{"id":54063,"date":"2022-08-29T04:35:25","date_gmt":"2022-08-29T09:35:25","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/piezo-ceramics-how-to-define-strain\/"},"modified":"2025-01-20T23:29:51","modified_gmt":"2025-01-21T04:29:51","slug":"piezo-ceramics-how-to-define-strain","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/zh-hans\/piezo-ceramics-how-to-define-strain\/","title":{"rendered":"\u538b\u7535\u9676\u74f7\u6750\u6599\u5e94\u53d8\u5b9a\u4e49\u53ca\u6d4b\u91cf\u65b9\u6cd5\u8be6\u89e3"},"content":{"rendered":"<p>\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u5b9a\u4e49\u53ca\u5176\u6d4b\u91cf\u65b9\u6cd5\u662f\u4e00\u4e2a\u590d\u6742\u4e14\u591a\u65b9\u9762\u7684\u95ee\u9898\u3002\u538b\u7535\u9676\u74f7\u6750\u6599\u72ec\u7279\u7684\u538b\u7535\u6548\u5e94\uff0c\u4f7f\u5176\u5728\u65bd\u52a0\u673a\u68b0\u529b\u65f6\u4ea7\u751f\u7535\u8377\uff0c\u53cd\u4e4b\u4ea6\u7136\uff0c\u8fd9\u4f7f\u5f97\u5bf9\u5176\u5e94\u53d8\u7684\u5b9a\u4e49\u548c\u6d4b\u91cf\u4e0e\u666e\u901a\u6750\u6599\u6709\u6240\u4e0d\u540c\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u538b\u7535\u9676\u74f7\u5e94\u53d8\u7684\u5b9a\u4e49\uff0c\u5e76\u4ecb\u7ecd\u51e0\u79cd\u5e38\u89c1\u7684\u6d4b\u91cf\u65b9\u6cd5\u3002<\/p>\n<h3>\u538b\u7535\u9676\u74f7\u5e94\u53d8\u7684\u672c\u8d28<\/h3>\n<p>\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\uff0c\u662f\u6307\u5728\u5916\u529b\u4f5c\u7528\u4e0b\uff0c\u6750\u6599\u7684\u5f62\u53d8\u7a0b\u5ea6\u3002\u4e0e\u666e\u901a\u6750\u6599\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u79cd\u5f62\u53d8\u4e0d\u4ec5\u5305\u62ec\u5b8f\u89c2\u7684\u51e0\u4f55\u5c3a\u5bf8\u53d8\u5316\uff0c\u8fd8\u5305\u62ec\u6750\u6599\u5185\u90e8\u6676\u683c\u7ed3\u6784\u7684\u5fae\u89c2\u53d8\u5316\u3002\u8fd9\u79cd\u5fae\u89c2\u53d8\u5316\u4f1a\u5f71\u54cd\u6750\u6599\u7684\u7535\u6027\u80fd\uff0c\u4ece\u800c\u53ef\u4ee5\u95f4\u63a5\u5730\u901a\u8fc7\u6d4b\u91cf\u7535\u4fe1\u53f7\u6765\u786e\u5b9a\u5e94\u53d8\u3002  \u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u901a\u5e38\u7528\u5e94\u53d8\u7387(strain rate)\u548c\u5e94\u53d8\u5e45\u5ea6(strain amplitude)\u6765\u63cf\u8ff0\u3002\u5e94\u53d8\u7387\u8868\u793a\u5e94\u53d8\u968f\u65f6\u95f4\u7684\u53d8\u5316\u901f\u7387\uff0c\u800c\u5e94\u53d8\u5e45\u5ea6\u5219\u8868\u793a\u5e94\u53d8\u7684\u6700\u5927\u503c\u3002  \u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u662f\u975e\u7ebf\u6027\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5e94\u53d8\u4e0e\u65bd\u52a0\u7684\u529b\u5e76\u975e\u7b80\u5355\u7684\u7ebf\u6027\u5173\u7cfb\uff0c\u5c24\u5176\u662f\u5728\u5927\u5e94\u53d8\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n<h3>\u5e94\u53d8\u6d4b\u91cf\u65b9\u6cd5\uff1a\u57fa\u4e8e\u7535\u8377\u6cd5\u7684\u95f4\u63a5\u6d4b\u91cf<\/h3>\n<p>\u7531\u4e8e\u538b\u7535\u6548\u5e94\uff0c\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u53ef\u4ee5\u901a\u8fc7\u6d4b\u91cf\u5176\u4ea7\u751f\u7684\u7535\u8377\u91cf\u6765\u95f4\u63a5\u786e\u5b9a\u3002\u8fd9\u79cd\u65b9\u6cd5\u662f\u57fa\u4e8e\u538b\u7535\u65b9\u7a0b\uff1a<\/p>\n<p><code>D = dT + \u03b5E<\/code><\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>D \u4ee3\u8868\u7535\u4f4d\u79fb<\/li>\n<li>d \u4ee3\u8868\u538b\u7535\u5e38\u6570<\/li>\n<li>T \u4ee3\u8868\u5e94\u529b<\/li>\n<li>\u03b5 \u4ee3\u8868\u4ecb\u7535\u5e38\u6570<\/li>\n<li>E \u4ee3\u8868\u7535\u573a\u5f3a\u5ea6<\/li>\n<\/ul>\n<p>\u5728\u6052\u5b9a\u7535\u573a\u6761\u4ef6\u4e0b (E=0)\uff0c  \u6211\u4eec\u53ef\u4ee5\u7b80\u5316\u65b9\u7a0b\u4e3a\uff1aD = dT\u3002 \u7531\u4e8e\u5e94\u529b\u4e0e\u5e94\u53d8\u4e4b\u95f4\u5b58\u5728\u5173\u7cfb (\u4f8b\u5982\uff0c\u5728\u5f39\u6027\u8303\u56f4\u5185\uff0c\u9075\u5faa\u80e1\u514b\u5b9a\u5f8b\uff1a\u03c3 = YE\uff0c\u5176\u4e2d\u03c3\u4e3a\u5e94\u529b\uff0cY\u4e3a\u6768\u6c0f\u6a21\u91cf\uff0cE\u4e3a\u5e94\u53d8)\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6d4b\u91cf\u7535\u4f4d\u79fbD\u6765\u8ba1\u7b97\u5e94\u53d8\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u7cbe\u5ea6\u53d6\u51b3\u4e8e\u538b\u7535\u5e38\u6570d\u548c\u4ecb\u7535\u5e38\u6570\u03b5\u7684\u51c6\u786e\u6027\uff0c\u4ee5\u53ca\u6d4b\u91cf\u7535\u8377\u91cf\u7684\u7cbe\u5ea6\u3002<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u65b9\u6cd5<\/th>\n<th>\u4f18\u70b9<\/th>\n<th>\u7f3a\u70b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u57fa\u4e8e\u7535\u8377\u6cd5\u7684\u95f4\u63a5\u6d4b\u91cf<\/td>\n<td>\u7b80\u4fbf\u3001\u6210\u672c\u4f4e\u3001\u65e0\u9700\u63a5\u89e6\u5f0f\u6d4b\u91cf<\/td>\n<td>\u7cbe\u5ea6\u53d7\u538b\u7535\u5e38\u6570\u548c\u4ecb\u7535\u5e38\u6570\u5f71\u54cd\uff0c\u975e\u7ebf\u6027\u6548\u5e94\u663e\u8457<\/td>\n<\/tr>\n<tr>\n<td>\u57fa\u4e8e\u5149\u5b66\u7684\u76f4\u63a5\u6d4b\u91cf<\/td>\n<td>\u9ad8\u7cbe\u5ea6\u3001\u975e\u63a5\u89e6\u5f0f<\/td>\n<td>\u6210\u672c\u9ad8\u3001\u64cd\u4f5c\u590d\u6742<\/td>\n<\/tr>\n<tr>\n<td>\u57fa\u4e8e\u5e94\u53d8\u7247\u7684\u76f4\u63a5\u6d4b\u91cf<\/td>\n<td>\u6d4b\u91cf\u65b9\u4fbf\uff0c\u76f8\u5bf9\u7cbe\u5ea6\u9ad8<\/td>\n<td>\u5e94\u53d8\u7247\u7c98\u8d34\u4f1a\u5f71\u54cd\u6d4b\u8bd5\u7ed3\u679c\uff0c\u5bb9\u6613\u635f\u574f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u5e94\u53d8\u6d4b\u91cf\u65b9\u6cd5\uff1a\u57fa\u4e8e\u5149\u5b66\u7684\u76f4\u63a5\u6d4b\u91cf<\/h3>\n<p>\u9664\u4e86\u95f4\u63a5\u6d4b\u91cf\u65b9\u6cd5\