358
R. dell’Erba
Fig. 18.32 Tensile test with fracture rectangular centered lattice, coordination number 5. Configuration over different times (1, 23, 33, 38, 40 and 63) with PE1 contour plot, of pseudoenergy
a piece of paper. The fracture distance is 10 units, and the speed is 0.4 unit/time step
(Fig. 18.34).
Case (c) ASTM test
In order to investigate sample behavior of a well-known shape, we have carried out
some calculations considering a specimen quite similar to the ASTM D638 standards
for tensile tests. The specimen is clamped at both ends on a surface and pulled on
one side, so, in this case, the leaders are many; the test speed is of 2.5 unit/step, in x
positive direction, for 150 traction step e 2500 relaxation step. We have considered
simple tensile tests with different lattice, lateral contraction effect and fracture cases.
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