Results 71 to 80 of about 8,118 (208)

Hybrid Artificial Intelligence Approaches for Predicting Critical Buckling Load of Structural Members under Compression Considering the Influence of Initial Geometric Imperfections

Applied Sciences, 2019
The main aim of this study is to develop different hybrid artificial intelligence (AI) approaches, such as an adaptive neuro-fuzzy inference system (ANFIS) and two ANFISs optimized by metaheuristic techniques, namely simulated annealing (SA) and ...
Hai-Bang Ly, Lu Minh Le, Huan Thanh Duong, Thong Chung Nguyen, Tuan Anh Pham, Tien-Thinh Le, Vuong Minh Le, Long Nguyen-Ngoc, Binh Thai Pham   +8 more
doaj   +1 more source

Analysis of Geometric Imperfections Affecting the Fibers in Unidirectional Composites

, 1996
The compressive strength of unidirectional composites is partly limited by the presence of geometric imperfections, mainly including undulation and general misalignment of the fibers.
Bernard Paluch
core   +1 more source

Effect of multiple localized geometric imperfections on stability of thin axisymmetric cylindrical shells under axial compression

, 2011
Stability of imperfect elastic cylindrical shells which are subjected to uniform axial compression is analyzed by using the finite element method. Multiple interacting localized axisymmetric initial geometric imperfections, having either triangular or ...
Khamlichi Abdellatif, Jalal, El Bahaoui, Limam Ali, El Bakkali Larbi, Ali, Limam, El Bahaoui Jalal, Abdellatif, Khamlichi, Larbi, El Bakkali   +7 more
core   +1 more source

Effect of bending on the geometry and collapse pressure of helical steam generator tubes: Numerical study

Nuclear Engineering and Technology
This study investigates the effects of bending processes on the geometry and collapse pressure of helical steam generator tubes used in Small Modular Reactors (SMRs).
M. Park, M.W. Lee, K. Ahn, G.G. Youn
doaj   +1 more source

Sensitivity analysis of a member under compression via Monte Carlo method

Revista UIS Ingenierías, 2018
The present work studies the application of a probabilistic methodology in the sensitivity analysis of a steel column to identify the dominant parameters in its load capacity.
Javier Martínez, Euro Casanova, Carlos Graciano, Octavio Andrés González-Estrada   +3 more
doaj   +1 more source

Imperfection sensitivity analysis for a composite bowed-out shell under axial compression

Advances in Mechanical Engineering, 2019
In this article, we present a systematic work to investigate the imperfection sensitivity of composite bowed-out shells with different layup patterns under axial compression. Two types of geometric imperfections, including eigenmode-shaped imperfections (
Zhun Li, Guang Pan, Kechun Shen
doaj   +1 more source

Residual Stresses and Geometric Imperfections in High-Strength Steel Cellular Beams: Sensitivity Analysis

Although the use of high-strength steel in cellular beams enhances both structural performance and sustainability, it remains largely unexplored in current literature.
Ferreira, F. P. V., De Nardin, S., Tsavdaridis, K., Pazin, V. A.   +3 more
core   +1 more source

Evaluation of Stress-Increase Caused by Geometric Imperfections in Longitudinally-Welded Hot Reheat Steam Piping of Mod. 9Cr-1Mo Steel

, 2017
In this paper, effect of geometric imperfections on peak stress in softened heat affected zone (HAZ) of longitudinally-welded hot reheat steam piping of mod. 9Cr-1Mo steel was investigated by parametric two-dimensional finite element analyses.
Masatsugu Yaguchi, Haruhisa Shigeyama, Yukio Takahashi   +2 more
core   +1 more source

Imperfection‐Enabled Strengthening of Ultra‐Lightweight Lattice Materials

Advanced Science
Lattice materials are an emerging family of advanced engineering materials with unique advantages for lightweight applications. However, the mechanical behaviors of lattice materials at ultra‐low relative densities are still not well understood, and this
Junhao Ding, Qingping Ma, Xinwei Li, Lei Zhang, Hang Yang, Shuo Qu, Michael Yu Wang, Wei Zhai, Huajian Gao, Xu Song   +9 more
doaj   +1 more source

Geometric Imperfections and Residual Stresses for Use in the Analytical Modeling of Cold-formed Steel Members

, 1996
Geometric imperfections and residual stresses influence the behavior and ultimate strength of cold-formed steel members. Advanced analytical models (i.e.
Pekoz, Teoman, Schafer, Benjamin W.
core