Failure prediction for cross-rolled beryllium sheet material

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2804888· OSTI ID:237788

Roschke, P ^[1]; Mascorro, E ^[2]

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1. Texas A and M Univ., College Station, TX (United States). Dept. of Civil Engineering
2. Mustang Engineers, Houston, TX (United States)

A failure model for cross-rolled beryllium SR-200 sheets is developed for material loaded in a complex state of stress. Coefficients of the Tsai-Wu criterion are determined from a series of special laboratory experiments. Tests include circular plates loaded by a concentric ring, as well as in-plane compression and off-axis plate specimens. Complex states of stress lead to brittle failure of the anisotropic material. Failure surfaces obtained from the criterion form a family of ellipses when plotted in standard Cartesian coordinates. The criterion is incorporated into a general purpose finite element analysis code. Numerical simulation incrementally applies loads to a structural component that i being designed and checks each nodal point in the model for exceedance of the failure criterion. To demonstrate applicability of the predictive capability of the criterion, a 2.54-mm thick beryllium plate is placed under clamped edge conditions and loaded to failure by a central transverse point load. A numerical model of the structure predicts the failure load to within 3%.

• Sponsoring Organization: USDOE
• OSTI ID: 237788
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 2 Vol. 118; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BERYLLIUM
COMPRESSION STRENGTH
EXPERIMENTAL DATA
FINITE ELEMENT METHOD
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NUMERICAL ANALYSIS
POISSON RATIO
PREDICTION EQUATIONS
STRAINS
STRESSES
TENSILE PROPERTIES
ULTIMATE STRENGTH
YIELD STRENGTH
YOUNG MODULUS