T.S. Chang, and E. Magrab
University of Maryland
College Park, MD 20742
An improved means of obtaining the elastic constants of component-lead-board
assemblages from two three-point bending tests and one four-point torsion
test is proposed. The suggested method models the three-point bending
test as an orthotropic plate and uses the experimentally obtained bending
and torsion results in a standard nonlinear least square procedure to determine
the rigidities in the x and y directions and the Poisson's ratios directly.
Numerical simulation of the method indicates that the beam model overestimates
the elastic moduli by 4 to 7 percent and the corresponding rigidities
by 7 to 13 percent.
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