Comparison of Stresses in the Junctions of Shell Structures with Bolted Flange Rings
Bibliographic record
Abstract
Bolted flange joints are favored across a spectrum of pressure vessel applications within diverse industries, owing to their simplicity in installation and operation. However, ensuring their structural integrity and leak-proof performance necessitates careful consideration of both operational conditions and the nature of the connected shell. Yet, the existing ASME BPV Code for flange design lacks inclusion of a leakage criterion or flexibility analysis, hindering accurate assessment of these critical characteristics. This research aims to comprehensively evaluate the integrity and leakage resilience of various shell configurations attached to flange rings. The investigation will scrutinize pivotal factors such as flange rotation and stress distribution at the flange-shell interface, leveraging diverse shell theories across three distinct flange sizes: NPS 26, 48, and 60. Additionally, four prevalent types of shell connections—cylindrical, spherical, dish, and conical—will be juxtaposed. Notably, all shell connections are directly affixed to the raised-face flange ring. To facilitate comparison and validation, these shell connections will be simulated using a versatile finite element program, augmenting the analytical approach. Noteworthy is the incorporation of the gasket's nonlinear behavior in the finite element analysis, a crucial aspect overlooked in the analytical modeling process.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".