21.1.1 Brittle Cracking

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21.1.1 Brittle Cracking

Brittle behavior is characterized by the full reduction of the strength after the strength criterion has been violated [Fig.21.3].

**Figure 21.3:** Brittle cracking behavior
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This behavior can be written as

$\displaystyle {\frac{{f_{n} (\Delta u_{n})}}{{f_{\mathrm{t}}}}}$ = $\begin{displaymath}\begin{cases} 1 \qquad & \text{if $\Delta u_{n}\leq 0$} \\ [2ex] 0 & \text{if $0 < \Delta u_{n}< \infty$} \end{cases}\end{displaymath}$

(21.8)

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