Fu et al 2018;Clausen et al 2016;Garner et al 2019), thermal residual stresses (e.g., Allaire and Jakabčin 2018), and material anisotropy, i.e., due to the deposition path (e.g., Liu et al 2018b;Dapogny et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Space-time topology optimization for additive manufacturing

Wang

Munro

Keulen

et al. 2019

Struct Multidisc Optim

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The design of optimal structures and the planning of (additive manufacturing) fabrication sequences have been considered typically as two separate tasks that are performed consecutively. In the light of recent advances in robot-assisted (wire-arc) additive manufacturing which enable addition of material along curved surfaces, we present a novel topology optimization formulation which concurrently optimizes the structure and the fabrication sequence. For this, two sets of design variables, i.e., a density field for defining the structural layout, and a time field which determines the fabrication process order, are simultaneously optimized. These two fields allow to generate a sequence of intermediate structures, upon which manufacturing constraints (e.g., fabrication continuity and speed) are imposed. The proposed space-time formulation is general, and is demonstrated on three fabrication settings, considering self-weight of the intermediate structures, process-dependent critical loads, and time-dependent material properties.

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A new overhang constraint for topology optimization of self-supporting structures in additive manufacturing

Cited by 84 publications

References 42 publications

The Characteristic of Overhang Object to Material Usage on FDM 3D Printing Technology

The Characteristic of Overhang Object to Material Usage on FDM 3D Printing Technology

Topology Optimization for Additive Manufacturing as an Enabler for Light Weight Flight Hardware

Space-time topology optimization for additive manufacturing

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