Interactions of double slanted cracks under mode I loading Al Emran Ismail, Muhd Hafeez Zainulabidin, Fazimah Mat Noor, Hanani Abd Wahab, Maznan Ismon, Zaleha Mohamad and Mohd Amran Madlan MATEC Web Conf., 108 (2017) 12003 Published online: 31 May 2017 DOI: 10.1051/matecconf/201710812003