Development Of A Dynamic Failure Model For Polymeric Adhesives

2021 ◽  
Author(s):  
Harshil H Pisavadia ◽  
Patricia Dolez ◽  
James D Hogan
Keyword(s):  
Dynamic Failure ◽  
Failure Model

DYNAMIC FAILURE OF A SPOT WELD IN LAP–SHEAR TESTS UNDER COMBINED LOADING CONDITIONS

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5527-5532 ◽  
Author(s):  
J. H. SONG ◽  
J. W. HA ◽  
H. HUH ◽  
J. H. LIM ◽  
S. H. PARK
Keyword(s):  
Failure Load ◽  
Spot Weld ◽  
Combined Loading ◽  
Dynamic Failure ◽  
Failure Model ◽  
Dynamic Effects ◽  
Shear Tests ◽  
Loading Rates ◽  
Lap Shear ◽  
Failure Loads

This paper is concerned with the evaluation of the dynamic failure load in the lap-shear tests of a spot weld. Dynamic lap-shear tests of a spot weld in SPRC340R were conducted with different tensile speeds ranging from 5×10-5 m/sec to 5.0 m/sec. Dynamic effects on the failure load of a spot weld are examined based on the experimental data. Experimental results indicate that failure strength increases with increasing loading rates. Finite element analyses of dynamic lap-shear tests were also performed considering the failure of a spot weld. A spot weld is modeled with a beam element and dynamic failure model is utilized in order to describe the failure of a spot weld in the simulation. The failure loads obtained from the analyses are compared to those from the lap-shear tests. The comparison shows that the failure loads obtained from the analyses are close in consistence with those obtained from the experiments.

Noise effects on the health status in a dynamic failure model for living organisms

2007 ◽  
Vol 40 (13) ◽  
pp. 3319-3328 ◽  
Author(s):  
H Kang ◽  
J Jo ◽  
M Y Choi ◽  
J Choi ◽  
B-G Yoon
Keyword(s):  
Health Status ◽  
Dynamic Failure ◽  
Failure Model ◽  
Noise Effects ◽  
Living Organisms

Analysis on Dynamic Failure Behaviors of Steel Double-Layer Latticed Cylindrical Shells with Three Circle Centers Used in a Gymnasium

2012 ◽  
Vol 256-259 ◽  
pp. 706-709 ◽  
Author(s):  
Jun Gang Wang ◽  
Hai Wang Li
Keyword(s):  
Bearing Capacity ◽  
Double Layer ◽  
Plastic Hinge ◽  
Cylindrical Shells ◽  
Nonlinear Effects ◽  
Dynamic Failure ◽  
Failure Model ◽  
Integral Structure ◽  
Earthquake Action ◽  
Material Nonlinear

In this paper, the elasto-plastic dynamic analysis on dynamic failure behaviors of steel double-layer latticed cylindrical shells with three circle centers used in a gymnasium is carried out under EL-centro wave with SAP2000, and the appraisal results on their anti-failure performances are presented under strong earthquake action based on the plastic-hinge theory. In the analyses, the geometric and material nonlinear effects are considered simultaneously based on the plastic-hinge theory. The plastic development level of the rod, the deformed shape and the failure type and the ductility are estimated by plastic hinge principle. The results show that the failure model of the structure under the earthquake wave action is complicated. Firstly the middle of the lower chord destroyed due to lack of tensile strength, then the stiffness of the integral structure degenerated, and ultimately lost its bearing capacity. Therefore, this structure has a high bearing capacity and good ductility.

scholarly journals Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Goran Ljustina ◽  
Martin Fagerström ◽  
Ragnar Larsson
Keyword(s):  
Damage Model ◽  
Direct Consequence ◽  
Continuum Damage ◽  
Dynamic Failure ◽  
Failure Model ◽  
Damage Models ◽  
Rate Dependent ◽  
Orthogonal Machining ◽  
Element Size ◽  
Viscous Regularization

The experiences from orthogonal machining simulations show that the Johnson-Cook (JC) dynamic failure model exhibits significant element size dependence. Such mesh dependence is a direct consequence of the utilization of local damage models. The current contribution is an investigation of the extent of the possible pathological mesh dependence. A comparison of the resulting JC model behavior combined with two types of damage evolution is considered. The first damage model is the JC dynamic failure model, where the development of the “damage” does not affect the response until the critical state is reached. The second one is a continuum damage model, where the damage variable is affecting the material response continuously during the deformation. Both the plasticity and the damage models are rate dependent, and the damage evolutions for both models are defined as a postprocessing of the effective stress response. The investigation is conducted for a series of 2D shear tests utilizing different FE representations of the plane strain plate with pearlite material properties. The results show for both damage models, using realistic pearlite material parameters, that similar extent of the mesh dependence is obtained and that the possible viscous regularization effects are absent in the current investigation.

Criticality in the dynamic failure model

2008 ◽  
Vol 41 (14) ◽  
pp. 145101 ◽  
Author(s):  
J Jo ◽  
H Kang ◽  
M Y Choi ◽  
J Choi ◽  
B-G Yoon
Keyword(s):  
Dynamic Failure ◽  
Failure Model

scholarly journals Dynamic Failure Model of Thin Coal and Rock Mass under Uniform Impact Load

Engineering ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 699-714
Author(s):  
Feng Li ◽  
Fangfei Sha ◽  
Minbo Zhang ◽  
Zijian He ◽  
Xinhui Dong ◽  
...  
Keyword(s):  
Rock Mass ◽  
Impact Load ◽  
Dynamic Failure ◽  
Failure Model
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