CORRIGENDA

"Elastic Crack Interaction for Inclined Cracks," A. Dolgopolsky, V. Karbhari, and S.S. Kwak*

The summation on the second term of Eqn. (1) should read as

$$ \sum_{k=1}^{N} \sum_{k' \neq i} $$

and Eqn. (2) should read

$$ K_{1}^{\text{eff}} = K_{1}^{0} + \frac{1}{\sqrt{\pi \ell_{0}}} \int_{-\ell_{0}}^{\ell_{0}} \left[ \frac{\ell_{0} + \xi}{\ell_{0} - \xi} \right] \sim_{n} \sum_{i=1}^{N} \hat{\sigma}_{i}(x) \cdot \text{ndx} $$

The editor joins with the authors in apologizing for any confusion that may have resulted from these typographical errors.

"Transient Propagation of Anti-plane Cracks Opened by Time Varying Loads," P.S. Theocaris and H.G. Georgiadis**

The last two relations (Eqns. (30) and (31)) are in error. This is because the behavior of the time-derivative of stress at the crack tips was not taken properly into account.

The corrected relations (30) and (31) should read as follows:

$$ \dot{t}_{\theta z}(x, 0, t) = \frac{-(\nu/c) P_0 (c^2 t^2 - x^2)^{\frac{1}{2}}}{\pi x (x^2 - \nu^2 t^2)^{3/2}} \quad (30) $$

and

$$ \begin{aligned} \tau_{\theta z}(x, 0, t) = &- \frac{(\nu/c) P_0}{\pi x} \frac{c}{\nu} \int_{x/c}^{t} \frac{[t^2 - (x/c)^2]^{\frac{1}{2}}}{[x/\nu)^2 - t^2]^{3/2}} dt = \\ &- \frac{P_0}{\pi x} \left[ \frac{1}{t} \left[ \frac{t^2 - (x/c)^2}{(x/\nu)^2 - t^2} \right]^{\frac{1}{2}} - \frac{\nu}{x} E(k, q) \right] , \end{aligned} \quad (31) $$

where all symbols are defined in the paper.

*International Journal of Fracture 38 (1988) R31-R34.

**International Journal of Fracture 28 (1985) 223-230.
"On the Calculation of Energy Release Rates for Cracked Laminates," J.G. Williams*

In the solution given for the correction factor for lateral splitting under an axial load there is an error in the second of (25).

It should read

$$Y_{\text{IT}}^2 = \frac{1}{2(1 - \frac{a}{w})} \left[ 1 + \frac{3\left(\frac{a}{w}\right)\left(1 - \frac{a}{w}\right)}{\left[\left(\frac{a}{w}\right)^3 + \left(1 - \frac{a}{w}\right)^3\right]} \right]$$

The corresponding values given in Table I are also in error and should be;

<table><tr><td>(a/w)</td><td>0</td><td>.1</td><td>.2</td><td>.3</td><td>.4</td><td>.5</td><td>.6</td><td>.7</td><td>.8</td><td>.9</td></tr><tr><td>Y<sup>2</sup><sub>IT</sub></td><td>.5</td><td>.761</td><td>1.202</td><td>1.931</td><td>2.976</td><td>4.000</td><td>4.464</td><td>4.505</td><td>4.808</td><td>6.849</td></tr></table>

*International Journal of Fracture 36 (1988) 101-119.

Int Journ of Fracture 40 (1989)