S185 Invited—Using Finite Element Analysis and Synchrotron X-ray Diffraction to Understand Stress Distributions in Deforming Polycrystals

2008 ◽  
Vol 23 (2) ◽  
pp. 182-182
Author(s):  
M. P. Miller ◽  
J.-S. Park ◽  
P. R. Dawson ◽  
T.-S. Han
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distributions ◽  
X Ray Diffraction ◽  
Element Analysis ◽  
X Ray

scholarly journals Effect of a Multiple Reduction Die on the Residual Stress of Drawn Materials

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1358
Author(s):  
Jeong-Hun Kim ◽  
Chang-Hyun Baek ◽  
Sang-Kon Lee ◽  
Jong-Hun Kang ◽  
Joon-Hong Park ◽  
...  
Keyword(s):  
Neural Network ◽  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Residual Stresses ◽  
Deep Neural Network ◽  
Drawing Process ◽  
X Ray Diffraction ◽  
Element Analysis ◽  
X Ray

Residual stress may influence the mechanical behavior and durability of drawn materials. Thus, this study develops a multiple reduction die (MRD) that can reduce residual stress during the drawing process. The MRD set consists of several die tips, die cases, and lubricating equipment. All the die tips of the MRD were disposed of simultaneously. Finite element analysis of the drawing process was performed according to the reduction ratio of each die tip, and the variables in drawing process with the MRD were optimized using a deep neural network to minimize the residual stress. Experiments on the drawing process with the conventional die and MRD were performed to evaluate the residual stress and verify the effectiveness of the MRD. The results of X-ray diffraction measurements indicated that the axial and hoop residual stresses on the surface were dramatically reduced.

Evaluation of Strain Measurement in a Die-to-Interposer Chip Using In Situ Synchrotron X-Ray Diffraction and Finite-Element Analysis

2013 ◽  
Vol 43 (1) ◽  
pp. 52-56 ◽  
Author(s):  
Hsueh-Hsien Hsu ◽  
Tz-Cheng Chiu ◽  
Tao-Chih Chang ◽  
Shin-Yi Huang ◽  
Hsin-Yi Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Measurement ◽  
X Ray Diffraction ◽  
Element Analysis ◽  
X Ray

scholarly journals Comparison of Tooth- and Bone-Borne Appliances on the Stress Distributions and Displacement Patterns in the Facial Skeleton in Surgically Assisted Rapid Maxillary Expansion—A Finite Element Analysis (FEA) Study

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1152
Author(s):  
Rafał Nowak ◽  
Anna Olejnik ◽  
Hanna Gerber ◽  
Roman Frątczak ◽  
Ewa Zawiślak
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Rapid Maxillary Expansion ◽  
Stress Distributions ◽  
Maxillary Expansion ◽  
Facial Skeleton ◽  
Element Analysis ◽  
Maxillary Constriction

The aim of this study was to compare the reduced stresses according to Huber’s hypothesis and the displacement pattern in the region of the facial skeleton using a tooth- or bone-borne appliance in surgically assisted rapid maxillary expansion (SARME). In the current literature, the lack of updated reports about biomechanical effects in bone-borne appliances used in SARME is noticeable. Finite element analysis (FEA) was used for this study. Six facial skeleton models were created, five with various variants of osteotomy and one without osteotomy. Two different appliances for maxillary expansion were used for each model. The three-dimensional (3D) model of the facial skeleton was created on the basis of spiral computed tomography (CT) scans of a 32-year-old patient with maxillary constriction. The finite element model was built using ANSYS 15.0 software, in which the computations were carried out. Stress distributions and displacement values along the 3D axes were found for each osteotomy variant with the expansion of the tooth- and the bone-borne devices at a level of 0.5 mm. The investigation showed that in the case of a full osteotomy of the maxilla, as described by Bell and Epker in 1976, the method of fixing the appliance for maxillary expansion had no impact on the distribution of the reduced stresses according to Huber’s hypothesis in the facial skeleton. In the case of the bone-borne appliance, the load on the teeth, which may lead to periodontal and orthodontic complications, was eliminated. In the case of a full osteotomy of the maxilla, displacements in the buccolingual direction for all the variables of the bone-borne appliance were slightly bigger than for the tooth-borne appliance.

Finite element analysis of a scanning x‐ray microscope micropositioning stage

1992 ◽  
Vol 63 (1) ◽  
pp. 591-594 ◽  
Author(s):  
H. T. H. Chen ◽  
W. Ng ◽  
R. L. Engelstad
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
X Ray
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