卖妄应动( Alternating Stress 第十4 交变应力 (Alternating stress) D11交变应力与疲劳失效( Alternating stress and fatigue failure) §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) 11-3持久极限( Endurance limit) s11-4影响持久极限的因素 (The effective factors of endurance limit)(Alternating Stress) 第十一章 交变应力 （Alternating stress） §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 )