ACTA TECHNICA NAPOCENSIS
SCIENTIFIC BULLETIN OF THE TECHNICAL
UNIVERSITY OF CLUJ-NAPOCA
2010
No.53
Series: APPLIED MATHEMATICS AND MECHANICS
CONTENTS
TEODORESCU, P.P., TOMA, Ileana, The pendulum – A mathematical hardcore………………125
TEODORESCU, P.P., CHIROIU, Veturia, MUNTEANU, Ligia, DUMITRU, D.,
An inverse problem in the theory of steel buckling of the carbon nanotubes
using nanoindentation……………………………………………………………………..133
ILIESCU, N., NĂSTĂSESCU, V., ATANASIU, C., The evaluation of the safety
coefficient for the pressed joint between the axle and the weel hub of an electric
locomotive………………………………………………………………………………….139
PAZARA, T., PRICOP, M., PRICOP, Codruţa, GHEORGHE, F., Analysis of
the vibrations produced in the machine compartment onboard training-ship
“Mircea”…………………………………………………………………………………..143
GHITA, E., MATEI, M., URSU-NEAMŢ, G., STEPAN, D., An experimental analysis
regarding the quality of the light-rail network for public transportation in the
city of Timişoara…………………………………………………………………………...149
PRICOP, M., GHEORGHE, F., ONCICA, V., PAZARA, T., Dimensioning the wave
energy collector structure under pulsating wave loads…………………………………...153
SUCIU, Mihaela, Calculus of the cylindrical spring with a vertical load by transfer
matrix method……………………………………………………………………………...159
FRĂŢILĂ, M., Determination of stresses to a thin wall tube bending……………………………165
FRĂŢILĂ, M., PASCU, A., Determination of the stresses in the lenticular compensatory
for thermal expansion applied with a shear force…………………………………………169
NĂSTĂSESCU, V., ILIESCU, N., Upon accompanying the experimental testing of
materials by numerical analysis with FEM…………………………………………….....173
DUDESCU, M.C., ŞOMOTECAN, Mărioara, BOTEAN, A.I., Direct application of
strain gauges on wood……………………………………………………………………..179
SIMION, Mihaela, BOTEAN, A.I., DUDESCU, M.C., Experimental studies of the
normal stresses for an equal strength beam and a flanged beam…………………………185
PASCU, A., OLESNIK, Mihaela, FRĂŢILĂ, M., AVRIGEAN, E., Stress and strain
analysis in plate with slotted holes placed in two different patterns, loading
in perpendicular plane of plate…………………………………………………………....189
BOTEAN, A.I., HĂRDĂU, M., The study of mechanical and thermal streses in related
multiple circular plates………………………………………………………………….....195
DUMITRACHE, P., The response of the protective structures (ROPS/FOPS) using the
numerical simulation of the standard impact……………………………………………...203
DUMITRACHE, P., About the numerical simulation for the behavior of the shock
absorbing assemblies with rubber components, using finite element method………….....207
NES, C.S., FAUR, N., MARSAVINA, L., Numerical analysis crack angle and crack
interaction influence on stress intensity factors…………………………………………...213
MOCANU, C.I., CRISTEA, Bianca, COMAN, A., LEFTER, V.S., Study of strain
stress variation at the solicitation of the shock at panels made of GRP…………………..219
CURTU, I., STANCIU, Mariana Domnica, Correlation between experimental method
and fem regarding normal modes of anisotropic plates…………………………………...229
COŞEREANU, Camelia, CURTU, I., LICA, D., Research on the stresses and deformations
of the lignin-cellulose based panels……………………………………………………….235
BIRLAN, A., FAUR, N., JADANEANT, M., Finite element modeling the temperature
fields plastic injection……………………………………………………………………...239
MĂNESCU, T.Ş., ZAHARIA, N.L., MĂNESCU, T. jr., FĂNICĂ, C., Strain gages
experimental stress analysis at two EAOS type wagons, a comprehensive study…………245
DRĂGAN, D., ARNĂUTU, M.C., SIMION, I., ZAHARIA, N.L., Strain gages
experimental stress analysis at a methanol tank wagon………………………………...... 249
HOŢA, H., BOBANCU , Ş., GÁLFI, B., SZÁVA, I., An efficient stand and some
preliminary results on the rolling friction coefficient evaluation of the steel-steel
elements……………………………………………………………………………………253
PREDOI, V.M., SOARE, M. PETRE, C.C., Optimal choice of guided modes for coated
plates inspection…………………………………………………………………………...257
PETRE, C.C., PREDOI, M.V., SOARE, M., Experimental validation of guides waves
use for coated plates inspection…………………………………………………………...259
RĂDOIU, B., VLASCEAN, D., PERIDE, N., Parapets plated with composite rubber –
A comparative study of behavior at shock…………………………………………………261
DUMITRU, I., TRIPA, P., HLUSCU, M., KUN, L., Durability analysis of fretted
cylinders subject to variable pressure……………………………………………………..267
CHIRICĂ, I., BOAZU, Doina, RIPA, S., Dynamic behavior of ship hull composite
plates under explosive blasts……………………………………………………………....273
CHIRICĂ, I., BEZNEA, Elena-Felicia, AVRAM, F., Shear buckling of the composite
plates with delaminations……………………………………………………………….....283
CHIRICĂ, I., BEZNEA, Elena-Felicia, GIUGLEA, Ş., CHIRICĂ, A., Fatigue analysis
of a ship structural detail………………………………………………………………….293
BRATU, P., VASILE, O., Experimental analysis of neoprene systems excited by
inertial harmonic vibrations…………………………………………………………….....301
BRATU, P., Equivalent viscous damping for the neoprene hysteretic systems excited by
harmonic actions………………………………………………………………………...... 305
LINUL, E., MARŞAVINA, L., CERNESCU, A.V., The effect of loading, the direction
of deformation and density of rigid polyurethane foams subjected to compression………311
ŞERBAN, D.A., MARŞAVINA, L., CULEA, L., SILBERSCHMIDT, V., Experimental
study of Mullins effect in semi-crystalline thermoplastic materials…………………….....317
ROŞCA, V., GEONEA, I., Durability variation of Steel R520 with temperature to an
oscillator traction fatigue test...... 323
ROŞCA, V., GEONEA, I., Stress field variation at the tip of a crack by mono axial
excentric fatigue fracture to 213K temperature...... 329
ILIESCU, N., PASTRAMĂ, Ş.D., JIGA, G., The efficiency of Kuntscher nail technique
in the treatment of tibia fracture – An experimental study………………………………...335
FLEŞERU, T., VASILOAICA, C., The optimization of core decompression in avascular
necrosis of the femoral head using photoelasticity………………………………………..339
BREZEANU, Ligia, BERESESCU, Gabriela, FEM stress analysis before and after
cervical lesion restoration…………………………………………………………………345
OLESNIK, V., PASCU, A., FLEACĂ, R., ROMAN, M., DEAC, C., Using finite element
method study of autologous osteochondral mosaicplasty…………………………………………349
CULEA, L., FAUR, N., Stress-strain numerical and experimental analysis of the human
femur structure…………………………………………………………………………….353
GÁLFI, B., NECULA, R., ŞAMOTĂ, I., SZÁVA, I., KAKUCS, A., HOŢA, H., A
generalized electric strain gage-based evaluation of the long human bone
fixators’ stiffness…………………………………………………………………………...359
This volume contains the scientific papers presented at the 13 Symposium on Experimental Stress Analysis and Testing of Materials
Cluj-Napoca, 11th – 12th of july 2010