Modeling of Damage of Ductile Materials

2019 ◽  
pp. 49-78
Author(s):  
Michael Brünig ◽  
Moritz Zistl ◽  
Steffen Gerke
Keyword(s):  
Ductile Materials

Elastoplastic Behavior of Highly Ductile Materials

2019 ◽  
Author(s):  
Maosheng Zheng ◽  
Zhifu Yin ◽  
Haipeng Teng ◽  
Jiaojiao Liu ◽  
Yi Wang
Keyword(s):  
Elastoplastic Behavior ◽  
Ductile Materials

Stress state characterization of ductile materials during scratch abrasion

Wear ◽  
2021 ◽  
pp. 203712
Author(s):  
Dhanraj Rajaraman ◽  
V. Keim ◽  
K. Pondicherry ◽  
A. Nonn ◽  
S. Hertelé ◽  
...  
Keyword(s):  
Stress State ◽  
Ductile Materials

On the path-dependence of the fracture locus in ductile materials – Analysis

2012 ◽  
Vol 37 ◽  
pp. 157-170 ◽  
Author(s):  
A.A. Benzerga ◽  
D. Surovik ◽  
S.M. Keralavarma
Keyword(s):  
Path Dependence ◽  
Materials Analysis ◽  
Ductile Materials ◽  
Fracture Locus

Mechanical competition alters the cellular interpretation of an endogenous genetic program

2021 ◽  
Vol 220 (11) ◽  
Author(s):  
Sourabh Bhide ◽  
Denisa Gombalova ◽  
Gregor Mönke ◽  
Johannes Stegmaier ◽  
Valentyna Zinchenko ◽  
...  
Keyword(s):  
Genetic Program ◽  
Cell Behavior ◽  
Mechanical Stimuli ◽  
Apical Constriction ◽  
Actin Reorganization ◽  
Ductile Materials ◽  
Nonlinear Mechanical ◽  
A Cell ◽  
Contractile Forces ◽  
Strain Responses

The intrinsic genetic program of a cell is not sufficient to explain all of the cell’s activities. External mechanical stimuli are increasingly recognized as determinants of cell behavior. In the epithelial folding event that constitutes the beginning of gastrulation in Drosophila, the genetic program of the future mesoderm leads to the establishment of a contractile actomyosin network that triggers apical constriction of cells and thereby tissue folding. However, some cells do not constrict but instead stretch, even though they share the same genetic program as their constricting neighbors. We show here that tissue-wide interactions force these cells to expand even when an otherwise sufficient amount of apical, active actomyosin is present. Models based on contractile forces and linear stress–strain responses do not reproduce experimental observations, but simulations in which cells behave as ductile materials with nonlinear mechanical properties do. Our models show that this behavior is a general emergent property of actomyosin networks in a supracellular context, in accordance with our experimental observations of actin reorganization within stretching cells.

Effect of peanut and walnut shells powders on tensile properties and morphological test by using heat cured PMMA as a matrix for prosthetic Denture

2021 ◽  
Vol 39 (2A) ◽  
pp. 196-205
Author(s):  
Zainab M. Abdul Monem ◽  
Jawad K. Oleiwi ◽  
Qahtan A. Hamad
Keyword(s):  
Fracture Surface ◽  
Surface Morphology ◽  
Matrix Material ◽  
Weight Fraction ◽  
Fracture Surface Morphology ◽  
Ductile Materials ◽  
Walnut Shells ◽  
Peanut Shells ◽  
The Matrix ◽  
Material Powder

In the current Research , the heat cured   matrix material powder of PMMA was reinforced with peanut and walnut shells (natural powders) which are chemically treated with 5% (w/v) (NaOH) to improve the matrix bonding (PMMA) before being used as a reinforcing powder and adding to exactly similar averages particle sizes ≤ (53µm), with different weight fractions of (4, 8, and 12 wt.%). The ASTM D638 is used for composite specimens of the tensile test. The results indicated that the Elastic modulus values reached its maximum value at (8 wt.%.) when reinforced with peanut shells particles (1.053Gpa) , while ,the values of tensile strength, elongation percentage at break, decrease as the weight fraction of peanut and walnut shells powder increase and the lowest values is obtained by reinforcing with peanut shells particles to reach their minimum values at (12 wt.%.) where the lowest values of them are (29 MPa, 2.758% ) respectively. The fracture surface morphology of pure PMMA seemed to be homogenous morphology in (SEM) test, whereas the fracture surface morphology of PMMA composite reinforced by (peanut and walnut shells) powders and shows a roughness fracture surface morphology this refer to semi ductile to ductile materials.

Constitutive behavior of porous ductile materials accounting for micro-inertia and void shape

2015 ◽  
Vol 80 ◽  
pp. 324-339 ◽  
Author(s):  
C. Sartori ◽  
S. Mercier ◽  
N. Jacques ◽  
A. Molinari
Keyword(s):  
Constitutive Behavior ◽  
Ductile Materials ◽  
Void Shape
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