11–1 交变应力与疲劳失效(Alternating stress and fatigue failure) 11–3 持久极限(Endurance limit) 11–2 交变应力的循环特征、应力幅和平 均应力(The cycle symbol,stress amplitude and mean stress for alternating stress) 11–4 影响持久极限的因素 (The effective factors of endurance limit )
9-1 压杆稳定的概念 (The basic concepts of columns) 9-3 其它支座条件下细长压杆的临界压力 (Euler’s Formula for other end conditions ) 9-2 两端铰支细长压杆的临界压力 (The Critical Load for a straight, uniform, axially loaded, pin-ended columns)
4-1基本概念及工程实例 (Basic concepts and example problems) 4-2梁的剪力和弯矩(Shear- force and bending- moment in beams) 4-3剪力方程和弯矩方程剪力图和弯矩图 (Shear-force& bending-moment equations shear-force-& bending- moment diagrams)