Results 41 to 50 of about 4,851 (264)
Polymer Testing, 2023 Monotonic and pulsating cyclic compression tests were performed systematically based on high density polyethylene (HDPE). The compressive creep behaviors were further implemented to compare with the ratcheting deformation under the same peak stress level.
Peishan Ding, Xiaotao Zheng, Linwei Ma
doaj +1 more source
, 2013 This paper investigates the ratcheting and fatigue behaviour of 90 degree single unreinforced mitred pipe bends subjected to a cyclic in-plane closing moment with a non-zero mean value and constant internal pressure. An experiment was conducted to induce
Wood, James +3 more
core +1 more source
Numerical Investigation of Preload Process of Bolted Joint with Superelastic Shape Memory Alloy
Metals, 2018 A phenomenological constitutive model is developed to describe the uniaxial transformation ratcheting behaviors of the superelastic shape memory alloy (SMA) by employing a cosine–type phase transformation equation with the initial martensite ...
Xiangjun Jiang +5 more
doaj +1 more source
, 2014 The ratchet boundaries and ratchet strains are derived for the Bree problem and an elastic perfectly plastic material with different yield stresses on-load and off-load.
Chen, Haofeng +2 more
core +1 more source
Ratchet analysis of structures under a generalised cyclic load history
, 2014 This paper introduces a new approach based upon the Linear Matching Method in order to obtain the ratchet limit of structures subjected to an arbitrary thermo-mechanical load history. This method varies from the traditional Linear Matching Method ratchet
Lytwyn, Michael +5 more
core +1 more source
Special Section on Ratcheting [PDF]
Journal of Pressure Vessel Technology, 2015 The design methods for pressure vessels and piping are based on the avoidance of potential modes of failure, such as collapse, excessive deformation, and cracking. Collapse and excessive deformation from a single load application are addressed by methods such as buckling analysis, primary stress analysis, and plastic limit analysis. For instance, limit
Reza, Adibi-Asl, Wolf, Reinhardt
openaire +2 more sources
Micromechanical aspects of granular ratcheting
, 2009 The existence of granular ratcheting as a long-time behavior in granular materials is still under discussion in the scientific and engineering community.
Galindo-Torres, Sergio-Andres +2 more
core +1 more source
Advanced Engineering Materials, EarlyView.This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca +9 more
wiley +1 more source
Local Search and the Evolution of World Models
Topics in Cognitive Science, EarlyView., 2023 Abstract An open question regarding how people develop their models of the world is how new candidates are generated for consideration out of infinitely many possibilities. We discuss the role that evolutionary mechanisms play in this process. Specifically, we argue that when it comes to developing a global world model, innovation is necessarily ...
Neil R. Bramley +3 more
wiley +1 more source
Implementing Demons and Ratchets [PDF]
Entropy, 2017 Experimental results show that ratchets may be implemented in semiconductor and chemical systems, bypassing the second law and opening up huge gains in energy production. This paper summarizes or describes experiments and results on systems that effect demons and ratchets operating in chemical or electrical domains.
Peter Orem, Frank Orem
openaire +2 more sources