國立虎尾科技大學 |

Damage Modeling in Metal Additive Manufacturing Process Simulations.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Damage Modeling in Metal Additive Manufacturing Process Simulations./
作者:	Fietek, Carter J.
面頁冊數:	1 online resource (78 pages)
附註:	Source: Masters Abstracts International, Volume: 84-08.
Contained By:	Masters Abstracts International84-08.
標題:	Instructional design. -
電子資源:	click for full text (PQDT)
ISBN:	9798374404913

Damage Modeling in Metal Additive Manufacturing Process Simulations.
Fietek, Carter J.

Damage Modeling in Metal Additive Manufacturing Process Simulations. - 1 online resource (78 pages)

Source: Masters Abstracts International, Volume: 84-08.

Thesis (M.S.M.E.)--New Mexico State University, 2022.

Includes bibliographical references

Additive manufacturing (AM) has become one of the industry's most revolutionary technologies for the fabrication of metal parts. Powder bed fusion is an additive manufacturing method that uses a laser or electron beam to melt and fuse raw metal powder into a complex three-dimensional part. This process involves rapid heating and solidification, resulting in high thermal gradients causing undesired residual stress and distortion that may significantly decrease the final product's integrity. The buildup of residual stresses can cause damage and eventual failure in service. This study investigates the impact of high thermal gradients, coupled with structural deformation, on the development of residual stress, distortions and ductile damage for parts manufactured through powder bed fusion. Commercial finite element analysis (FEA) software, Abaqus, was used for the sequentially coupled thermo-mechanical analysis. The analysis considers the layer-by-layer scanned path (tool path) generated for each 3D geometry. A user-defined material script (UMAT) was developed to model nonlinear material behavior and the propagation of ductile damage based on a Johnson-Cook failure model in the structural simulation. Heat transfer in additive manufacturing is time-dependent, and the resulting temperature distribution will typically be non-uniform. Therefore, the temperature history is first calculated in a transient heat transfer analysis and introduced as a predefined field in the subsequent structural analysis. After the thermal analysis is completed, the quasi-static stress analysis is completed for each time step considering the temperature prescribed, the new layer activated, and temperature-dependent material. The plastic deformation, temperature and strain rate then impact the accumulation of damage in the part. This method for predicting residual stress and distortions within an AM part accurately predict the final manufactured product. Results from these analyses are employed to evaluate the damage initiation of 3D-printed components.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798374404913Subjects--Topical Terms:

1148462
Instructional design.
Subjects--Index Terms:

Additive manufacturingIndex Terms--Genre/Form:

554714
Electronic books.

Damage Modeling in Metal Additive Manufacturing Process Simulations.
LDR:03493ntm a22004217 4500 001 1148464
005 20240924101519.5
006 m o d
007 cr bn ---uuuuu
008 250605s2022 xx obm 000 0 eng d
020 $a 9798374404913
035 $a (MiAaPQ)AAI29994996
035 $a AAI29994996
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Fietek, Carter J. $3 1474429
245 1 0 $a Damage Modeling in Metal Additive Manufacturing Process Simulations.
264 0 $c 2022
300 $a 1 online resource (78 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 84-08.
500 $a Advisor: Park, Young Ho.
502 $a Thesis (M.S.M.E.)--New Mexico State University, 2022.
504 $a Includes bibliographical references
520 $a Additive manufacturing (AM) has become one of the industry's most revolutionary technologies for the fabrication of metal parts. Powder bed fusion is an additive manufacturing method that uses a laser or electron beam to melt and fuse raw metal powder into a complex three-dimensional part. This process involves rapid heating and solidification, resulting in high thermal gradients causing undesired residual stress and distortion that may significantly decrease the final product's integrity. The buildup of residual stresses can cause damage and eventual failure in service. This study investigates the impact of high thermal gradients, coupled with structural deformation, on the development of residual stress, distortions and ductile damage for parts manufactured through powder bed fusion. Commercial finite element analysis (FEA) software, Abaqus, was used for the sequentially coupled thermo-mechanical analysis. The analysis considers the layer-by-layer scanned path (tool path) generated for each 3D geometry. A user-defined material script (UMAT) was developed to model nonlinear material behavior and the propagation of ductile damage based on a Johnson-Cook failure model in the structural simulation. Heat transfer in additive manufacturing is time-dependent, and the resulting temperature distribution will typically be non-uniform. Therefore, the temperature history is first calculated in a transient heat transfer analysis and introduced as a predefined field in the subsequent structural analysis. After the thermal analysis is completed, the quasi-static stress analysis is completed for each time step considering the temperature prescribed, the new layer activated, and temperature-dependent material. The plastic deformation, temperature and strain rate then impact the accumulation of damage in the part. This method for predicting residual stress and distortions within an AM part accurately predict the final manufactured product. Results from these analyses are employed to evaluate the damage initiation of 3D-printed components.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Instructional design. $3 1148462
650 4 $a Industrial engineering. $3 679492
650 4 $a Mechanical engineering. $3 557493
653 $a Additive manufacturing
653 $a Powder bed fusion
653 $a Finite element analysis
653 $a Johnson-Cook failure model
653 $a Thermo-mechanical analysis
653 $a UMAT
653 $a Residual stress
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
690 $a 0447
690 $a 0546
710 2 $a New Mexico State University. $b Mechanical and Aerospace Engineering. $3 1470303
710 2 $a ProQuest Information and Learning Co. $3 1178819
773 0 $t Masters Abstracts International $g 84-08.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29994996 $z click for full text (PQDT)