A Rigid Block Model with Cracking Units for Limit Analysis of Masonry Walls subject to In-Plane Loads

2012 ◽  
Author(s):  
F. Portioli ◽  
L. Cascini ◽  
M. D'Aniello ◽  
R. Landolfo
Keyword(s):  
Limit Analysis ◽  
Masonry Walls ◽  
Rigid Block ◽  
Block Model

Limit analysis of masonry walls by rigid block modelling with cracking units and cohesive joints using linear programming

2013 ◽  
Vol 57 ◽  
pp. 232-247 ◽  
Author(s):  
Francesco Portioli ◽  
Lucrezia Cascini ◽  
Claudia Casapulla ◽  
Mario D'Aniello
Keyword(s):  
Linear Programming ◽  
Limit Analysis ◽  
Masonry Walls ◽  
Rigid Block

Simultaneous Shape and Topology Optimization of Planar Linkage Mechanisms Based on the Spring-Connected Rigid Block Model

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Jeonghan Yu ◽  
Sang Min Han ◽  
Yoon Young Kim
Keyword(s):  
Topology Optimization ◽  
Simultaneous Optimization ◽  
Optimization Process ◽  
Rigid Block ◽  
Low Resolution ◽  
Block Model ◽  
Shape And Topology Optimization ◽  
Fixed Grid ◽  
Computation Efficiency ◽  
And Topology

Abstract Using the topology optimization can be an effective means of synthesizing planar rigid-body linkage mechanisms to generate desired motion, as it does not require a baseline mechanism for a specific topology. While most earlier studies were mainly concerned with the formulation and implementation of topology optimization-based synthesis in a fixed grid, this study aims to realize the simultaneous shape and topology optimization of planar linkage mechanisms using a low-resolution spring-connected rigid block model. Here, we demonstrate the effectiveness of simultaneous optimization over a higher-resolution fixed-grid rigid block-based topology optimization process. When shape optimization to change the block shapes is combined with topology optimization to synthesize the mechanism, the use of low-resolution discretized models improves the computation efficiency considerably and helps to yield compact mechanisms with less complexity, making them more amenable to fabrication. After verifying the effectiveness of the simultaneous shape and topology optimization process with several benchmark problems, we apply the method to synthesize a mechanism which guides a planar version of a human's gait trajectory.

A macro-block model for in-plane loaded masonry walls with non-associative Coulomb friction

Meccanica ◽  
2013 ◽  
Vol 48 (9) ◽  
pp. 2107-2126 ◽  
Author(s):  
C. Casapulla ◽  
F. Portioli ◽  
A. Maione ◽  
R. Landolfo
Keyword(s):  
Coulomb Friction ◽  
Masonry Walls ◽  
Block Model ◽  
Macro Block
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