Zobrazeno 1 - 10
of 23
pro vyhledávání: '"H. L. Schreyer"'
Autor:
H. L. Schreyer, Q. H. Zuo
Publikováno v:
The Journal of the Acoustical Society of America. 98:580-583
The acoustic tensor of a general anisotropic material is derived using the spectral representation of the elasticity tensor, an approach that makes the contribution from each projection operator more visible than the customary approach of using matri
Autor:
D. A. Parsons, H. L. Schreyer
Publikováno v:
Communications in Numerical Methods in Engineering. 11:563-573
Constraints arise naturally in the context of rigid inclusions, incompressibility, inextensible fibres and deformed finite elements. Typical methods for handling constraints in the governing matrix equation include Lagrange multipliers, penalty weigh
Autor:
N. R. Hansen, H. L. Schreyer
Publikováno v:
Journal of Applied Mechanics. 62:450-458
A phenomenological algorithm, motivated by the “mode I” microcrack opening and closing mechanism, is developed for the deactivation and reactivation of the damage effects as modeled by certain continuum damage mechanics theories. One-dimensional
Publikováno v:
Journal of Engineering Mechanics. 121:528-540
Rigid, closed-cell, polyurethane foams possess excellent energy-absorbing properties and are used as impact limiters for various packaging applications. They can absorb large quantities of energy a...
Autor:
H. L. Schreyer
Publikováno v:
International Journal of Damage Mechanics. 4:171-195
The general formulation for continuum damage, as for plasticity, is so broad that specific conclusions can be made only if simplifying assumptions are made. Experimental data do not support the simplification of isotropic damage. Here, the elasticity
Publikováno v:
Polymer Engineering and Science. 35:387-394
Rigid, closed-cell, polyurethane foam consists of interconnected polyurethane plates which form cells. When this foam is compressed, it exhibits an initial elastic regime which is followed by a plateau regime in which the load required to compress th
Publikováno v:
Journal of Engineering Mechanics. 120:1913-1930
A three‐dimensional plasticity model is developed for foams and honeycombs. The model accounts for the transverse isotropy of foams and the orthotropy of honeycombs by incorporating a shift on stress that provides a yield surface in the form of a s
Autor:
H. L. Schreyer
Publikováno v:
Computer Methods in Applied Mechanics and Engineering. 94:263-283
A method of obtaining element stiffness matrices without explicitly forming the element shape functions is described. The criteria for convergence and rank sufficiency are discussed in some detail. A systematic method for developing approximate stiff
Autor:
S. Yazdani, H. L. Schreyer
Publikováno v:
Journal of Engineering Mechanics. 116:1435-1450
A combined plasticity and damage mechanics model for concrete is developed within the general framework of the internal variable theory of thermodynamics. The necessity of using both plasticity and...
Autor:
H. L. Schreyer
Publikováno v:
IUTAM Symposium on Analytical and Computational Fracture Mechanics of Non-Homogeneous Materials ISBN: 9789048159772
One approach for describing material failure is that of using a discrete constitutive equation which relates traction to displacement discontinuity on a failure surface. Here we propose a failure function that might be considered a generalization of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d22beec7b158309bcc1fe1859274ff1
https://doi.org/10.1007/978-94-017-0081-8_1
https://doi.org/10.1007/978-94-017-0081-8_1