Hello, I'm trying to apply formula 30 as described on page 12 of this paper:(adsbygoogle = window.adsbygoogle || []).push({});

https://lirias.kuleuven.be/bitstream/123456789/261102/1/IJAMT_journal_final.pdf

However, the results I am getting when testing against the table of results on that same page for Al 2024 (Rm = 435 N/mm^{2}) are off in my javascript interpretation:

Any help would be appreciated. Thanks.Code (Text):

<script>

function toRadians (angle) {

return angle * (Math.PI / 180);

}

function c(t, dt, a, dh, measured, computed, error) {

var Rm = 435; // tensile strength of aluminum 2024

var Fz_s = 0.0716 * Rm * Math.pow(t,1.57) * Math.pow(dt,0.41) * Math.pow(dh,0.09) * a * Math.cos(toRadians(a));

console.log(Fz_s + ":" + computed)

}

c(0.4, 10, 20, 0.005, 177.7, 192.9, 8.6);

c(0.4, 10, 20, 0.015, 197.3, 213.0, 7.9);

c(0.4, 10, 35, 0.005, 333.4, 320.6, -3.8);

c(0.4, 10, 35, 0.015, 368.7, 354.0, -4.0);

c(0.4, 20, 20, 0.005, 300.9, 256.4, -14.8);

c(0.4, 20, 20, 0.015, 341.5, 283.0, -17.1);

c(0.4, 20, 35, 0.005, 581.8, 426.0, -26.8);

c(0.4, 20, 35, 0.015, 618.7, 470.3, -24.0);

c(1.0, 10, 20, 0.005, 767.6, 813.2, 5.9);

c(1.0, 10, 20, 0.015, 822.0, 897.7, 9.2);

c(1.0, 10, 35, 0.005, 1244.6, 1351.4, 8.6);

c(1.0, 10, 35, 0.015, 1418.0, 1491.9, 5.2);

c(1.0, 20, 20, 0.005, 1092.5, 1080.5, -1.1);

c(1.0, 20, 20, 0.015, 1229.6, 1192.8, -3.0);

c(1.0, 20, 35, 0.005, 1825.2, 1795.6, -1.6);

c(1.0, 20, 35, 0.015, 2056.5, 1982.2, -3.6);

</script>

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# SPIF formula interpretation assistance

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