影响材料疲劳强度的八大因素，外在影响因素包括零部件形状尺寸、表面加工状态、超过载损伤和次载锻炼等，内在影响因素包括材料化学成分、热处理和显微组织状态、夹杂物纯净度、表面性能变化及残余应力集中等。材料疲劳强度对各种外在内在因素都极为敏感，研究各种因素对材料疲劳强度影响，将为零部件结构设计、材料正确选用、制订合理冷热加工处理工艺提供依据。材料疲劳强度试验轴向变动载荷和循环应力加载时，表面处理只能改善表面层的疲劳性能。hrjtest；弯曲疲劳和扭转疲劳试验，表层材料硬度强化后，能有效提高弯曲和扭转疲劳强度。材料疲劳过程也是裂纹萌生相扩展的过程。
1000N电缆夹耐力旋转弯曲疲劳试验机20kN慢拉伸应变速率腐蚀疲劳试验机；1000kN200kN井盖压力动态疲劳试验机；50kN钢丝应力腐蚀松弛试验机；600kN钢绞线应力腐蚀疲劳试验机；300kN钢筋钢棒应力腐蚀松弛试验机；100kN拉伸蠕变持久强度试验机；300kN高温持久强度试验机；1000kN钢筋套筒灌浆连接件反复拉压试验机；150N.m防火门闭门器启闭可靠性试验机；10kN医疗器械疲劳寿命试验机；5kN外科植入物疲劳试验机；5kN电子伺服动态疲劳试验机；5kN接骨板骨螺钉骨针弯曲疲劳试验机；5kN带柄股骨部件疲劳性能试验机；5kN椎间融合器生物力学性能试验机；100N.m浮动油封跑合磨损泄漏性能试验机；5000N浮封跑合摩擦磨损试验机；100kN4000N.m履带密封圈高低温压扭疲劳寿命试验机；150kN轮毂旋转弯矩振动加速度疲劳试验机；150kN车轮轮毂旋转弯曲疲劳试验机；3mm金属线材双头扭转疲劳试验机；13mm金属线材扭转疲劳试验机；11mm碳纤维芯棒扭转疲劳试验机；电子伺服拉压扭转疲劳试验机；50N.m螺栓螺钉扭矩疲劳试验机；40kN.m螺栓连接副摩擦系数试验机；5kN.m零部件高低温扭转试疲劳验机；20kN.m传动轴半轴扭转疲劳试验机；2000N.m五金工具旋具扭转疲劳试验机；500N.m阀门管材管件扭转疲劳试验机；30kN.m万向节扭转疲劳试验机；100N.m光缆光纤接头盒连接器旋转弯曲疲劳试验机；300kN空气橡胶弹簧二维刚度疲劳试验机；65kN悬架空气弹簧高低温台架疲劳试验机；30kN驾驶室空气弹簧高低温台架疲劳试验机；35kN高速动车减振器疲劳寿命试验机；十工位螺旋弹簧疲劳试验机；2工位气压棒拉压疲劳试验机；5kN床垫弹簧疲劳试验机；50kN多工位空气弹簧疲劳试验机；对称循环疲劳极限维勒曲线；5kN填料密封件疲劳寿命试验机；10kN聚合物复合材料拉拉疲劳试验机；500N橡塑高分子拉压疲劳试验机；10kN密封胶拉压疲劳试验机；250kN材料部件拉压弯疲劳试验机；50kN铝型材拉压弯疲劳性能试验机；100kN橡胶弹性缓冲垫层疲劳试验机；300kN钢绞线轴向力疲劳试验机；500kN混凝土疲劳强度试验机；300kN板弹簧疲劳试验机；20kN铁路弹条疲劳试验机；
Tension Compression Bending Torsion Fatigue Tester；Manhole Cover Dynamic Fatigue Tester；Steel wires Corrosion Relaxation Tester；High temperature Lasting Strength Tester；Steel strand Stress Corrosion Relaxation Tester；Steel bars Stress Corrosion Relaxation Tester；Repeated Tension Compression Fatigue Tester for Grout Sleeve Splicing of Rebars；Fire-proof Door Closer Reliability Tester；Medical Device Products Fatigue Life Tester；Implants for Surgery Cyclic Fatigue Tester；Electronic Servo Dynamic Fatigue Tester；Metallic Bone Plates Fatigue Tester；Intervertebral Body Fusion Device Biomechanics Tester；Floating Seal Running Wear Leakage Performance Running Tester；Floating Ring Seal Friction Wear Tester；Sealing Ring High Low Temperature Compressive Torsion Fatigue Tester；Caterpillar Band Sealing Ring Fatigue Durability Life Tester；Wheel Hub Rotating Moment Vibration Acceleration Fatigue Tester；Metal Material Wire Torsion Fatigue Tester；Fiber Composite Core Bar Torsion Tester；Screws Studs Bolt Torsion Fatigue Tester；Preloading Structural Bolting Assemblies Tester；Pipe Fittings Torsion Fatigue Tester；Universal Joint Torsion Fatigue Tester；Optical Cables Splice Torsion Bending Fatigue Tester；Air Rubber Spring Stiffness Fatigue Tester；High Speed Train Shock Absorber Fatigue Life Tester；Ten Position Spring Fatigue Tester；Air Spring High Low Temperature Fatigue Tester；Slow Strain Rate Stress Corrosion Tester；Rubber Plastic Polymer Materials Tensile Compression Fatigue Tester；Polymer Matrix Composite Materials Tension Fatigue Tester；Sealant Tensile Compression Fatigue Tester；Aluminium Alloys Dynamic Fatigue Tester；Steel Strand Axial Force Fatigue Tester；Concrete Fatigue Strength Tester；Cable clamp Rotary Bending Endurance Tester；
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