Crack propagation due to time-dependent creep in quasi-brittle materials under sustained loading

2008 ◽  
Vol 197 (21-24) ◽  
pp. 1938-1952 ◽  
Author(s):  
Krit Chaimoon ◽  
Mario M. Attard ◽  
Francis Tin-Loi
Keyword(s):  
Crack Propagation ◽  
Brittle Materials ◽  
Time Dependent ◽  
Sustained Loading

Modeling of Stiffness Reduction of Vibration Conveyor Springs Subjected to Ultra High Cyclic Loading under High Humidity

2011 ◽  
Vol 471-472 ◽  
pp. 975-980
Author(s):  
Takahiko Yoshi ◽  
Kazuya Okubo ◽  
Toru Fujii
Keyword(s):  
Crack Propagation ◽  
Creep Deformation ◽  
Crack Tip ◽  
Time Dependent ◽  
High Humidity ◽  
Humidity Condition ◽  
Stiffness Reduction ◽  
Carbon Fiber Cloth ◽  
Plate Spring ◽  
High Humidity Condition

Significant stiffness reduction of the plate spring due to delaminations around the interwoven cloths could be prevented by using CFRTP (carbon fiber cloth and Polyethylene Terephthalate (PET)) rather than that by using CFRP (carbon fiber cloth and epoxy), when ultra high cyclic loading was applied to the plate spring under high humidity condition. To explain the result, the prediction model of stiffness reduction was introduced considering time-dependent crack propagation accompanying with creep deformation around the crack tip. Stiffness reduction of CFRP under high humidity condition was not only determined by cyclic crack propagation but also by time-dependent crack propagation accompanying with creep deformation around the crack tip. It was found that CFRTP was effective material of the plate springs on vibration conveyer for the uses under high humidity condition to prevent significant stiffness reduction, where the crack propagation accompanying with creep deformation should be prevented around the crack tip.

scholarly journals A Proper Generalized Decomposition (PGD) approach to crack propagation in brittle materials: with application to random field material properties

2019 ◽  
Vol 65 (2) ◽  
pp. 451-473 ◽  
Author(s):  
Hasini Garikapati ◽  
Sergio Zlotnik ◽  
Pedro Díez ◽  
Clemens V. Verhoosel ◽  
E. Harald van Brummelen
Keyword(s):  
Crack Propagation ◽  
Material Properties ◽  
Computational Cost ◽  
Brittle Materials ◽  
Energy Criterion ◽  
Reduced Order Modeling ◽  
Proper Generalized Decomposition ◽  
Modeling Framework ◽  
Global Energy ◽  
Reduced Order

Abstract Understanding the failure of brittle heterogeneous materials is essential in many applications. Heterogeneities in material properties are frequently modeled through random fields, which typically induces the need to solve finite element problems for a large number of realizations. In this context, we make use of reduced order modeling to solve these problems at an affordable computational cost. This paper proposes a reduced order modeling framework to predict crack propagation in brittle materials with random heterogeneities. The framework is based on a combination of the Proper Generalized Decomposition (PGD) method with Griffith’s global energy criterion. The PGD framework provides an explicit parametric solution for the physical response of the system. We illustrate that a non-intrusive sampling-based technique can be applied as a post-processing operation on the explicit solution provided by PGD. We first validate the framework using a global energy approach on a deterministic two-dimensional linear elastic fracture mechanics benchmark. Subsequently, we apply the reduced order modeling approach to a stochastic fracture propagation problem.

Influence of micro-modulus functions on peridynamics simulation of crack propagation and branching in brittle materials

2019 ◽  
Vol 216 ◽  
pp. 106498 ◽  
Author(s):  
Zhiyong Chen ◽  
J. Woody Ju ◽  
Guoshao Su ◽  
Xiaohua Huang ◽  
Shuang Li ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Brittle Materials

618 3D morphology of crack propagation path for time dependent fracture

2012 ◽  
Vol 2012.20 (0) ◽  
pp. 173-174
Author(s):  
Yuki OWADA ◽  
Yusuke IWATA ◽  
Shin DAIKUHARA ◽  
Daiki NAITO ◽  
Satoshi KUBOTA ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Time Dependent ◽  
Propagation Path ◽  
Crack Propagation Path ◽  
3D Morphology
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