固体力学是力学中研究固体机械性质的学科，连续介质力学组成部分之一，主要研究固体介质在外力、温度和形变的作用下的表现，是连续介质力学的一个分支。一般包括材料力学、弹性力学、塑性力学等部分。固体力学广泛的应用张量来描述应力、应变和它们之间的关系。

在固体力学中，线性材料模型的应用是最为广泛的，但是很多材料是具有非线性特性的，随着新材料的应用和原有材料达到它们应用之极限，非线性模型的应用愈加广泛。

Solid mechanics is the branch of continuum mechanics that studies the behavior of solid materials, especially their motion and deformation under the action of forces, temperature changes, phase changes, and other external or internal agents.

Solid mechanics is fundamental for civil, aerospace, nuclear, and mechanical engineering, for geology, and for many branches of physics such as materials science. It has specific applications in many other areas, such as understanding the anatomy of living beings, and the design of dental prostheses and surgical implants. One of the most common practical applications of solid mechanics is the Euler-Bernoulli beam equation. Solid mechanics extensively uses tensors to describe stresses, strains, and the relationship between them.