鍇论 (Preface _心」 第一章绪论( Preface) 引盲( Introduction) 1-1材料力学的任务及研究对象(The tasks and research objects of mechanics of materials) 1-2变形固体的基本假设( The basic assumptions of deformable body 下51-3力、应力、应变和位移的基本概念 Basic concepts of force, stress, strain and displacement) p§1-4杆件变形的基本形式( The basic forms of deformation)(Preface) 第一章 绪 论 (Preface) §1-1 材料力学的任务及研究对象(The tasks and research objects of mechanics of materials) §1-2 变形固体的基本假设(The basic assumptions of deformable body ) §1-3 力、应力、应变和位移的基本概念 ( Basic concepts of force、stress、 strain and displacement) §1-4 杆件变形的基本形式 (The basic forms of deformation) 引言(Introduction)