In this paper the impact of square opening. as a source of stress concentration. on the distribution of stress in parts of machines and devices is considered. The fact is that these forms of the openings occur less in practice. https://www.roneverhart.com/Asus-ROG-Zephyrus-GU502LV-BI7N8-15-6-4K-3840x2160-IPS-Intel-i7-10750H-2-6-GHz-16GB-1TB-SSD-NVIDIA-GeForce-RTX-2060-6G/