The correct search should be: "Mecanica de Materiales – Madhukar Vable – PDF (legal)" . This article will guide you through who Professor Vable is, why his textbook is so valuable, and how to obtain it legally and affordably, avoiding the pitfalls of pirated PDFs.
If your specific need is a Spanish-language textbook on mechanics of materials, Vable’s book may not be the best fit, as it is written in English. Consider these excellent alternatives that are legally available in Spanish PDF (via purchase):
Madhukar Vable Common Title: Mechanics of Materials (Often searched in Spanish as Mecánica de Materiales )