A comparison of experimental data with the predictions shows excellent agreement for two-stage cyclic tests.
Reduced models of multi-stage cyclic structures such as bladed-disk assemblies are developed by using the multi-stage cyclic symmetry reduction and/or component mode synthesis methods.
An automated constitutive parameter optimisation process in combination with a new two-stage cyclic damage evolution model successfully predicts the effect of strain-range on damage evolution.
This study investigated the effects of freeze-thaw cycles, dynamic stress amplitude, confining pressure, number of cyclic loading and multi-stage cyclic loading on the evolution of accumulative plastic strain for thawed saturated clay by using dynamic tri-axial tests.
Evolution of the accumulative strain under multi-stage cyclic loading can be divided into three phases by two threshold CSRs (cyclic stress ratio), i.e., the gradual stabilization phase, the rapid growth phase and the failure phase.
On the other hand, component mode synthesis methods are used either independently or in combination with the multi-stage cyclic symmetry reduction to obtain reduced models of the multi-stage structure.
The infrared camera was able to detect the evolution of weft yarn cracking during the initial stage, as well as the initiation and growth of interply delamination cracking during the final stage of three-stage cyclic damage evolution.
The multi-stage cyclic symmetry reduction consists in writing the equations of the bladed disks, the inter-disk structures, the inter-disk constraints and the whole multi-stage coupled system in terms of the traveling wave coordinates for all the phase indexes of the reference sectors and for all the bladed disks.
Users of the PDSA method follow a prescribed four-stage cyclic learning approach to adapt changes aimed at improvement.
