While there are many websites offering "free PDF downloads" of Strength of Materials

You can find various editions of the book through the following platforms:

by R.S. Khurmi, these are typically unauthorized digital copies that may violate copyright laws. To ensure you have a complete, legal, and high-quality version, it is recommended to purchase the physical book or the official eBook from reputable retailers like S. Chand Publishing Book Overview & Key Features A Textbook of Strength of Materials (also known as Mechanics of Solids