TY - JOUR
T1 - Evaluation of crack initiation angle under mixed mode loading at diverse strain rates
AU - Hernández-Gömez, L. H.
AU - Sauceda-Meza, I.
AU - Urriolagoitia-Calderön, G.
AU - Balankin, A. S.
AU - Susarrey, O.
N1 - Funding Information:
The grant 34950-U awarded by Consejo Nacional de Ciencia y Tecnologı́a and the support given to this project by COFAA and CGEPI of Instituto Politécnico Nacional are gratefully acknowledged. Also, the authors thank Mr. Cándido Zamora for the final numerical calculations.
PY - 2004/9
Y1 - 2004/9
N2 - Crack initiation angle, under mixed mode loading at several strain rates, is analysed using an experimental-numerical approach. The physical phenomenon for the problem at hand is influenced by the local and global conditions. One of such factors is the strain rate at the crack tip. For this purpose, PMMA plates with centred angled cracks under mixed mode loading were tested. The strain rate at the neighbourhood of the crack tip before crack propagation was evaluated. Considering that this material is strain rate sensitive, the numerical models were calibrated with the modulus of elasticity measured in tension tests at the observed strain rates. Numerical evaluations were performed with the finite element method in conjunction with the volume energy density criterion. An improvement in the evaluation of the crack propagation angle was observed. In order to complete the analysis, the crack initiation angle was also evaluated with the strain energy density factor S, considering the mechanical properties of PMMA, as evaluated at the observed strain rates, and the stress intensity factors k1 and k2. Results are in agreement with those observed experimentally.
AB - Crack initiation angle, under mixed mode loading at several strain rates, is analysed using an experimental-numerical approach. The physical phenomenon for the problem at hand is influenced by the local and global conditions. One of such factors is the strain rate at the crack tip. For this purpose, PMMA plates with centred angled cracks under mixed mode loading were tested. The strain rate at the neighbourhood of the crack tip before crack propagation was evaluated. Considering that this material is strain rate sensitive, the numerical models were calibrated with the modulus of elasticity measured in tension tests at the observed strain rates. Numerical evaluations were performed with the finite element method in conjunction with the volume energy density criterion. An improvement in the evaluation of the crack propagation angle was observed. In order to complete the analysis, the crack initiation angle was also evaluated with the strain energy density factor S, considering the mechanical properties of PMMA, as evaluated at the observed strain rates, and the stress intensity factors k1 and k2. Results are in agreement with those observed experimentally.
UR - http://www.scopus.com/inward/record.url?scp=10044287415&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2004.06.008
DO - 10.1016/j.tafmec.2004.06.008
M3 - Artículo
SN - 0167-8442
VL - 42
SP - 53
EP - 61
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
IS - 1
ER -