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Détails bibliographiques
Auteur principal:	A. Cruz Crespo
Format:	Artículo científico
Langue:	es
Publié:	Universidad Autónoma de Yucatán 2008
Sujets:	Computación tratamiento por explosivos alivio de esfuerzos residuales Esfuerzos residuales en uniones soldadas
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=46712101
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Reducción de esfuerzos residuales en uniones soldadas usando tratamiento con explosivo A. Cruz Crespo J. L García Jacomino J. Burgos Sola M. Álvarez Luna J. García Arteaga Computación tratamiento por explosivos alivio de esfuerzos residuales Esfuerzos residuales en uniones soldadas En el trabajo se evalúa el efecto de la detonación de un explosivo como método para reducir los esfuerzos residuales en la zona afectada por el calor en las uniones soldadas. Se realizó un análisis comparativo de dos alternativas de colocación de la carga explosiva: una de forma lineal y la otra de forma sinusoidal. Los resultados experimentales obtenidos corroboraron la efectividad del método y demostraron que en ambas formas o alternativas se logró una disminución de los esfuerzos residuales entre el 50 y el 60%, comprobándose que el tratamiento ofrece una alternativa viable para extender la vida útil de las uniones soldadas. 2008 artículo científico 1665-529X https://www.redalyc.org/articulo.oa?id=46712101 es http://www.redalyc.org/revista.oa?id=467 Ingeniería application/pdf Universidad Autónoma de Yucatán Ingeniería (México) Num.1 Vol.12

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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