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5149\u5b66\u65b9\u6cd5\u76f4\u63a5\u6d4b\u91cf\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u3002\u4f8b\u5982\uff0c\u6fc0\u5149\u5e72\u6d89\u6cd5\u53ef\u4ee5\u7cbe\u786e\u6d4b\u91cf\u6750\u6599\u8868\u9762\u7684\u5fae\u5c0f\u4f4d\u79fb\uff0c\u4ece\u800c\u8ba1\u7b97\u51fa\u5e94\u53d8\u3002\u8fd9\u79cd\u65b9\u6cd5\u5177\u6709\u9ad8\u7cbe\u5ea6\u548c\u975e\u63a5\u89e6\u5f0f\u7684\u4f18\u70b9\uff0c\u4f46\u6210\u672c\u76f8\u5bf9\u8f83\u9ad8\uff0c\u4e14\u64cd\u4f5c\u8f83\u4e3a\u590d\u6742\u3002<\/p>\n<h3>\u5e94\u53d8\u6d4b\u91cf\u65b9\u6cd5\uff1a\u57fa\u4e8e\u5e94\u53d8\u7247\u7684\u76f4\u63a5\u6d4b\u91cf<\/h3>\n<p>\u5e94\u53d8\u7247\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5e94\u53d8\u6d4b\u91cf\u5143\u4ef6\uff0c\u53ef\u4ee5\u7c98\u8d34\u5728\u538b\u7535\u9676\u74f7\u8868\u9762\uff0c\u901a\u8fc7\u6d4b\u91cf\u5e94\u53d8\u7247\u7684\u7535\u963b\u53d8\u5316\u6765\u8ba1\u7b97\u5e94\u53d8\u3002\u8fd9\u79cd\u65b9\u6cd5\u76f8\u5bf9\u7b80\u4fbf\uff0c\u4e14\u7cbe\u5ea6\u8f83\u9ad8\uff0c\u4f46\u5e94\u53d8\u7247\u7684\u7c98\u8d34\u4f1a\u5f71\u54cd\u6d4b\u8bd5\u7ed3\u679c\uff0c\u800c\u4e14\u5e94\u53d8\u7247\u5728\u9ad8\u9891\u6216\u5927\u5e94\u53d8\u6761\u4ef6\u4e0b\u5bb9\u6613\u635f\u574f\u3002<\/p>\n<h3>\u5f71\u54cd\u538b\u7535\u9676\u74f7\u5e94\u53d8\u7684\u56e0\u7d20<\/h3>\n<p>\u9664\u4e86\u5916\u529b\u4e4b\u5916\uff0c\u8bb8\u591a\u56e0\u7d20\u90fd\u4f1a\u5f71\u54cd\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\uff0c\u4f8b\u5982\u6e29\u5ea6\u3001\u9891\u7387\u3001\u504f\u7f6e\u7535\u538b\u4ee5\u53ca\u6750\u6599\u672c\u8eab\u7684\u7279\u6027\uff08\u5982\u6210\u5206\u3001\u70e7\u7ed3\u5de5\u827a\u7b49\uff09\u3002  \u8fd9\u4e9b\u56e0\u7d20\u7684\u76f8\u4e92\u4f5c\u7528\u4f7f\u5f97\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u884c\u4e3a\u975e\u5e38\u590d\u6742\uff0c\u9700\u8981\u8fdb\u884c\u7cbe\u7ec6\u7684\u5efa\u6a21\u548c\u5b9e\u9a8c\u7814\u7a76\u624d\u80fd\u51c6\u786e\u9884\u6d4b\u3002<\/p>\n<h3>\u7ed3\u8bba<\/h3>\n<p>\u51c6\u786e\u5b9a\u4e49\u548c\u6d4b\u91cf\u538b\u7535\u9676\u74f7\u7684\u5e94\u53d8\u5bf9\u4e8e\u5176\u5728\u5404\u79cd\u5e94\u7528\u4e2d\u7684\u6709\u6548\u4f7f\u7528\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u6982\u8ff0\u4e86\u538b\u7535\u9676\u74f7\u5e94\u53d8\u7684\u672c\u8d28\uff0c\u5e76\u4ecb\u7ecd\u4e86\u51e0\u79cd\u5e38\u89c1\u7684\u6d4b\u91cf\u65b9\u6cd5\uff0c\u5305\u62ec\u57fa\u4e8e\u7535\u8377\u6cd5\u7684\u95f4\u63a5\u6d4b\u91cf\u3001\u57fa\u4e8e\u5149\u5b66\u7684\u76f4\u63a5\u6d4b\u91cf\u548c\u57fa\u4e8e\u5e94\u53d8\u7247\u7684\u76f4\u63a5\u6d4b\u91cf\u65b9\u6cd5\u3002  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