A 3-D finite element analysis of a chevron-notched, three-point bend fracture specimen for ceramic materials

1987 ◽  
Vol 34 (4) ◽  
pp. 281-295 ◽  
Author(s):  
M. G. Jenkins ◽  
A. S. Kobayashi ◽  
K. W. White ◽  
R. C. Bradt
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ceramic Materials ◽  
Element Analysis ◽  
Fracture Specimen ◽  
Point Bend

Bending Capacity Analyses of Corroded Pipeline

2011 ◽  
Vol 134 (2) ◽  
Author(s):  
Weiwei Yu ◽  
Pedro M. Vargas ◽  
Dale G. Karr
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Carrying Capacity ◽  
Nonlinear Finite Element ◽  
Secondary Effects ◽  
Element Analysis ◽  
Moment Capacity ◽  
Bend Testing ◽  
Bending Capacity ◽  
Point Bend

Appendix G of the ASME B31 pipeline and piping codes addresses the pressure containment capacity of pipelines and vessels with locally corroded sections. However, the ability of corroded sections to carry moment, for example, in thermal loops, is not addressed in fitness-for-service codes today. This paper presents nonlinear Finite Element Analysis (FEA) and full-scale 4-point-bend testing of pipes with locally-thinned-areas (LTAs) to simulate corrosion. The LTAs are loaded in compression, and the buckle moment is used as the carrying capacity of the corroded section. The nonlinear FEA is found to match the experimental results, validating this methodology for computing moment capacity in corroded sections. Significant secondary effects were found to affect the testing results. This paper identifies and quantifies these effects. Also, somewhat contrary to intuition, internal pressure is demonstrated to adversely affect the bending capacity for the intermediate-low D/t ratio (17.25) pipe tested.

Finite Element Analysis of Die-Strength Testing Configurations for Thin Wafers

2004 ◽  
Vol 127 (2) ◽  
pp. 189-192 ◽  
Author(s):  
X. K. Sun ◽  
X. J. Xin ◽  
Z. J. Pei
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Gradient ◽  
Strength Testing ◽  
Uniform Stress ◽  
Element Analysis ◽  
Ring Configuration ◽  
Die Surface ◽  
Uniform Stress Field ◽  
Point Bend

This paper presents an assessment of four die-strength testing configurations using finite element analysis. The simulation indicates that ring-on-ring configuration is the best because it generates a uniform stress field on a large die surface area. The four-point-bend configuration ranks second and the three-point-bend configuration is third. The pin-on-ring configuration is the worst because the stress gradient is severe in the central region. To minimize uncertainty in the loading positions, it is advised that loading rings or bars with small radii be used.

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