Results 31 to 40 of about 14,867,765 (170)

A new cohesive model for simulating delamination propagation in composite laminates under transverse loads [PDF]

, 2008
In this paper, we propose a new cohesive model to stably and accurately simulate the\ud delamination propagations in composite laminates under quasi-static and low-velocity\ud impact transverse loads using comparatively coarse meshes.
Yan, C, Okabe, T., Elmarakbi, Ahmed, Zemba, Y, Elmarakbi, A. M., Yan, Chunli, Okabe, T, Zemba, Y., Yan, Cheng, Hu, Ning, Hu, Ning, Fukunaga, Hisao   +11 more
core   +2 more sources

Numerical Simulation of Fracturing in Coals Using Water and Supercritical Carbon Dioxide with Potential-Based Cohesive Zone Models

Geofluids, 2021
The Park-Paulino-Roesler (PPR) cohesive zone model (CZM) for coal was established for analyzing mixed-mode I/II fractures using semicircular specimens under punch-through shear (PTS) and three-point bending (SCB) tests.
Jianfeng Yang, Yuqing Ren, Dingding Zhang, Yongliang Liu, Zhe Ma   +4 more
doaj   +1 more source

Implicit DEM analyses of size and shape effects on crushing strength of rockfill particles

Yantu gongcheng xuebao, 2023
An implicit version of discrete element method (DEM) called non-smooth contact dynamics (NSCD) is used to simulate the crushing process of single rockfill particle under one-dimensional (1D) compression.
HU Shenjiang 1, 2, GUO Ning 1, 2, YANG Zhongxuan 1, 2, ZHAO Jidong 3
doaj   +1 more source

Coupled crystal plasticity-cohesive zone modeling of rock salt viscoplasticity [PDF]

Rock salt, owing to its viscoplastic behavior and structural integrity under high pressure, is a promising candidate for safe and large-scale underground energy storage.
EL AREM, Saber, HABIB, Nour, AMMAR, Amine   +2 more
core   +1 more source

Push Plate Test of CRTS II Slab Ballastless Track: Theoretical Analysis, Experiments, and Numerical Simulation

Shock and Vibration, 2021
Push plate test is a powerful tool to evaluate the interfacial bond performance of China railway track structure type-II slab ballastless track structure (CRTS II SBTS). However, there is still a lack of theoretical explanation of the push plate test. In
Yu Liu, Qianqi Xu, Xiaodan Sun, Guotao Yang, Guotang Zhao   +4 more
doaj   +1 more source

A cohesive zone model for predicting delamination suppression in z-pin reinforced laminates

, 2011
This paper presents a cohesive zone model based finite element analysis of delamination resistance of z-pin reinforced double cantilever beam (DCB). The main difference between this and existing cohesive zone models is that each z- pin bridging force ...
Francesco Bianchi, Xiang Zhang, Bianchi, Francesco, Zhang, Xiang   +3 more
core   +1 more source

Some features of the PPR cohesive-zone model combined with a linear unloading/reloading relationship [PDF]

, 2017
A loading/unloading/reloading process is applied to a cohesive zone where the model proposed by Park, Paulino and Roesler in 2009 is combined with a linear unloading/reloading relationship.
GILORMINI, Pierre, DIANI, Julie
core   +1 more source

Numerical simulation of fracture propagation in deep coal seam reservoirs

Energy Science & Engineering, 2023
As an unconventional oil and gas resource, coalbed methane has become a key area of unconventional oil and gas exploration worldwide, and hydraulic fracturing is the critical technology for the efficient stimulation of coalbed methane.
Zhongzheng Tian, Zhuang Xiong, Yuhua Wei, Shou Ma, Xiaodong Hu   +4 more
doaj   +1 more source

Quasi-Static Indentation test Analyses of CFRP laminate using quasi three-dimensional XFEM

Nihon Kikai Gakkai ronbunshu, 2021
CFRP laminates subjected to out-of-plane load may have complex damage such as delamination, matrix crack and fiber failure. In this study, damage propagation analyses for Quasi-Static Indentation (QSI) tests were performed by static implicit method using
Chenyu WANG, Toshio NAGASHIMA
doaj   +1 more source

Comparative Analysis of Phase-Field and Intrinsic Cohesive Zone Models for Fracture Simulations in Multiphase Materials with Interfaces: Investigation of the Influence of the Microstructure on the Fracture Properties

Applied Sciences
This study evaluates four widely used fracture simulation methods, comparing their computational expenses and implementation complexities within the finite element (FE) framework when employed on heterogeneous solids.
Rasoul Najafi Koopas, Shahed Rezaei, Natalie Rauter, Richard Ostwald, Rolf Lammering   +4 more
doaj   +1 more source