《RESISTANCE STRAIN GAUGES THEIR CONSTRUCTION AND USE》求取 ⇩
| 作者 | J. YARNELL 编者 |
|---|---|
| 出版 | ELECTRONIC ENGINEERING |
| 参考页数 | 128 ✅ 真实服务 非骗流量 ❤️ |
| 出版时间 | 1951（求助前请核对） 目录预览 |
| ISBN号 | 无 — 违规投诉 / 求助条款 |
| PDF编号 | 813352418（学习资料 勿作它用） |
| 求助格式 | 扫描PDF（若分多册发行，每次仅能受理1册） |
INTRODUCTION1
1WIRE-WoUND STRAIN GAUGES4
Change of resistance of a stretched wire4
Range of application of strain gauges5
Construction of a strain gauge6
Coil-wound （solenoidal）type6
Grid type9
Commercial gauges10
Materials12
2CEMENTS14
General considerations14
Methods of applying heat to the surface16
Weather protection and waterproofing19
Properties of various cements20
3BRIDGE THEORY26
The basic circuit26
The Wheatstone bridge26
Voltage sensitivity27
Dependence of voltage sensitivity on gauge current and polarizing voltage29
Choice of the parameter“n”32
Current sensitivity32
Sensitivity with maximum gauge current34
Current sensitivity related to power dissipation36
Capacitor circuit for measuring alternating strains38
4 CIRCUITS AND METHODS40
The slide-wire bridge40
The multiple gauge circuit43
Temperature errors44
The temperature compensating gauge45
Recording steady strains47
The A.C.fed bridge47
Reactive balancing of the bridge50
The chopper method for D.C.amplification51
The D.C.pen-type recorder53
Recording alternating strains54
General considerations in the recording of alternating signals56
The confluent pulse technique59
Calibration of gauges59
5SLIP-RINGS64
The standard circuit64
The rotating bridge65
Slip-ring design66
Causes of hash67
The brush-ring surface67
Ring materials：surface films68
Brush design70
Ring insulation71
Bearings72
Mercury slip-rings73
6STRAIN-SENSITIVE LACQUER75
General considerations75
Practical details76
7STRESS AND STRAIN IN TWO DIMENSIONS79
The principal axes of stress79
Strain in two dimensions81
Mohr’s circles of Stress and Strain83
Limiting forms of Mohr’s circles89
8THE MEASUREMENT OF TWO-DIMENSIONAL STRAINS90
General considerations：Rosettes90
Analysis of Rosette results92
Arithmetical analysis of results：the 45°Rosette92
Arithmetical analysis of results：the 120°Rosette93
Analysis by Mohr’s circles：the 45°Rosette94
Analysis by Mohr’s circles：the 120°Rosette97
Analysis by reference to graphs：the 45°Rosette98
Analysis by reference to graphs：the 120°Rosette103
Relation between the 45°and the 120°charts106
Appendix108
1CROSS-SENSITIVITY OF A GAUGE108
2 THE WHEATSTONE BRIDGE AS A CURRENT SOURCE111
3 THE WHEATSTONE BRIDGE：SENSITIVITY RELATED TO POWER DISSIPATION114
4 THE BEHAVIoUR OF A STRETCHED OR HEATED WIRE116
Index125
1951《RESISTANCE STRAIN GAUGES THEIR CONSTRUCTION AND USE》由于是年代较久的资料都绝版了，几乎不可能购买到实物。如果大家为了学习确实需要，可向博主求助其电子版PDF文件（由J. YARNELL 1951 ELECTRONIC ENGINEERING 出版的版本） 。对合法合规的求助，我会当即受理并将下载地址发送给你。
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