Fig. 5

Failure surface of typical test pieces. (a)1.0-FF-S1- W25-L50-E; (b)1.0-FF-S1- W25-L50-R; (c)0.5-PF-S1- W25-L65-E; (d)0.5-PF-S1- W25-L65-R; (e)1.0-FF-S2- W25-L30-E; (f)1.0-FF-S2- W25-L30-R.

Failure surface of typical test pieces. (a)1.0-FF-S1- W25-L50-E; (b)1.0-FF-S1- W25-L50-R; (c)0.5-PF-S1- W25-L65-E; (d)0.5-PF-S1- W25-L65-R; (e)1.0-FF-S2- W25-L30-E; (f)1.0-FF-S2- W25-L30-R.