Problem $9\mathrm{.}51$

$ln($Figure $1),{}_{xy}=63\mathrm{.}8$MPa.

Part A

Determine the principal stresses. Specify the orientation of the element.

Express your answers, separated by commas, to three significant figures. Choose the angle from the halfinterval $(-90$;$90$ J$.$

Figure

$1$ of $1$

Part B

Determine the maximum in$-$plane shear stress and average normal stress. Specify the orientation of the element.

Express your answers, separated by commas, to three significant figures. Choose the angle from the half$-$interval $(-90$;$901.$

${}_{}=1=,{}_{\text{a}\text{v}\text{g}}=,{}_s=$

MPa,MPa,

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